AccuEnergy AcuDC 240 Series User Manual Download Page 47

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Table 4.9 depicts the response of V=402851D8H(2.6299953V).

Addr

Fun

Byte count

Data1

Data2

CRC16 hi

CRC16 lo

01H

03H

04H

40H

31H

Table 4-9 Response frame of reading voltage

4. Control Relay Output (Function Code 05)

Query

This query frame forces the relay status to ON or OFF. AcuDC 240 relay output address
starts from 0000H(Relay1=0000H,Relay2=0001H).

Data FF00H changes the relay status to ON, data 0000H changes the relay status to OFF.
The relay will not be influenced by any other data input

The following is to query slave device 1 to set relay status as ON.

Addr Fun

Do addr hi

Do addr lo

Value hi

Value lo

CRC16 hi

CRC16 lo

01H

05H

00H

FFH

00H

8CH

3AH

Table 4-10 Control relay status query frame

Response

The correct response to this request is to send back the received data after the relay status
is changed.

Addr Fun

Do addr hi

Do addr lo

Value hi

Value lo

CRC16 hi

CRC16 lo

01H

05H

00H

FFH

00H

8CH

3AH

Table 4-11 Control relay status response frame

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Summary of Contents for AcuDC 240 Series

Page 1: ...AcuDC 240 Series Power Meter User s Manual www com information itm com 1 800 561 8187...

Page 2: ...rning of danger or risk during the installation and operation of the meters Electric Shock Symbol Carries information about procedures which must be fol lowed to reduce the risk of electric shock and...

Page 3: ...1 Display Panel and Keys 24 3 2 Metering Data 25 3 3 System Parameter Settings 28 3 4 I O Parameter Settings 32 3 5 Meter Information Display 38 Chapter 4 Communications 41 4 1 Modbus RTU Protocol 42...

Page 4: ...to the meter 5 Product Disk containing User s Manual and Warranty Card x1 User s manual contents Chapter 1 Introduces the basic AcuDC 240 features and applications Chapter 2 Provides details on how to...

Page 5: ...n or removal quick and convenient User Friendly Interface AcuDC 240 series utilizes a clear high definition LCD screen with large characters The LCD screen comes with a brightness adjustable backlight...

Page 6: ...uDC 241 is a voltage meter only monitors voltage AcuDC 242 is a current meter only monitors current AcuDC 240 is a multifunction meter monitors voltage current power and energy Category Function DC241...

Page 7: ...l Display Large LCD display Key Two keys are used to select display and set Voltage Input Terminals Used for voltage input Communication Terminals Communication output IO Module Optional IO module IO...

Page 8: ...needed please contact Accuenergy Please note it can influence the meter life negatively if the meter operates in extremly high or extremly low temperature environments AcuDC 240 storage temperature ra...

Page 9: ...240 series power meter is generally installed into the switchboard panel 1 Cut a square hole standard DIN See Figure 2 3 for dimensions Unit mm 2 Remove the clips from the meter and insert the meter i...

Page 10: ...Terminal Strips There are 3 groups of current terminal strips There will be another terminal strip if the me ter is connected with the I O module Voltage Current terminal strip Figure 2 5 Install the...

Page 11: ...s user s manual FIgure 2 7 Grouding Sign I O terminal strip 2DI 2AO I O terminal strip 2DI 2RO 2DO 17 18 19 DI11 DI12 DI21 20 21 22 DI22 AO1 AO1 23 24 AO2 AO2 Communicaton terminal strip Comm Port 14...

Page 12: ...2 8 Power Supply Wiring The independent power supply circuit loop must have a fuse or air circuit breaker The fuse could be 1A 250Vac time delay type If circuit breaker is used a CE certified product...

Page 13: ...oltage input options Direct Input and Via Hall Sensor The wire size for the voltage input is AWG16 22 or 0 6 1 5mm2 Please see the wiring diagrams for details Voltage Wiring Two ways Direct Input and...

Page 14: ...sing Current Hall Effect Sensor Load AcuDC 240 Current Hall Effect Sensor Vdc Vdc 6 5 I I Output External DC Power Current Input Current Wiring Three ways Direct Input Via Shunt Via Hall Effect Sensor...

Page 15: ...14 When voltage and current are wired at the same time www com information itm com 1 800 561 8187...

Page 16: ...240 works as Slave device Maser device can be PC PLC Data Acquisition Device or RTU In order to improve communcation quality please pay attention to the following A high quality Shielded Twisted Pair...

Page 17: ...low state When the Switch is closed there is current flow in the diode side the triode is on OUT is in high state In this way the high and low state of OUT correspondes to closed and open state of the...

Page 18: ...can be configured via our software 1 Select AO parameter 2 Set AO upper and lower limits For voltage it can be set as 0 100 For current and power it can be set as 0 100 0 100 100 100 and 0 100 Selecti...

Page 19: ...alue Full Range Value Lower Limit Upper Limit 100 Lower Limit Measured Value Full Range Value Lower Limit Upper Limit 100 Lower Limit Measured Value Full Range Value Lower Limit Upper Limit 5V 0 5V AO...

Page 20: ...is 10A AO is 3 AO is current type Set AO parameter as Current Upper Limit is 100 Lower Limit is 0 Full Range Value is 20A When the Measured Value is 10A AO is V 5 2 5 0 100 0 100 600 300 5 100 AO Meas...

Page 21: ...will be 0V 1V or 0mA 4mA When the Measured Value is out of the Upper Limit AO will be larger than 5V 20mA but the maximum will be 6V 5 8V or 23 2mA 24mA Relay Output AcuDC 240 series IO option has tw...

Page 22: ...larming function When the monitored param eter goes beyond below the preset limit and stays at the level over the preset amount of time delay the over under limit alarm will be triggered RO1 and RO2 c...

Page 23: ...1 Set RO1 as alarm mode set RO1 mode as 2 2 Select alarm parameter as current set alarm parameter code as 2 3 Set alarm inequality as larger than set the inequality sign as 1 4 Set the alarm threshol...

Page 24: ...tering data and setting parameters using different key combinations 3 1 Display Panel and Keys The front of the AcuDC 240 series meter consists of an LCD screen and two control keys All display segmen...

Page 25: ...t and response received 4 Settings Mode Indicates the meter is in Settings Mode Table 3 1 LCD Display There are two keys on the front panel marked as F key and V A key Use these two keys to display di...

Page 26: ...e current and power The first line displays voltage the second line diplays current the third line displays power U 220 2V I 49 99A P 11KW Communication status is active Note Communication status is d...

Page 27: ...3rd screen 3rd screen Total Energy E_total 93 90kWh Press V A to scroll to the 4th screen 4th screen Net Energy E_net 47 74kWh Press V A to scroll to return to the 1st screen Figure 3 5 Import Energy...

Page 28: ...settings mode via pressing F and V A the first screen is device address screen As the left figure shows the current device address is 1 After 1 second the screen will scroll to the password screen Pa...

Page 29: ...indicates the baud rate is 19200 bps Baud rate editing is not by digit simply press F key to select the desired baud rate Press V A to go to the next screen Note Only meters with communication options...

Page 30: ...hunt has this screen 6th screen current hall effect sensor setting Two modes 0 0 5V 4 20mA 1 0 4V 4 12 20mA Press F key to select Press V A to go to the next screen Note only the current wiring via cu...

Page 31: ...een backlight brightness setting 5 levels of backlight brightness 1 is minimum light level 5 is maximum light level Press F key to select Press V A to go to the next screen 11th screen password settin...

Page 32: ...simultaneously will exit I O parameter settings mode and return to the system parameter settings mode I O module has two types AO type and RO type For AO type module it offers two channel AO which can...

Page 33: ...oving the cursor to the digit Press F and V A to edit the vaule Press V A at the last digit to confirm and go to the next screen The figure shows the lower limit is 0 3rd screen AO1 upper limit settin...

Page 34: ...limit setting Except 100 100 all the other upper limit cannot be smaller or equal to the lower limit There is no sign digit when AO2 is set as voltage Press F and V A to edit the vaule Press V A to co...

Page 35: ...next screen 3rd scrreen RO1 alarm parameter when RO is set as Alarm mode 0 no alarm 1 voltage 2 current 3 power Press F key to select Press V A to confirm and go to the next screen 4th screen RO1 ala...

Page 36: ...met after 15 seconds the alarm will be restored Press F and V A to edit the vaule Press V A to confirm and go to the next screen 7th screen RO2 mode Three modes 0 Latch 1 Momentary 2 Alarm Press F key...

Page 37: ...to select Press V A to confirm and go to the next screen 11th screen RO2 alarm threshold setting The threshold setting range is the same as the measurement range Voltage 0 1200 Current 0 50000 Power...

Page 38: ...cumulated running hours of the meter since being powered up The unit is hour The left figure shows the meter running hour is 1471 32 hours Press V A key to switch to load running hour display screen P...

Page 39: ...rial number display mode It displays the last 8 digits of the meter serial number The left figure shows the meter serial number is DC12012501 Press V A key to return to the metering data mode Figure 3...

Page 40: ...ata format and error check methods are defined in Modbus protocol The half duplex query and respond mode is adopted in Modbus protocol Modbus allows master device PC PLC etc to communicate with slave...

Page 41: ...eck 8 Bits 8 Bits N x 8 Bits 16 Bits Table 4 1 Data Frame Format 2 2 Address Field The address field is at the start of the frame It is composed of 1 byte 8 bits its decimal value range is 0 255 A mas...

Page 42: ...ers to read 2 5 Error Check Field The field allows the error check by master and slave devices Due to electrical noise and other interferences a group of data may be changed while transmitting from on...

Page 43: ...tracted and examined if the LSB equals to 1 the register is exclusive ORed with a preset fixed value if the LSB equals to 0 no action will be taken This process is repeated until eight shifts have bee...

Page 44: ...address and function code query frame must contain the relay register starting address and the number of registers to be read AcuDC 240 relay output address starts from 0000H Relay1 0000H Relay2 0001H...

Page 45: ...and the number of registers to be read AcuDC 240 DI address starts from 0000H DI1 0000H DI2 0001H Table 4 6 depicts of reading DI1 to DI2 status of the slave device with the address of 17 Addr Fun DI...

Page 46: ...voltage AcuDC 240 voltage address is 0200H 0201H Addr Fun Data start reg hi Data start reg lo Data of regs hi Data of regs lo CRC16 hi CRC16 lo 01H 03H 02H 00H 00H 02H C5H B3H Table 4 8 Query frame of...

Page 47: ...to ON data 0000H changes the relay status to OFF The relay will not be influenced by any other data input The following is to query slave device 1 to set relay status as ON Addr Fun Do addr hi Do add...

Page 48: ...H 01H 09H 00H 05H 0AH 00H 01H Value2 hi Value2 lo Value3 hi Value3 lo Value4 hi Value4 lo Value5 hi Value5 lo CRC16 hi CRC16 lo 00H 00H 00H 00H 00H 00H 00H 64H C5H 8AH Table 4 12 Preset multiple regis...

Page 49: ...r Range Data Type Property 0280H 0281H Meter running time 0 999999999 long R 0282H 0283H Load running time 0 999999999 long R Energy The data space below is for energy Function code 03 Read 16 Write A...

Page 50: ...Word R W 0102H Baud Rate 1200 38400 19200 Word R W 0103H Parity Setting 0 Even 1 Odd 2 None 2 3 None 1 3 Word R W 0104H Full Range Current Value 20 50000 A 20 Word R W 0105H Full Range Shunt Value 50...

Page 51: ...y 0 255 s 5 Word R W 0118H 0119H RO1 Alarm Threshold The same as full range value s Float R W 011AH RO2 Mode 0 latch 1 momentary 2 alarm 2 Word R W 011BH RO2 Momentary Time Delay 300 5000ms 1000 Word...

Page 52: ...t R W 0001H DO2 1 ON 0 OFF Bit R W Table 4 18 Relay Status Note 1 Data Type Bit is 1 bit binary Word is 16 bit unsigned integer Integer is 16 bit signed interger Float is 32 bit floating point 2 Read...

Page 53: ...r 2 Input DC Voltage Input Range Direct Input 0 1000V Via Hall Effect Sensor 0 1200V Impedance 2M Load 0 6W Accuracy 0 2 Digital Input Input Type Dry Contact Isolation Voltage 2500 Vac DC Current Inpu...

Page 54: ...0Vac Mechanical Life 5 106 Analog Output Range 4 20mA 0 20mA 0 5V 1 5V Accuracy 0 5 Load Capacity mA type max load resistance 750 V type max load current 20mA Communication Type RS485 Half Duplex Opti...

Page 55: ...1 100 240Vac 50 60Hz 100 300Vdc P2 20 60Vdc Consumption 3W typical Operating Environment Operating Temperature 25 C 70 C Storage Temperature 40 C 85 C Humidity 5 95 non condensing www com information...

Page 56: ...e type Hall Effect Sensor 0 5V 0 4V Communication Current 1000V Full Range Value 1000Vdc 600V Full Range Value 600Vdc 300V Full Range Value 300Vdc 60V Full Range Value 60Vdc 5V Via Hall Effect Sensor...

Page 57: ...requires 0 5 V 2 I O X1 type is configured as 4 20mA by factory default X2 type as 0 5V by factory default If any other type is required please contact us in advance Current Hall Effect Sensor Orderi...

Page 58: ...61 Appendix C Version Information Version Data Description V1 01 20120723 1st version V1 11 20160728 Change wiring diagrams www com information itm com 1 800 561 8187...

Page 59: ...Your Power and Automation Partner www com information itm com 1 800 561 8187...

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