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Applent Instruments AT381x User Manual Download Page 90

AT381x User's Guide

90

11.

Modbus

（

RTU

）

Protocol

This chapter include the following information:



Data format – About the Modbus communication format.



Function



Variable Area



Function Code

11.1

Data Format

We follow the Modbus (RTU) communication protocol, the instrument will respond to
commands of the host computer and return the standard response frame.

Reference

：



You can contact our sales department to get the communication test tool, which has
Modbus communication debugging method. It contains CRC-16 calculator and floating
point numbers into Modbus floating point format.

11.1.1

Command Frame

Figure 11-1

Modbus Command Frame

Table 11-1

Command Frame Description

At least 3.5 character time squelch interval is requested

Station address

1 byte
Modbus can support 00~0x63 stations
Designated as 00 when unified broadcast
In instruments that do not have an optional RS485, the default
station address is 0x01

Function code

1 byte
0x03: Read multiple registers
0x04: =03H, not used
0x06: Write to a single register, can use 10H instead
0x08: Echo test (used only for debugging)
0x10: Write to multiple registers

Data

Specify register address, quantity, and content

CRC-16

2 bytes, low in front
Cyclic Redundancy Check
Calculate all data from the station address to the end of the data to

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Summary of Contents for AT381x

Page 1: ...A7 0 AT381x LCR Meter Instruments Applent Instruments Ltd No 61 3 Baolong International Chahua Road Zhonglou District Changzhou City Jiangsu Province China 213014 Tel 0519 88805550 Fax 0519 86922220 http www applent com Sales Email sales applent com Tech Email tech applent com 2005 2019 Applent Instruments Ltd ...

Page 2: ...ment To avoid electric shock hazard the instrument chassis and cabinet must be connected to a safety earth ground by the supplied power cable with earth blade DO NOT Operate in an Explosive Atmosphere Do not use the instrument in a flammable or explosive atmosphere steam or dusty environment The use of any electronic device in such an environment is an adventure for personal safety DO NOT Open ins...

Page 3: ...s product must be returned to a service facility designated by Applent The buyer shall prepay shipping charges to Applent and Applent shall pay shipping charges to return the product to the Buyer However the Buyer shall pay all shipping charges duties and taxes for products returned to Applent from another country Applent warrants that its software and firmware designated by Applent for use with a...

Page 4: ... 2 2 Equivalent Method 17 2 2 3 Range 18 2 2 4 Measurement Speed 18 2 2 5 Trigger Mode 18 2 2 6 Basic Accuracy 18 Measurement Display Range 18 2 3 Signal Source 18 2 3 1 Test Frequency 18 2 3 2 Test Signal Level 19 2 3 3 Constant Voltage Source Internal Resistance 19 Test Signal Level Monitoring 19 2 4 Main Functions 19 2 4 1 Correction Function 19 2 4 2 Comparator Function Sorting Function 19 2 4...

Page 5: ... Impedance SRC RES 37 5 1 2 Averaging Factor AVG 37 5 1 3 DC Bias Voltage BIAS 38 5 1 4 Auto LCZ Function AUTO LCZ 38 5 1 5 Monitor 1 and Monitor 2 MON 1 MON 2 Parameter Selection 38 5 1 6 Measurement DELAY 39 5 1 7 Auto Level Control ALC 39 5 1 8 NOMINAL Value Setting 39 5 2 CORRECTION Page 40 5 2 1 Open Correction OPEN 40 5 2 2 Short Correction SHORT 41 5 2 3 Frequency spot 1 2 3 Correction SPOT...

Page 6: ...3 Restore to DEFAULT SET 55 6 2 System Information Page 55 7 File Operation 56 7 1 FILE Page 56 7 1 1 MEDIA Selection 56 7 1 2 Recall a File at Startup AUTO RECALL 57 7 1 3 Auto save data to last file AUTO SAVE 57 7 1 4 File operation 57 8 Handler Interface 58 8 1 Pin Assignment 58 8 2 How to Connection 59 8 3 Timing Chart 60 9 Remote Control 62 9 1 About RS 232C 62 9 1 1 RS232C Connection 62 9 1 ...

Page 7: ...tem 75 10 10 1 APERture RATE 75 10 10 2 APERture AVG 76 10 11 FETCh Subsystem 76 10 11 1 FETCh 76 10 11 2 FETCh IMPedance 76 10 11 3 FETCh MAIN 76 10 11 4 FETCh MONitor1 2 77 10 11 5 FETCh MONitor 77 10 12 COMParator Subsystem 77 10 12 1 COMParator STATe 78 10 12 2 COMParator MODE 78 10 12 3 COMParator AUX 79 10 12 4 COMParator BINS 79 10 12 5 COMParator TOLerance NOMinal 79 10 12 6 COMParator TOL...

Page 8: ... 88 10 20 2 TRG 88 10 20 3 SAV 88 10 20 4 RCL 89 11 Modbus RTU Protocol 90 11 1 Data Format 90 11 1 1 Command Frame 90 11 1 2 CRC 16 Calculation Method 91 11 1 3 Response Frame 92 11 1 4 No Response 92 11 1 5 Error Code 93 11 2 Function Code 93 11 3 Register 93 11 4 Read Multiple Registers 93 11 5 Writing to Multiple Registers 94 11 6 Echo Test 95 12 Modbus RTU Command 97 12 1 Register Overview 97...

Page 9: ...mary Parameter Limit Value Register 3110H 3133H 116 12 5 File Operation 116 12 5 1 Save to Current File 4000H 116 12 5 2 Save to Specified File 4008H 117 12 5 3 Reloading the Current File 4010H 117 12 5 4 Load the Specified File 4018H 117 12 6 Correction 118 12 6 1 Full frequency Open Circuit Correction 5000H 118 12 6 2 Full frequency Short circuit Correction 5008H 119 12 6 3 Spot frequency Correc...

Page 10: ... 34 Figure 5 1 MEAS SETUP Page 36 Figure 5 2 CORRECTION Page 40 Figure 5 3 Stray Admittance 40 Figure 5 4 Residual Impedances 41 Figure 5 5 BIN TABLE page 43 Figure 5 6 Tolerance mode 44 Figure 5 7 Example of sorting in tolerance mode 44 Figure 5 8 Sequential mode 44 Figure 5 9 LIST TABLE Page 47 Figure 5 10 Sweep Mode 48 Figure 6 1 SYSTEM CONFIG Page 50 Figure 6 2 SYSTEM INFORMATION page 55 Figur...

Page 11: ...ltiple Registers 0x03 Response Frame 94 Figure 11 7 Writing to multiple registers 0x10 94 Figure 11 8 Write to Multiple Registers 0x03 Response Frame 95 Figure 11 9 echo test 0x08 95 Figure 13 1 Basic measurement accuracy A 123 Figure 13 2 Basic accuracy correction curve 124 Figure 14 1 Measurement flow chart 129 Figure 14 2 Capacitor test results 131 ...

Page 12: ... Table 4 12 Sweep trigger mode 33 Table 4 13 sweep method 34 Table 5 1 Sweep mode description 47 Table 6 1 SCPI error code 54 Table 8 1 Description of Handler Interface Output Signals 58 Table 8 2 Description of Handler Interface Input Signals 59 Table 8 3 Description of Handler Interface Power Rating Signals 59 Table 8 4 Timing 60 Table 9 1 Minimum subset of the RS 232 standard 62 Table 10 1 Mult...

Page 13: ...t Instruments Sales or distributor immediately 1 2 Power Requirements AT381x can only be used in the following power conditions Voltage 90V 260VAC Power up to 30VA Warning To prevent electric shock please connect the power ground If users replace power cord make sure that the ground of the power cord is securely connected 1 3 Operating Environment AT381x must be used under the following environmen...

Page 14: ...AT381x User s Guide 14 the AT381x internally WARNING Don t Use Organic Solvents such as alcohol or gasoline to clean the instrument ...

Page 15: ...e 1 1 Instrument handle schematic panel graphics do not match the actual Position 1 Hands hold both sides of the handle at the same time gently pull it to the sides until it can rotate freely then switch to the Position 2 Handheld position position 2 hold both sides of the handle at the same time gently pull it to the sides until it can rotate freely then switch to the handheld position Remove han...

Page 16: ...ac Iac and can be displayed at the same time With an accuracy of up to 0 05 the instrument can meet requirements of accurate testing and mass production by various component manufacturers schools research institutes and metrological quality inspection departments The instrument has a professional sorting function with 10 sets of storage files programmable 9 qualified file 1 auxiliary file secondar...

Page 17: ...It can be mathematically converted using a formula but the two forms are different inconsistency depends on the quality factor Q or loss D Table 2 1 Series parallel equivalent circuit Circuit Form Loss D Equivalent Conversion L Lp Rp D 2πFLp Rp 1 Q Ls Lp 1 D2 Rs RpD2 1 D2 D Rs 2πFLs 1 Q Lp 1 D2 Ls Rp 1 D2 Rs D2 C Cp Rp D 1 2πFCpRp 1 Q Cs 1 D2 Cp Rs RpD2 1 D2 Cs Rs D 2πFCsRs 1 Q Cp Cs 1 D2 Rp Rs 1 ...

Page 18: ...1 256 programmable average times can be performed to improve reading stability 2 2 5 Trigger Mode Internal external manual and remote trigger 2 2 6 Basic Accuracy AT3818 0 05 AT3816A 0 05 AT3816B 0 1 AT3817A 0 05 AT3810A 0 05 AT3817D 0 1 Measurement Display Range Table 2 2 AT381x Measurement display range Parameter Measurement display range L 0 00001nH 9999 99H C 0 00001pF 999 999mF R X Z 0 00001Ω...

Page 19: ...ero Short circuit clear zero Eliminate effects of series resistance and inductance of the leads The instrument can perform single point thre point frequency short circuit clear zero or sweep frequency all typical frequency short circuit clear zero 2 4 2 Comparator Function Sorting Function The instrument can perform multiple sorting sorting is based on the measured values regardless of deviation m...

Page 20: ...eep point can output HI IN LO high pass low discrimination The list sweep limit sets are the upper and lower limit values 2 4 4 File Function There are 10 files in the instrument s internal flash memory that users can use to save instrument data These data include 1 All parameters in Settings page 2 Setting data in Comparator Setting page 3 Setting data in Setup List Sweep page 2 4 5 System Settin...

Page 21: ...t side 3 1 Front Panel 3 1 1 Front Panel Description Figure 3 1 front panel Table 3 1 Front Panel Description No Description 1 USB Disk Port USB Host 2 Manual trigger button and manual or remote trigger indicator 3 Power switch Touch button Warning In order to ensure the safety of power supply inside the machine the instrument needs to wait 2 seconds after the power is turned off to allow it to st...

Page 22: ... panel The button is a touch button press the power button for 1s the instrument will start or shut down In order to ensure the safety of power supply inside the machine the instrument needs to wait 2 seconds after the power is turned off to allow it to start again 3 2 2 Warm up Time In order to achieve the accuracy rating warm up the instrument for at least 30 minutes 3 3 Connect to Device under ...

Page 23: ...ade by user or other company may result in incorrect measurements Our test fixture contact reeds are silver plated or gold plated In long term work for example 1 2 years the plating surface will be worn It is recommended to replace the new fixtures when there are obvious deviations in several tests Connect test fixture or test cable to four test terminals of Hcur Hpot Lcur and Lpot on the front pa...

Page 24: ...ange range number and automatic manual test FREQ Measurement frequency TRIG Trigger Setup LEVEL Test signal level SPEED Test speed The primary and secondary test results are displayed in this area in large characters monitor area is displayed in small characters In the lower part of the screen some measurement related settings are displayed in this area and the currently tested comparator results ...

Page 25: ...el equivalent circuit model Ls Inductance value measured using the series equivalent circuit model Lp Inductance value measured using the parallel equivalent circuit model Rs Series equivalent resistance Rp Parallel equivalent resistance DCR DC resistance Z Absolute value of impedance Y Absolute value of admittance G Conductance B Sustenance R Resistance Rs X Reactance D Dissipation factor Q Quali...

Page 26: ...Available impedance range The instrument has 9 ranges they includes 10Ω 30Ω 100Ω 300Ω 1kΩ 3kΩ 10kΩ 30kΩ 100kΩ During the test the instrument selects appropriate range according to impedance of the device under test Table 4 5 Range and corresponding test range Range No Range Definition Impedance Measuring Range 8 10Ω 0 10Ω 7 30Ω 10Ω 100Ω 6 100Ω 100Ω 316Ω 5 300Ω 316Ω 1kΩ 4 1kΩ 1kΩ 3 16kΩ 3 3kΩ 3 16k...

Page 27: ...ency range F Resolution 10 0000Hz F 99 9999Hz 0 0001Hz 100 0000Hz F 999 999Hz 0 001Hz 1 00000kHz F 9 99999kHz 0 01Hz 10 0000kHz F 99 9999kHz 0 1Hz 100 000kHz F 300 000kHz 1Hz Frequency accuracy 0 01 Procedure for setting the test frequency Step 1 Use cursor keys to select Frequency field Step 2 Use cursor keys to select Frequency field Soft key Function INCR Frequently used frequency list DECR Fre...

Page 28: ... Step 2 Use cursor keys to select TRIG field Soft key Function INT Internal Trigger Mode MAN Manual Trigger Mode EXT External Trigger Mode BUS Remote Trigger Mode 4 1 5 Test Signal Voltage Level LEVEL Test level of the instrument is set with the true RMS value of the sine wave signal The frequency of the sine wave signal is the test frequency and is generated by the internal oscillator of the inst...

Page 29: ...asurement about 40 times sec The measurement speed refers to the time when Handler interface is triggered to the end of measurement EOM output 1 Measurement frequency 300 kHz 2 Page BIN MEAS Page 3 Range Hold range or nominal range 4 Average 1 5 DC Bias OFF 6 Automatic LCZ parameters OFF 7 Monitor 1 OFF 8 Monitor 2 OFF 9 ALC OFF ms Test frequency Hz Speed 10 20 100 1k 2k 10k 100k 300k DCR SLOW 160...

Page 30: ... Function SAVE to USB Save data to a USB disk file CLEAR BUFFER The buffer is cleared and the current data is invalid Note Before using the saved data insert the USB disk on the interface of front panel The saved file is in the DATA subfolder in the same folder as the USB disk The file name is 001 CSV For example F AT3818 DATA 001 CSV Up to 1000 files can be saved from 001 CSV to 999 CSV The buffe...

Page 31: ...nto an auxiliary BIN AUX The comparator is allowed to be turned off Comparator Workflow Figure 4 3 Comparator Workflow Sorting Start BIN1MIN Δor BIN1MAX BIN9MIN Δor BIN9MAX DMIN D DMAX or QMIN Q QMAX Primary parameter pass Display BIN1 BIN9 END Not Good Display NG Output NG AUX Display AUX Output AUX NO AUX ON OFF YES Output SREJ NO GOOD Display GD Output GD YES YES NO Procedure for setting the co...

Page 32: ...NT soft key the BIN COUNT page appears Figure 4 4 BIN COUNT page The BIN COUNT page will display the count result of the comparator Settings bar Bin count Information Bar The following count values are monitored in the information bar Bin1 Bin9 count value 2nd secondary parameter failure number AUX Unqualified number OUT If the condition is set it needs to be modified in BIN TABLE page 4 3 1 Count...

Page 33: ... the following settings TRIG Trigger mode MODE Sweeping method RANGE Measurement range LOG data record 4 4 1 Sweep Trigger Mode TRIG The instrument sweeps according to the trigger mode The trigger mode usually uses manual triggering Therefore when entering the page trigger mode is set to manual by default and it is automatically swept once Table 4 12 Sweep trigger mode Trig Mode Function INT Inter...

Page 34: ...test MODE is set to SEQ step and TRIG is set to MAN manual the sweep function will automatically execute the first test step then stop and wait for the trigger button to execute the next step The instrument sweeps according to the trigger mode The trigger mode usually uses manual triggering Table 4 13 sweep method Soft key Function SEQ Trigger will scan all test points at a time STEP Trigger only ...

Page 35: ...creen Display page Step 1 Press the Meas key Step 2 Press the bottom soft key ENLARGE to switch to ENLARGE DISPLAY page To return back to the normal display page Step 1 Press NORMAL bottom soft key to return back to the MEAS DISPLAY page ...

Page 36: ... in progress These settings include the following parameters FUNC Measurement Function RANGE Impedance Range FREQ Measurement Frequency TRIG Trigger Mode LEVEL Measurement Level SPEED Measurement Speed SRC RES Source Output Impedance AVG Averaging Factor BIAS DC voltage bias MON 1 Monitor parameter 1 AUTO LCZ Automatic LCZ Function MON 2 Monitor parameters 2 DELAY Delay time after trigger and befo...

Page 37: ...esistance of KEYSIGHT s LCR meter e g E4980A is 100Ω Users who need to compare with such instruments need to change the internal resistance of the instrument to obtain data uniformity For non current sensitive especially low impedance test objects we recommend using 30Ω source internal resistance Procedure for setting source output impedance Step 1 Press the Setup key to enter MEAS SETUP page Step...

Page 38: ...Auto LCZ Function can help you to select a proper measurement parameter the best equivalent circuit mode if range is set to AUTO range the instrument is completely in the smart test state To set up the Auto LCZ Function Step 1 Press the Setup key to enter MEAS SETUP page Step 2 Use the cursor key to select AUTO LCZ field Step 3 Use the soft keys to turn on off the Auto LCZ Function Soft key Functi...

Page 39: ...The ALC function adjusts the voltage and current across the DUT to match the preset voltage and current values A constant level will be obtained on the device under test without being affected by source internal resistance Procedure for setting ALC Step 1 Press the Setup key to enter MEAS SETUP page Step 2 Use the cursor key to select ALC field Step 3 Use the soft keys to set constant level Soft k...

Page 40: ...alibration based on all frequency points This calibration provides full open and short circuit correction for all frequency points in the entire frequency range Based on the calibration of specified frequency point it supports open circuit correction short circuit correction and load calibration for 3 user point frequencies In CORRECTION page you can configure each of the following controls with t...

Page 41: ...rminals Step 4 After pressing OK the instrument starts to perform correction When correcting there will be a progress bar prompt at the bottom of the page and the Trig d indicator will flash After the correction is completed the progress bar disappears During correction users can cancel the correction at any time by pressing the Abort button 5 2 2 Short Correction SHORT The short correction featur...

Page 42: ...ristic frequency will be approximated to the typical frequency If the current frequency point is is turned off before Soft key Function ON Enable this frequency correction point CURRECT FREQ Specify the frequency being used as the current frequency spot value If the current frequency point is is turned on before Soft key Function OFF Disable this frequency correction point CURRECT FREQ Specify the...

Page 43: ...to a maximum of 10 bins BIN1 to BIN9 and OUT OF BIN using a maximum of nine pairs of primary parameter limits and one pair of secondary parameter limits In addition a device which primary parameter is within limits but secondary parameter is not can be sorted into an auxiliary bin AUX The comparator is allowed to be turned off Procedure for turning on off the comparator function COMP Step 1 Press ...

Page 44: ...value and relative value mode is called tolerance mode Its principle is as follows Figure 5 6 Tolerance mode Among them Nominal value The tolerance mode requires input of the nominal value Includes this point Excludes this point Absolute value measured value nominal value Percent measured value nominal value nominal value 100 Figure 5 7 Example of sorting in tolerance mode Includes this point Excl...

Page 45: ...ot affect sorting In sequential mode you can configure nominal value or not NOTE When using negative nominal values be sure to set the lower limit to a value higher than the upper limit because when they are converted to absolute values the lower limit becomes higher than the upper limit The nominal value entered corresponds to the primary parameter of the test Function To enter the nominal value ...

Page 46: ...key Function Total 1 bin Only 1 bin for OK bin Total 9 bins Turn on all 9 OK bins 5 3 8 Lower and Upper Limits Setup AT381x s built in comparator can sort DUTs into a maximum 10 bins using up to nine sets of primary parameter limits alone with one set of secondary parameter limits Please enter the absolute value of the primary parameter for the absolute value comparison mode the unit is the primar...

Page 47: ... the bin between bin is overlapped Please check the setting result carefully to prevent the sorting error 5 4 LIST TABLE Page Press the Setup key and press LIST TABLE soft key to open the LIST TABLE page The list sweep feature of AT381x can perform automatic or manual sweep measurement by sweeping the frequency signal level through a maximum 10 groups of frequencies or levels Before using list swe...

Page 48: ...ist sweep parameter 5 4 3 Configure the Sweep Points AT381x s List sweep measurement feature supports up to 10 sweep points as well as measurement limit values Each of sweep point can be turned on or off To configure the sweep points Step 1 Enter the LIST TABLE page Step 2 Use the cursor key to select any sweep point from 1 9 Step 3 Turn sweep points on or off or enter sweep point data frequency o...

Page 49: ...parameter A and secondary parameter B multiplex the same storage space to store upper and lower limits Procedures for setting Lower and Upper Limits Step 1 Enter the LIST TABLE page Step 2 Use the cursor key to select Lower and Upper Limits of any sweep point from 1 10 Note that the current sweep point needs to be turned on Step 3 Use the soft keys to select the unit NOTE The instrument prepares s...

Page 50: ...onfigured in the SYSTEM CONFIG page LANGUAGE System date and time configuration DATE TIME Account settings ACCOUNT Key Beep setting KEY BEEP Beep tone TONE RS 232 Baud rate setting BAUD Remote Communication PROTOCOL SCPI MODBUS SCPI TERMINATOR SCPI HAND SHAKE SCPI ERROR CODE SCPI RESULT upload DATA BUFFER Set the maximum cache value for the data logging function DEFAULT SET Restore to factory sett...

Page 51: ...es the month in steps of 1 DAY INCR Increases the day in steps of 1 DAY DECR Decreases the day in steps of 1 To change the time Step 1 Press the Meas or Setup key and then press SYSTEM TO enter SYSTEM CONFIG page Step 2 Use the cursor key to select TIME field Step 3 Use the soft keys to set time Soft key Function HOUR INCR Increases the hour in steps of 1 HOUR DECR Decreases the hour in steps of 1...

Page 52: ... or HIGH volume To set up the beep tone Step 1 Press the Meas or Setup key and then press SYSTEM TO enter SYSTEM CONFIG page Step 2 Use the cursor key to select TONE field Step 3 Use the soft keys to select Soft key Function HIGH Beep tone is set to high volume louder LOW Beep tone is set to low volume softer 6 1 6 RS 232 Baud Rate Setting BAUD The instrument has built in RS 232 interface After se...

Page 53: ...er SYSTEM CONFIG page Step 2 Use the cursor key to select PROTOCOL field Step 3 Use the soft keys to select Soft key Function SCPI ASCII transmission MODBUS RTU Binary transmission 6 1 8 SCPI TERMINATOR Setting The AT381x supports multiple terminators LF ASCII 0x0A CR ASCII 0x0D CR LF ASCII 0x0D 0x0A The host data received by the instrument may not use the terminator and the data sent by the instr...

Page 54: ...ution will return E00 correctly and the execution error will return an error code Table 6 1 SCPI error code Error code Description Explanation E00 NO ERROR No error E01 BAD COMMAND Command error E02 PARAMETER ERROR Parameter error E03 MISSING PARAMETER Missing parameters With parameter commands no parameters are provided E04 INPUT BUFFER OVERRUN Receive buffer overflow the maximum buffer of the AT...

Page 55: ...n ON The test result will be sent back after measuring NOTE This setting and function is valid only under the SCPI protocol 6 1 12 DATA BUFFER Set the maximum data buffer value for the data logging function The AT381x can set up to 10000 sets of buffer data After the cache setting value is reached the data record will stop This data can be saved into the external USB disk Please refer to the LOG f...

Page 56: ...ge users can set the following functions MEDIA selection internal memory or external USB memory AUTO RECALL Recall file 0 or last used file at boot AUTO SAVE on off Save the modified data to the current file automatic Soft key SAVE Save the current setting data to the current file immediately Soft key RECALL Load current file data into the system immediately Soft key ERASE Erase current file data ...

Page 57: ...f the AUTO SAVE function Step 1 Press the Meas or Setup key followed by FILE soft key at bottom and then enter FILE page Step 2 Use the cursor key to select AUTO SAVE field Step 3 Use the soft keys to select Soft key Function ON Auto save function will be enabled The data will be saved after the power key pressed OFF Turn off the auto save function 7 1 4 File operation To choose a file to operate ...

Page 58: ...interface the AT381x can easily perform automatic control functions with user system control components 8 1 Pin Assignment Figure 8 1 Pin Assignment Output Terminal All signals are valid low level Table 8 1 Description of Handler Interface Output Signals Pin Pin Name Signal Description Level State 1 O_BIN_1 BIN1 Output OK Active low 2 O_BIN_2 BIN2 Output OK Active low 3 O_BIN_3 BIN3 Output OK Acti...

Page 59: ...xternal power supply COM terminal 17 VCC External power supply VCC input 8 2 How to Connection Use external power supply recommended Please connect the external power supply to the following pins at the same time VCC Pin 17 GND Pin 16 17 Electrical Characteristics Power supply 12 4V 36VDC 0 2A minimum Output signal The collector output of the built in pull up resistor Optocoupler isolation Input s...

Page 60: ...ce Output signals sorting IDX EOM 1 2 4 3 R 4 99k EXT DC V OUTPUT GN D Maximum source current 5mA Maximum reverse current 50mA 8 3 Timing Chart Recommended signal input and output timing chart The AT381x completes one sampling and is completely controlled by an external device PLC etc Figure 8 4 Signal timing chart Table 8 4 Timing ...

Page 61: ...Time Description Minimum T1 Trigger pulse width 1ms T2 Measurement cycle Trigger delay time 10μs T3 ADC time Related to measurement speed T4 Operation time 1ms T5 Comparator result delay time 200μs T6 Await next trigger 0μs ...

Page 62: ... between computers and computers between computers and peripherals RS is the English abbreviation of Recommended Standard and 232 is the standard number The standard is officially published by the Electronic Industries Association EIA in 1969 It is required to transmit one bit at a time via one data line Most serial port configurations are usually not strictly based on the RS 232 standard 25 pin c...

Page 63: ...a serial interface of a controller eg PC or IP via a 2 3 crossed DB 9 cable 9 2 Protocol The AT381x supports two communication protocols SCPI and Modbus RTU 9 3 SCPI Protocol SCPI is the abbreviation of Standard Commands for Programmable Instruments SCPI The SCPI protocol defines a set of standard syntax and commands for controlling programmable test and measurement instruments SCPI commands are t...

Page 64: ...II code In fact for simple applications such as PLC you only need to translate the commands into HEX bytes and then transfer them in bytes 9 3 1 Modbus RTU Protocol The Modbus protocol is a general purpose language applied to electronic controllers and is mainly used for BUS protocols in industrial fields It is the communication standard for industrial control equipment such as PLC and touch scree...

Page 65: ...o returns ASCII code Command string that sent by host must be ended with LF CR LF CR mark instrument terminator will begin performing command string only after it receives end mark Instrument can set command handshake instrument will return an identification code after it receives command and finishes processing If the host cannot accept the data returned by the instrument you can try to solve it ...

Page 66: ... or after buffer overflows 3 If command handshake is turned on every time terminator receives one string it will promptly return this string to the host only when host receives this returned string can it continues sending the next string 4 After terminator parses error it will promptly stop parsing and the current command is canceled 5 When terminator parses the query command it will terminate pa...

Page 67: ...Header Parameter 10 4 1 Header Headers can be of the long form or the short form The long form allows easier understanding of the program code and the short form is suitable for writing 10 4 2 Parameter Single command word no parameter Example AAA BBB Parameter can be character string form the abbreviation rules are the same as the rules for command Example AAA BBB 1 23 Parameter can be numeric fo...

Page 68: ...for separate parameter Example AAA BBB 1 234 10 4 4 Error Code The AT381x temporarily stores the result of the processing of each received command in the buffer Before the next command is sent the status can be acquired by the ERR Command If the error code function is turned on in SYSTEM CONFIG page the instrument will automatically return the processing result after processing the command Table 1...

Page 69: ...ions E11 UNKNOWN ERROR Other unknown errors except the above errors 10 5 Command Reference DISPlay SUBSYSTEM FUNCtion SUBSYSTEM FREQuency SUBSYSTEM VOLTage SUBSYSTEM APERture SUBSYSTEM FETCh SUBSYSTEM COMParator SUBSYSTEM LIST SUBSYSTEM CORRection SUBSYSTEM TRIGger SUBSYSTEM BIAS SUBSYSTEM FILE SUBSYSTEM ERRor SUBSYSTEM Common commands TRG IDN SAV RCL 10 6 DISPlay Subsystem The DISP Subsystem comm...

Page 70: ...play page to BIN COUNT LISTMEAS or LIST Sets display page to LIST MEAS SETUP or MSET Sets display page to MEAS SETUP CORRECTION or CSET Sets display page to CORRECTION BINSETUP or BSET Sets display page to BIN TABLE LISTSETUP or LSET Sets display page to LIST TABLE CATalog or CAT Sets display page to FILE SYSTem or SYST Sets display page to SYSTEM CONFIG SYSTEMINFO or SINF Sets display page to SYS...

Page 71: ... R X G B Y on off nom MONitor2 AUTO on off 1 0 10 7 1 FUNCtion The FUNCtion command sets the measurement function Command Syntax FUNC function Parameter Where function is Cs Rs Cs D Cp Rp Cp D Lp Rp Lp Q Ls Rs Ls Q Rs Q Rp Q R X DCR Z θr or Z thr 1 Z θd Z thd 1 Z D Z Q 1 θ is ASCII Hex 0xE9 Example SEND FUNC Cp D Set measurement function to Cp D Query Syntax FUNC Query Response function Example SE...

Page 72: ...END FUNC DCR RANG 2 Set DCR range to 2 10kΩ Query Syntax FUNC DCR RANGe Query Response 0 8 Example SEND FUNC DCR RANG RET 0 10 7 5 FUNCtion RANGe AUTO The FUNCtion RANGe AUTO command sets the auto range to ON or OFF Command Syntax FUNC RANGe AUTO off hold on auto NOMinal Parameter Where off hold on auto NOMinal is off or hold Sets the auto range to off on or auto Sets the auto range to on NOMinal ...

Page 73: ...teger NR2 fix float or NR3 floating point MIN Sets to the minimum value MAXSets to the maximum value Example SEND FREQ 1K Set to 1kHz the Hz cannot be added Query Syntax FREQ CW Query Response NR3 NR3 floating point Example SEND FREQ RET 1 000000E 03 Note A suffix multiplier k can be used with this command But the suffix unit Hz can t be used This command CANNOT be used in LIST SWEEP DISPLAY page ...

Page 74: ... CURRent value MIN MAX or CURRent LEVel value MIN MAX Parameter Where value is the numeric data NR1 NR2 or NR3 MIN Sets to the minimum value of current MAXSets to the maximum value of current Example SEND LEV CURR 1m Set to 1mA unit V can be ignored Query Syntax LEVel CURRent or CURRent LEVel Query Response NR3 NR3 floating point Example SEND VOLT RET 1 000000e 00 Note The suffix unit V can t be i...

Page 75: ... LIST MEAS page CORRECTION page and DCR mode 10 10 APERture Subsystem The APERture subsystem command sets the integration time of the ADC and the averaging rate Figure 10 5 APERture Subsystem Command Tree APERture SLOW MED FAST averaging rate value NR1 Command Syntax APERture SLOW MED FAST APERture value SPEED spd SLOW MED FAST SPEED spd value Parameter Where SLOW Set test speed to slow MED Set te...

Page 76: ...easurement data of the primary secondary parameters and comparator result into the output buffer Query Syntax FETCh Query Response NR3 primary value NR3 secondary value comparator result Example SEND FETC RET 2 617886e 11 5 454426e 01 BIN1 AUX OK OK RET 1 23434e 05 OUT NG DCR Comp on 10 11 2 FETCh IMPedance The FETCh IMPedance query sets the latest measurement data of the primary secondary paramet...

Page 77: ...MONitor2 Query Response NR3 moniter1 2 value Example SEND FETC MON1 RET 3 886517e 05 RET 0 000000e 00 0 The monitor 1 is OFF 10 11 5 FETCh MONitor The FETCh MONitor set the latest measurement data of the moniter1 and moniter2 parameters into the output buffer Query Syntax FETCh MONitor Query Response NR3 moniter1 2 value Example SEND FETC MON RET 3 886517e 05 0 000000e 00 0 The monitor 2 is OFF 10...

Page 78: ...ere ON or 1 Sets the comparator to ON OFF or 0 Sets the comparator to OFF Example SEND COMP STAT OFF Query Syntax COMParator STATe Query Response on off Example SEND COMP STAT RET on 10 12 2 COMParator MODE The COMParator MODE command sets the limit mode of the comparator function Command Syntax COMParator MODE ABS PER SEQ Parameter Where ABS PER SEQ is ABS Absolute tolerance mode PER Percent tole...

Page 79: ...e COMParator TOLerance NOMinal command sets the nominal value for the tolerance mode of the comparator function Command Syntax COMParator TOLerance NOMinal value Parameter Where value is NR1 NR2 or NR3 A suffix multiplier can be used with this command But the suffix unit F Ω H can t be used Example SEND COMP TOL NOM 100N SEND COMP TOL NOM 1E 6 Query Syntax COMParator TOLerance NOMinal Query Respon...

Page 80: ...rator SLIM COMParator secondary Query Response NR3 low limit NR3 high limit Example SEND COMP SLIM RET 1 000000e 04 1 000000e 03 10 12 8 COMParator BEEP The COMParator BEEP command sets beep mode of the comparator function Command Syntax COMParator BEEP OFF PASS FAIL Parameter Where OFF Turns the beeper off PASS Sounds a beep when the test is passed BIN1 BIN9 FAIL Sounds a beep when the test is fa...

Page 81: ...ency VOLT Sets the sweep parameter to voltage level CURR Sets the sweep parameter to current level Example SEND LIST PARA VOLT Query Syntax LIST PARAmeter Query Response FREQ VOLT CURR Example SEND LIST PARA RET FREQ 10 13 2 LIST STAT The LIST STAT command turns on off the specified sweep point Command Syntax LIST STAT n ON OFF 1 0 Parameter Where n is n NR1 1 to 10 List sweep point ON or 1 Set th...

Page 82: ...r NR3 high limit value Note The suffix multipliers can be used with this command But the suffix units CANNOT be added Example SEND LIST BAND 1 1k A 1n 2n SEND LIST BAND 2 10k A 1E 9 2E 9 Query Syntax LIST BAND n Parameter Where n is n NR1 1 to 10 List sweep point Query Response on off point value A B NR3 low NR4 high Example SEND LIST BAND 1 RET on 1 00000e 03 A 1 000000E 9 2 000000E 9 10 14 CORRe...

Page 83: ...ement points Command Syntax CORRection OPEN Example SEND CORRection OPEN 10 14 1 1 CORRection OPEN STATe The CORRection OPEN STATe command sets the OPEN correction function to ON or OFF Command Syntax CORRection OPEN STATe ON OFF 1 0 Parameter Where ON OFF 1 0 is ON 1 When the function is ON OFF 0 When the function is OFF Example SEND CORR OPEN STATe ON RET open Query Syntax CORRection OPEN STATe ...

Page 84: ... CORRection SPOT FREQuency command sets the frequency point for the specified frequency point correction Command Syntax CORRection SPOT FREQuendy value Parameter Where value is value NR1 NR2 or NR3 Frequecny value A suffix multiplier can be used with this command But the unit Hz cannot be added Example SEND CORR SPOT FREQ 1k SEND CORR SPOT FREQ 10k Query Syntax CORRection SPOT FREQuency Query Resp...

Page 85: ...ote This command can be ONLY used in BUS trigger mode 10 15 2 TRIGger SOURce The TRIGger SOURce command sets the trigger mode Command Syntax TRIGger SOURce INT MAN EXT BUS Parameter Where INT MAN EXT BUS is INT Internal Trigger Mode MAN Manual Trigger Mode EXT External Trigger Mode BUS BUS Trigger Mode Example SEND TRIG SOUR BUS Query Syntax TRIGger SOURce Query Response INT MAN EXT BUS Example SE...

Page 86: ...ax BIAS Query Response 2 50V 2 50V Example SEND BIAS RET OFF 10 17 FILE Subsystem The FILE subsystem command group executes the file operation Figure 10 12 FILE Subsystem Command Tree FILE SAVE LOAD File No File No DELete File No 10 17 1 FILE The FILE query returns the file number used by system Query Syntax FILE Query Response NR1 0 TO 9 File number Example SEND FILE RET 0 10 17 2 FILE SAVE The F...

Page 87: ...E DELete Command Syntax FILE DELete File No Parameter Where File No is NR1 0 to 9 Example SEND FILE DELete 10 18 ERRor Subsystem 10 18 1 ERRor The ERRor retrieves last error information Query Syntax ERRor Query Response Error string Example SEND ERR RET no error 10 19 SYSTEM Subsystem 10 19 1 SYSTem SHAKehand The SYSTem SHAKehand command feeds back the sent commands Command Syntax SYSTem SHAKehand...

Page 88: ...s will be sent back by one trig Query Syntax SYSTem RESult Query Response FETCH AUTO Example SEND SYST RES RET fetch 10 20 Common Commands 10 20 1 IDN The IDN query returns the instrument ID Query Syntax IDN Or IDN Query Response manufacturer model serial no fireware 10 20 2 TRG The TRG command trigger command performs the same function as the Group Execute Trigger command Command Syntax TRG Query...

Page 89: ...89 SCPI Command Reference 10 20 4 RCL RCL FILE LOAD The RCL command recalls all user settings from current used file Command Syntax RCL Example SEND RCL ...

Page 90: ... into Modbus floating point format 11 1 1 Command Frame Figure 11 1 Modbus Command Frame Table 11 1 Command Frame Description At least 3 5 character time squelch interval is requested Station address 1 byte Modbus can support 00 0x63 stations Designated as 00 when unified broadcast In instruments that do not have an optional RS485 the default station address is 0x01 Function code 1 byte 0x03 Read ...

Page 91: ...B language Function CRC16 data As Byte As Byte Dim CRC16Lo As Byte CRC16Hi As Byte CRC register Dim CL As Byte CH As Byte Polynomial code HA001 Dim SaveHi As Byte SaveLo As Byte Dim i As Integer Dim flag As Integer CRC16Lo HFF CRC16Hi HFF CL H1 CH HA0 For i 0 To UBound data CRC16Lo CRC16Lo Xor data i Each data is XORed with the CRC register For flag 0 To 7 SaveHi CRC16Hi SaveLo CRC16Lo CRC16Hi CRC...

Page 92: ...x80 for example 0x03 OR 0x80 0x83 Error code Exception code 0x01 function code error function code is not supported 0x02 register error register does not exist 0x03 data error 0x04 execution error CRC 16 2 bytes low in front Cyclic Redundancy Check Calculate all data from the station address to the end of the data to get the CRC16 check code 11 1 4 No Response In the following cases the instrument...

Page 93: ...iption 0x03 Read multiple registers Read multiple consecutive register data 0x04 Same as 0x03 Please use 0x03 instead 0x08 Echo test The received data is returned as it was 0x10 Write to multiple registers Write to multiple consecutive registers 11 3 Register The number of registers in the instrument is 2 byte mode that is 2 bytes must be written each time For example the speed register is 0x3002 ...

Page 94: ...resses arevalid otherwise an error frame will be returned CRC 16 Check code Figure 11 6 Read Multiple Registers 0x03 Response Frame Name Name Description Station address Returned as it was 0x03 Or 0x83 Function code No abnormality 0x03 Error code 0x83 Number of bytes number of registers x 2 For example 1 register returns 02 Data Data Read CRC 16 Check code 11 5 Writing to Multiple Registers Figure...

Page 95: ... of registers x 2 CRC 16 Data Figure 11 8 Write to Multiple Registers 0x03 Response Frame Name Name Description Station address Returned as it was 0x10 Or 0x90 Function code No abnormality 0x10 Error code 0x90 Starting address Number of write registers 0001 0068 104 CRC 16 Check code 11 6 Echo Test echo test function code 0x08 used for debug Modbus Figure 11 9 echo test 0x08 Name Name Description ...

Page 96: ...AT381x User s Guide 96 Test data Any value for example 12 34 CRC 16 Check code Example Assume that the test data is 0x1234 ...

Page 97: ...ddresses used by the AT381x Any address not in the table will return error code 0x02 Table 12 1 Register Overview Register address Name Value Description 2000 2001 Read the primary parameter measurement result 4 byte floating point number Read only register data occupies 2 registers 2002 2003 Read the secondary parameter measurement result 4 byte floating point number Read only register data occup...

Page 98: ...loating point number Read and write registers data occupies 2 registers 3008 3009 Test level 4 byte floating point number Read and write registers data occupies 2 registers 300A DCR range No 0000 0008 Read and write registers 2 byte integer 300C Recall at startup 0000 File 0 0001 Current file Read and write registers 2 byte integer 300D Auto save 0000 Disable 0001 Allow Read and write registers 2 ...

Page 99: ...4 Primary parameter BIN2 lower limit value 4 byte floating point number Read and write registers data occupies 2 registers 3116 Primary parameter BIN2 higher limit value 4 byte floating point number Read and write registers data occupies 2 registers 3118 Primary parameter BIN3 lower limit value 4 byte floating point number Read and write registers data occupies 2 registers 311A Primary parameter B...

Page 100: ...ecified file data 0000 0009 Write only register data 2 bytes 5000 Open circuit full frequency clear register Read correction status Write a fixed value 0001 Read 0001 in correcting 0000 correction success FFFF correction fail Read and write registers data occupies 1 register Once the correction function is executed Modbus will disable the execution of the write command and only allow the register ...

Page 101: ...a 12 2 1 Fetch measurement data 2000H 2003H Register 2000 2003 is used for fetching measurement data of the AT381x Command 1 2 3 4 5 6 7 8 01 03 2000 0002 CRC 16 passive station read register number of registers check code Response 1 2 3 4 5 6 7 8 9 01 03 byte single precision floating point number CRC 16 Obtain the primary parameter measurement result Send 1 2 3 4 5 6 7 8 01 03 20 00 00 02 CF CB ...

Page 102: ...BIT7 total GD bin 1 primary and secondary parameter GD 0 Total NG BIT3 BIT0 GD bin 1 9 GD 0 NG Send 1 2 3 4 5 6 7 8 01 03 20 04 00 01 CE 0B passive station read register number of registers check code Response 1 2 3 4 5 6 7 01 03 02 00 01 E0 E5 Example Data 01 81 BIT8 1 secondary parameter NG BIT7 1 Total NG BIT3 BIT0 1 primary parameter GD bin BIN1 Data 00 01 BIT8 0 secondary parameter GD BIT7 0 ...

Page 103: ... 10 30 00 00 01 AF 09 register number of registers CRC Read 1 2 3 4 5 6 7 8 01 03 30 00 00 01 8B 0A read register number of registers CRC Response 1 2 3 4 5 6 7 01 03 02 00 08 B9 82 byte data CRC Data values Data Function 0000 Cs Rs 0001 Cs D 0002 Cp Rp 0003 Cp D 0004 Lp Rp 0005 Lp Q 0006 Ls Rs 0007 Ls Q 0008 Rs Q 0009 Rp Q 000A R X 000B DCR 000C Z r 000D Z d 000E Z D 000F Z Q 12 3 2 LCR Range Reg...

Page 104: ...4 5 6 7 01 03 02 00 01 79 84 byte data CRC Data values Data Function Description 0000 Range 0 100kΩ 0001 Range 1 30kΩ 0002 Range 2 10kΩ 0003 Range 3 3kΩ 0004 Range 4 1kΩ 0005 Range 5 300Ω 0006 Range 6 100Ω 0007 Range 7 30Ω 0008 Range 8 10Ω 12 3 3 Range Mode Register 3002H Write 1 2 3 4 5 6 7 8 9 10 11 01 10 30 02 00 01 02 00 01 56 71 write register number of registers byte data CRC Response 1 2 3 ...

Page 105: ... 10 11 01 10 30 03 00 01 02 00 01 57 A0 write register number of registers byte data CRC Response 1 2 3 4 5 6 7 8 01 10 30 03 00 01 FE C9 register number of registers CRC Read 1 2 3 4 5 6 7 8 01 03 30 03 00 01 7B 0A read register number of registers CRC Response 1 2 3 4 5 6 7 01 03 02 00 01 79 84 byte data CRC Data values Data Function Description 0000 Slow speed 0001 Invalid This value is reserve...

Page 106: ...te data CRC Data values Data Function Description 0001 0100 average value 0 256 average value 0 average value 1 12 3 6 Trigger Mode Register 3005H Write 1 2 3 4 5 6 7 8 9 10 11 01 10 30 05 00 01 02 00 02 17 C7 write register number of registers byte data CRC Response 1 2 3 4 5 6 7 8 01 10 30 05 00 01 1E C8 register number of registers CRC Read 1 2 3 4 5 6 7 8 01 03 30 05 00 01 9B 0B read register ...

Page 107: ... 8 01 10 30 06 00 02 AE C9 register number of registers CRC Read 1 2 3 4 5 6 7 8 01 03 30 06 00 02 CF 1A read register number of registers CRC Response 1 2 3 4 7 8 9 01 03 04 44 7A 00 00 CF 1A byte data CRC 12 3 8 Level Register 3008H 3009H Write 1V 1 00 3F 80 00 00 1 2 3 4 5 6 7 8 11 12 13 01 10 30 08 00 02 04 3F 80 00 00 EB B4 write register number of registers byte data CRC Response 1 2 3 4 5 6...

Page 108: ... 01 10 30 0A 00 01 02 00 01 97 3A write register number of registers byte data CRC Response 1 2 3 4 5 6 7 8 01 10 30 0A 00 01 2E CB register number of registers CRC Read 1 2 3 4 5 6 7 8 01 03 30 0A 00 01 AB 08 read register number of registers CRC Response 1 2 3 4 5 6 7 01 03 02 00 04 B9 87 byte data CRC Data values Data Function Description 0000 Range 0 100kΩ 0001 Range 1 30kΩ 0002 Range 2 10kΩ 0...

Page 109: ...sponse 1 2 3 4 5 6 7 01 03 02 00 01 79 84 byte data CRC Data values Data Function Description 0000 File 0 Default setting 0001 Current file 12 3 11 Auto Save 300DH Write 1 2 3 4 5 6 7 8 9 10 11 01 10 30 0D 00 01 02 00 01 56 8E write register number of registers byte data CRC Response 1 2 3 4 5 6 7 8 01 10 30 0D 00 01 9F 0A register number of registers CRC Read 1 2 3 4 5 6 7 8 01 03 30 0D 00 01 79 ...

Page 110: ... 0E 00 01 EA C9 read register number of registers CRC Response 1 2 3 4 5 6 7 01 03 02 00 01 79 84 byte data CRC Data values Data Function Description 0000 English 0001 Chinese 12 3 13 Test Current Register 3010H 3011H Write 1mA 0 001 3A 83 12 6F 1 2 3 4 5 6 7 8 11 12 13 01 10 30 10 00 02 04 3A 83 12 6F 17 1E write register number of registers byte Data 1mA CRC Response 1 2 3 4 5 6 7 8 01 10 30 10 ...

Page 111: ... page Error in operation Level is voltage state Error in operation Function DCR Error in operation Note The current level is not current mode or an operation error is returned when the measurement parameter is DCR 12 3 14 DC Bias Register 3012H 3013H Write 1V 3F 80 00 00 1 2 3 4 5 6 7 8 11 12 13 01 10 30 12 00 02 04 3F 80 00 00 2A 87 write register number of registers byte data 1V CRC Response 1 2...

Page 112: ... Read 1 2 3 4 5 6 7 8 01 03 31 00 00 01 8A F6 read register number of registers CRC Response 1 2 3 4 5 6 7 01 03 02 00 01 79 84 byte data CRC Data values Data Function Description 0000 Comparator off Default setting 0001 Comparator on 12 4 2 Comparator Mode Register 3101H Write 1 2 3 4 5 6 7 8 9 10 11 01 10 31 01 00 01 02 00 01 46 82 write register number of registers byte data CRC Response 1 2 3 ...

Page 113: ...1 01 10 31 02 00 01 02 00 01 46 B1 write register number of registers byte data CRC Response 1 2 3 4 5 6 7 8 01 10 31 02 00 01 AE F5 register number of registers CRC Read 1 2 3 4 5 6 7 8 01 03 31 02 00 01 2B 36 read register number of registers CRC Response 1 2 3 4 5 6 7 01 03 02 00 01 79 84 byte data CRC Data values Data Function Description 0000 Secondary parameter comparison off AUX OFF 0001 Se...

Page 114: ...CRC Data values Data Function Description 0000 Invalid 0001 0009 Bin count 12 4 5 Beep Register 3104H Write 1 2 3 4 5 6 7 8 9 10 11 01 10 31 04 00 01 02 00 01 46 D7 write register number of registers byte data CRC Response 1 2 3 4 5 6 7 8 01 10 31 04 00 01 4E F4 register number of registers CRC Read 1 2 3 4 5 6 7 8 01 03 31 04 00 01 CB 37 read register number of registers CRC Response 1 2 3 4 5 6 ...

Page 115: ...4 5 6 7 8 01 03 31 0A 00 02 EA F5 read register number of registers CRC Response 1 2 3 4 5 6 7 8 9 01 03 04 33 D6 BF 95 A4 D0 byte data 100E 9 CRC 12 4 7 Secondary Parameter Limit Value Register 310CH 310FH The secondary parameter limit value starts from 310C the lower limit uses 2 registers and the upper limit uses 2 registers total of 4 registers The lower and upper limits can be set separately ...

Page 116: ...01 03 31 10 C1 20 00 00 41 20 00 00 6C7F Lower limit Upper limit 12 5 File Operation Since the AT381x settings are stored in the file after the Modbus command is set the data cannot be stored in the internal FlashRom in real time which will cause the register data before the next power on to be restored to the original file value Users can store all set values in the current or specified file with...

Page 117: ...e data CRC Response 1 2 3 4 5 6 7 8 01 10 40 00 00 01 95 CB register number of registers CRC Data values Data Function Description 0000 0009 File 0 9 12 5 3 Reloading the Current File 4010H The fixed value 0001 to 4010 registers are sent and the AT381x loads the current file data into the system This register cannot be read Write 1 2 3 4 5 6 7 8 9 10 11 01 10 40 10 00 01 02 00 01 24 C4 write regis...

Page 118: ...009 File 0 9 12 6 Correction 12 6 1 Full frequency Open Circuit Correction 5000H Writing 0001 to Register 5000 will cause the AT381x to begin an open circuit full frequency correction Since the correction process takes a few seconds during this time any write operation will be ignored and only the read operation will be open After the correction is completed the write command is normally opened Co...

Page 119: ...y write operation will be ignored and only the read operation will be open After the correction is completed the write command is normally opened Correction status can be obtained by reading the 5008 register during correction execution or after correction 0000 Correction success FFFF Correction fail 0001 In correction Write Please write a fixed value to the 5008 register 00 01 Send 01 10 5008 000...

Page 120: ...ead register number of registers CRC Response 1 2 3 4 5 6 7 8 9 01 03 04 44 7A 00 00 CF 1A byte data 1000 CRC 12 6 4 Spot Frequency Open Circuit Correction 5020H By writing the point frequency 0001 0003 to the register 5020 the AT381x will begin to perform an open circuit point frequency correction After clearing is complete you can get the clear status by reading the 5008 register 0000 Correction...

Page 121: ...ing point frequency short circuit correction Send 01 10 5028 0001 02 0001 31BD Response 01 10 5028 0001 90C1 Read During the execution of correction can determine whether correction is completed by reading the register data Send 01 03 5028 0001 1502 Response 01 03 02 FFFF B9F4 Returns FFFF indicating that the correction failed Note It takes time to perform correction of the point frequency Please ...

Page 122: ...Z Ae are expressed by the following formula Ae A Ka Kb 100 Kc A Basic measurement accuracy Ka Impedance scale factor Kb Impedance scale factor Kc Temperature factor L C Accuracy conditions Dx D measuring value 0 1 R Accuracy conditions Qx Q measuring value 0 1 When Dx 0 1 for L C accuracy factor Ae should be multiplied by 2 1 x D When Qx 0 1 for R accuracy factor Ae should be multiplied by 2 1 x Q...

Page 123: ...mula Rp e x e px D D D R Ω Here Rpx is the measured Rp value S Dx is the measured D value F De is accuracy of D 13 1 6 Rs Accuracy When Dx measured D value 0 1 Rs accuracy are given by the following formula Rse Xx De Ω Xx 2πfLx x fC π 2 1 Here Xx is the measured X value S Cx is the measured C value F Lx is the measured L value H De is accuracy of D F is test frequency 13 2 Accuracy Factor Figure 1...

Page 124: ...n the boundary line The basic accuracy A value selection method is as follows 0 05 When 0 4Vrms Vs 1 2Vrms the measurement speed is medium speed slow speed A value 0 1 When 0 4Vrms Vs 1 2Vrms the measurement speed is A value of medium speed and fast speed When Vs 0 4Vrms or Vs 1 2Vrms A value is calculated as selected A according to the current measurement speed and then the accuracy correction co...

Page 125: ...10 3 9 s m V Z Fast fm 10 0Hz 100 1 400 1 10 5 2 3 m s m f V Z 100 1 100 1 10 2 9 m s m f V Z 100H z fm 100 kHz 400 1 10 5 2 3 s m V Z 100 1 10 2 9 s m V Z fm 1 00kH z 400 2 10 5 2 3 s m V Z 100 1 10 6 9 s m V Z In this table fm test frequency Hz Zm impedance of the device under test Vs test signal voltage mVrms When the impedance is 500Ω Ka is used Kb is invalid When the impedance is 500Ω Kb is u...

Page 126: ...ange works at AUTO to select the correct measurement range This test is only included in the test of main specifications Other parameters not listed users can test under the specified conditions according to the specifications listed in this manual If the test result is found to beyond scope please contact our maintenance department immediately for repair 13 3 1 Devices and Equipment Used for Perf...

Page 127: ...100kHz test separately Level 1V Range AUTO Speed Slow Short circuit and open circuit correction should be performed before testing Connect standard capacitors 100pF 1000pF 10000pF 10nF 0 1uF 1uF change the frequency the error capacitance C between the instrument reading and the standard value should be within the allowable error range specified in 6 1 and the loss D should be allowed in 6 1 Within...

Page 128: ...User s Guide 128 standard resistors 10Ω 100Ω 1kΩ 10kΩ 100kΩ change the frequency and the error between the instrument reading and the standard value should be within the allowable error range specified in 6 1 ...

Page 129: ...ocedure The following flow chart shows the basic procedures used to measure the impedance of capacitors inductors resistors and other components Follow the procedures to perform impedance measurements while referring to the items noted to the right side of each step Figure 14 1 Measurement flow chart Start Setup measurement conditions FUNC LEVEL FREQ END Connect the text fixture Setup the correcti...

Page 130: ... Setup key Press Setup key to enter CORRECTION page Move to the OPEN field by using the cursor keys Set Open to On Don t connect any DUT to ATL601 as shown like this Press the Open Full Correction button until the progress box reaches 100 and disappears automatically The word Calibration finished is displayed at the bottom of the screen Move to the SHORT field by using the cursor keys Set Short to...

Page 131: ...131 Examples Step 7 View test results Figure 14 2 Capacitor test results ...

Page 132: ...s Rs Ls Q Rs Q Rp Q R X DCR Z θr Z θd Z D Z Q Monitor Parameter 2 sets Z D Q Vac Iac Δ Δ θr θd R X G B Y Basic Accuracy AT3818 AT3816A AT3817A AT3810A 0 05 within basic range Test Frequency AT3818 10Hz 300kHz continuous test frequency AT3816A 50Hz 200kHz continuous test frequency AT3816B 50Hz 200kHz 37 points AT3817A 50Hz 100kHz continuous test frequency AT3810A 10Hz 20kHz continuous test frequenc...

Page 133: ...0 00001Ω 99 9999MΩ B G 0 01nS 999 999S D 0 00001 9 99999 Q 0 00001 99999 9 θd 179 999 179 999 θr 3 14159 3 14159 999 999 999 999 θd 179 99 179 99 θr 3 1416 3 1416 99 999 999 99 Measurement Speed Fast 40 times s Medium 10 times s Slow 3 times s Output Impedance 30Ω 50Ω and100Ω Max Reading 999999 Ranging Auto Hold and Nominal range Equivalent Circuit Series and Parallel DC bias 2 50V 2 50V Correctio...

Page 134: ...x User s Guide 134 Power Supply 90V 260VAC 50Hz 60Hz Fuse 250V 3A Slow Blow Maximum rated power 15VA Weight 3 5kg net 15 2 Dimensions Dimensions AT381x User s Guide English 2005 2019 Applent Instruments Ltd ...

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