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AND Weighing Indicator AD-4401, Инструкция по эксплуатации

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7-9 AUTOMATIC FREE FALL COMPENSATION 

Automatic free fall compensation is the capability to reduce a loading error in batch weighing.    The following two kinds 
can be selected depending on the functioning of the automatic free fall compensation (SQF-03). 

  1)   Automatically setting the “moving average of the last four actual free falls” as the free fall for the next    weighing. 
  2)  Automatically adjusting free fall setting, applying fuzzy logic.   

 
This section describes item 1;    item 2 is described in 7-10.   
 
The hopper scale has a certain increase in the weight value until batch finish since the dribble gate is closed.    This 
increase is called a free fall.    To perform weighing with little error, the free fall setting for the setpoint must be equal to an 
actual free fall.   
As a remedy, there is an option to automatically update the “moving average of the last four actual free falls” as the next 
free fall setting.    The loading error and actual free fall are expressed by the following formulas.   
Error = Batch Finish net - final   
Actual free fall = Batch Finish net - *Dribble flow cut net   
* Final - Free fall 
When the loading error exceeds the automatic free fall effective width (SQF-04), automatic free fall compensation is not 
performed, taking it as an error. 
Since customer programmed control mode judges the Batch Finish timing externally, a calculation is made assuming that 
weighing is completed when an automatic free fall command is input to the Control I/O.   
Automatic free fall compensation is designed to reduce the weighing error in batch weighing.    Therefore, Check 
Weighing does not have this capability. 

Setting 

SQF- Name 

Default 

Parameter Description 

0 

No Automatic Free Fall Compensation 

1 

Moving average of last four actual Free Falls 

03 

Automatic Free 
Fall 
Compensation 

0 

2 

Fuzzy Automatic Free Fall Compensation 

04 

Automatic Free 
Fall Effective 
Width 

0 

0 

to 

9999999 

If a loading weight is within the final +/- automatic 
Free Fall effective width, Automatic Free Fall 
Compensation is on. 

 

7-10 FUZZY AUTOMATIC FREE FALL COMPENSATION 

Automatic free fall compensation mentioned above is very effective when the actual free fall does not change.   
However, it is very difficult for conventional automatic free fall compensation to eliminate the   
following actual free fall fluctuation factors. 

 

• Changes of specific gravity or viscosity of the weighed substance   

 

• Inconstant flow rate due to a change of water pressure, and so on 

 

• Bad flow due to adherence of the weighed substance to the surface of the hopper 

 

• Clumps in the weighed substance 

Fluctuation factors mentioned above affect the actual free fall, but their relations are fuzzy. 
The AD-4401 takes in their effects as the data    1 through 3 and reflects the fuzzy data in calculation of the free fall, 
applying fuzzy logic theory. 
 

 

1) Flow rate and its change           

 

• The actual free fall increases as the flow rate becomes greater.         

 

• Reliability of the actual free fall becomes higher as a flow is stabilized.   

 

2) Lapse of time     

 

• The newest weighing result is least affected by a secular change. 

 

3) Reliability of the loading result         

 

• Higher reliability is given to the actual free fall where distribution of the loading result is more focused.   

 

 

Note : Precautions for using Fuzzy Automatic Free Fall Compensation

 

 

• Fuzzy automatic free fall compensation is not made on the first loading after free fall setting for a setpoint. 

 

• Take 3 seconds or more to carry out the dribble flow in order to calculate an internal flow rate. 

 

• The free fall value always changes because it is calculated per sampling. 

Содержание Weighing Indicator AD-4401

Страница 1: ...AD 4401 WEIGHING INDICATOR 1386 2A IE...

Страница 2: ...duced transmitted transcribed or translated into any language in any form by any means without the written permission of A D Company Ltd The contents of this manual and the specifications of the instr...

Страница 3: ...HAPTER 4 OPERATION 13 4 1 OPERATION MODE 13 4 2 CONFIRMATION OF OPERATIONS 14 4 3 SETTING A SETPOINT 15 CHAPTER 5 CALIBRATION 18 5 1 GENERAL DESCRIPTION 18 5 2 ACTUAL LOAD CALIBRATION CAL SET 19 5 3 C...

Страница 4: ...EE FALL COMPENSATION 52 CHAPTER 8 INTERFACE 53 8 1 CONTROL I O 53 8 2 SETPOINT 56 8 3 STANDARD SERIAL OUTPUT SER OUT 57 CHAPTER 9 OPTIONS 60 9 1 OP 01 PARALLEL BCD OUTPUT 60 9 2 OP 03 RS 422 485 INTER...

Страница 5: ...librating with an actual load in case of trouble Flexible Digital Filter allows installation in unstable environments Excellent vibration canceling performance Widely covers from high speed hopper sca...

Страница 6: ...highest digit in case of negative polarity Units g kg t international version kg lb USA version Subdisplay section Tare final and accumulated weight values are selectable by the function Also availab...

Страница 7: ...ely Digital filter function Integrating capability Two digital filters connected in series Cutoff frequency range 0 7 to 11 Hz Integrating capability Integrates the net weight automatically or manuall...

Страница 8: ...e center of the zero point center zero MD Illuminated when the weight value is unstable The motion condition can be changed using a calibration related function GROSS Illuminated when the displayed we...

Страница 9: ...nated when the net weight is more than the final weight minus preliminary Built in automatic program mode Illuminated during medium flow OP PLM Blinks while setting the optional preliminary Normal bat...

Страница 10: ...the comparison result output Lo Lo is turned on Lo Blinks while setting the Lo limit Illuminated when the comparison result output Lo is turned on Go Blinks while setting a reference value Illuminated...

Страница 11: ...eared GROSS NET The key used to switch the weight display from gross weight to net weight and vice versa While inputting a number pressing this key will increase the number of the blinking digit by on...

Страница 12: ...utput for the standard serial interface current loop d One of the following options can be attached OP 01 BCD output OP 03 RS 422 485 input output OP 04 RS 232C input output e Connects to the power so...

Страница 13: ...re grounding with other electric devices that create electrical noise 3 The power source should be either 100 to 120 VAC 10 15 specification or 200 to 240 VAC 10 15 specification with a frequency of 5...

Страница 14: ...no stray material is left in the case screws spacer etc before closing the case 3 3 LOAD CELL For a load cell cable the use of a 6 wire shielded cable is recommended in order to reduce weighing error...

Страница 15: ...modes in compliance with its operating conditions Use the keys to change the mode You can change the mode in the full line arrow direction The broken line arrow direction indicates only an automatic...

Страница 16: ...played The right most digit starts blinking Step 3 To select the desired operation use the or key Press the key CAL Fnc is displayed Step 4 Press the ENTER key The indicator enters the calibration rel...

Страница 17: ...isplayed After calibration is finished be sure to attach the CAL key cover 4 3 SETTING A SETPOINT The setpoint refers to a weight setting such as a target weight or final weight required for a weighin...

Страница 18: ...1 To return to the normal mode press the ESC key SETTING WITH A 5 DIGIT THUMBWHEEL SWITCH SPF 01 1 In the normal mode the 5 digit thumbwheel switch is read as the final value in real time Using this...

Страница 19: ...gits Over Limit 2 digits Under Limit 2 digits For the key switches Option Prelim Zero Band Loss in weight Customer Programmed Control Mode CALF 14 2 Loss in weight built in Automatic Program Mode CALF...

Страница 20: ...data directly related to weighing as well as basic constants for the weighing instrument such as minimum graduation weighing capacity and so on Digital span The zero point and span are set by enterin...

Страница 21: ...o weight placed on the system press the ENTER key after the motion detect mark is turned off The Subdisplay section displays for about 2 seconds When C ErrXX is displayed there is an error taking plac...

Страница 22: ...e function for the setting of the unit Step 5 Select the function number you want to set using the and keys The display section displays a set value for the selected function In this example select CA...

Страница 23: ...alue beyond this limit is an overflow and not displayed 05 Zero Range 2 0 to 30 A range of accepting zero from the ZERO key or Control I O Represented in terms of percent with respect to the weighing...

Страница 24: ...accepted even if the gross weight is negative Not available on the USA version 0 1 Does not output when the weight value is overflowing or unstable 0 12 Standard Serial Output Output When Weight Valu...

Страница 25: ...ght against Span Input Voltage 16000 0 to 800000 decimal point ignored When Digital Calibration calibration not using weights is performed CALF 15 and CALF 16 also have to be done This setting will be...

Страница 26: ...he calibration weight is more than the weighing capacity CErr 5 The calibration weight is less than the minimum graduation Calibrate with the proper calibration weights CErr 6 Sensitivity of the load...

Страница 27: ...select Basic Capabilities Related The main display section displays the function number and the cursor appears in the lowest digit The Subdisplay section displays a set value for the function Group N...

Страница 28: ...function by the F key is not available if there is any set to HOLD in the Control I O see6 3 3 Batch Start 4 Emergency stop 5 Clear to zero 6 Clear tare 7 Clear accumulation 02 Capabilities of F Key...

Страница 29: ...l output signal Two of them are connected in series as shown below Low frequency components which cannot be covered only by setting of the digital filters can be dealt with by equivalently lowering th...

Страница 30: ...fective in Built In Automatic Program mode 04 Automatic free fall effective width 0 0 to 99999999 Automatic free fall compensation is made if a loaded weight is within the final automatic free fall ef...

Страница 31: ...atch monitoring timer 0 0 to 255 In step of 1 second Non 0 Set time 16 Supplementary flow open timer 0 10 0 01 to 2 55 In step of 0 01 second 17 Supplementary flow close timer 0 1 Only effective in Bu...

Страница 32: ...ut Terminal B3 OUTF 04 Capability of Output Terminal B4 OUTF 05 Capability of Output Terminal B5 OUTF 06 Capability of Output Terminal B6 OUTF 07 Capability of Output Terminal B7 OUTF 08 Capability of...

Страница 33: ...ht 2 Gross 3 Net 4 Tare 5 Gross Net Tare A D standard format 6 Accumulated weight 7 Accumulated counts 01 Output Data 1 8 Accumulated weight Accumulated counts Accumulation data format 1 Stream mode 2...

Страница 34: ...tart signal from an external unit and when the specified weight is obtained a gate is closed and a loading result is judged The AD 4401 can also deal with a discharging sequence Weighing Mode CALF 14...

Страница 35: ...al its output is turned on and closes gate G3 Now one weighing cycle is completed and the AD 4401 display shows the final value indicating that hopper 2 has been loaded with that weight Use the overli...

Страница 36: ...he display reaches final output is turned on and closes gate G3 Now one weighing cycle has completed and the display on the AD 4401 shows the final value indicating that receiving bin has been loaded...

Страница 37: ...the weight has stabilized after the judgment wait timer completes the set time If automatic free fall compensation is being used its calculation will be made The Batch Finish output signal is turned o...

Страница 38: ...ish output signal is turned off The judgment result output signal overlimit or underlimit is turned off Now the weighing sequence has cycled and restarts from Step 2 at this time Note In the case of b...

Страница 39: ...s free fall setting The dribble flow output is turned off The judgment wait timer starts The Batch monitoring timer is reset 7 When the weight has stabilized after the judgment wait timer completes th...

Страница 40: ...se wait timer starts The discharging time monitor timer is reset 15 When the discharging valve close wait timer completes the set time the discharging output signal is turned off 16 When the Batch Sta...

Страница 41: ...the set time If automatic free fall compensation is being used its calculation will be made The Batch Finish output signal is turned on If there is an excess or shortage the judgment result output sig...

Страница 42: ...40...

Страница 43: ...is input When loading has taken more than the specified time an alarm signal is output as follows With the Batch monitoring timer set the maximum expected loading time If loading exceeds this time ea...

Страница 44: ...et connect the thumbwheel switch to the SET POINT connector as show in the figure below SETPOINT CONNECTOR WIRING Pin Pin A1 1 B1 Prelim 100 A2 2 B2 Prelim 101 A3 4 B3 Prelim 102 A4 8 B4 Prelim 103 A5...

Страница 45: ...limit Net Target Weight Lo limit Lo Net Target Weight Lo limit Lo Lo Net Lo Lo limit When an output condition is established a relevant output terminal is turned on power continuity with output COM A...

Страница 46: ...ow SETPOINT CONNECTOR WIRING Pin Pin A1 1 B1 Hi Limit 103 A2 2 B2 Hi Limit 104 A3 4 B3 Lo Limit 100 A4 8 B4 Lo Limit 101 A5 Target weight 100 B5 Lo Limit 102 A6 Target weight 101 B6 Lo Limit 103 A7 Ta...

Страница 47: ...t Weight Lo Limit Lo Target Weight Lo Lo Limit Net Target Weight Lo Limit Lo Lo Net Lo Lo Limit When an output condition is established a relevant output terminal is turned on power continuity with ou...

Страница 48: ...o Limit 101 A5 Target weight 100 B5 Lo Limit 102 A6 Target weight 101 B6 Lo Limit 103 A7 Target weight 102 B7 Lo Limit 104 A8 Target weight 103 B8 A9 Target weight 104 B9 A10 Hi Limit 100 B10 A11 Hi L...

Страница 49: ...o Limit Lo Net Lo Limit Lo Lo Net Lo Lo Limit When an output condition is established a relevant output terminal is turned on power continuity with output COM An output terminal number can be selected...

Страница 50: ...1 B1 Hi Limit 103 A2 2 B2 Hi Limit 104 A3 4 B3 Lo Limit 100 A4 8 B4 Lo Limit 101 A5 B5 Lo Limit 102 A6 B6 Lo Limit 103 A7 B7 Lo Limit 104 A8 B8 A9 B9 A10 Hi Limit 100 B10 A11 Hi Limit 101 B11 Used int...

Страница 51: ...Limit Lo Lo Limit Net Lo Lo Limit Lo Lo Net Lo Lo Limit When an output condition is established a relevant output terminal is turned on power continuity with output COM An output terminal number can...

Страница 52: ...00 B5 Lo Lo Limit 100 A6 Hi Hi Limit 101 B6 Lo Lo Limit 101 A7 Hi Hi Limit 102 B7 Lo Lo Limit 102 A8 Hi Hi Limit 103 B8 Lo Lo Limit 103 A9 Hi Limit 100 B9 A10 Hi Limit 101 B10 A11 Hi Limit 102 B11 Use...

Страница 53: ...on weight is selected with the general function Selection of Setpoint Weight SQF 01 It is meaningless to use the internal count unless the minimum graduation is 2 or more 7 7 AUTO PRINT Auto print is...

Страница 54: ...ee Fall Compensation 1 Moving average of last four actual Free Falls 03 Automatic Free Fall Compensation 0 2 Fuzzy Automatic Free Fall Compensation 04 Automatic Free Fall Effective Width 0 0 to 999999...

Страница 55: ...eighing sequence error A5 Discharge start Starts the discharging sequence Input A6 Key enable While this input is ON the keys disabled by the general function FNC 01 are enabled A7 Input COM Input COM...

Страница 56: ...mal batching Loss in weighing in the Customer programmed control mode 8 Digital switch read disable Level While this input is turned on reading of the digital switch stops 9 Clear tare Edge Clears the...

Страница 57: ...g on the weighing mode CALF 14 See CHAPTER 7 WEIGHING SEQUENCE 9 Motion detection Turned on when the weight value is stabilized 10 Online Turned on in case of the normal mode 11 Weighing sequence runn...

Страница 58: ...set to 10 or more the value of the thumbwheel switch is input and multiplied by 10 CONNECTOR FOR SETPOINT NOT INCLUDED WITH THE ACCESSORIES Parts Name Q ty A D s parts Number Description Connector 1...

Страница 59: ...JA TCP0576 TCP0576 Hoshi Electric Setting SIF Name Default Parameter Description 1 Displayed weight 2 Gross 3 Net 4 Tare 5 Gross Net Tare A D standard format 6 Accumulated weight 7 Accumulated counts...

Страница 60: ...Load GS 47 53 GroSs NT 4E 54 NeT Header 2 TR 54 52 TaRe Separator 2C 0 to 9 30 to 39 2B 2D SP space 20 Data ASCII code 2E SP SP 20 20 No unit SP g 20 67 g kg 6B 67 kg SP t 20 74 t Unit lb 6C 62 lb Exa...

Страница 61: ...SP SP CR LF SP value Stream The data is transmitted in synchronization with the update of the display When the display rewrite exceeds the baud rate data transmission is suspended until the next displ...

Страница 62: ...UT Setting of the BCD output is done with the general functions BCDF 01 through BCDF 05 Setting BCDF Name Default Parameter Description 1 Displayed weight 2 Gross 3 Net 01 Output data 1 4 Tare 1 Strea...

Страница 63: ...ta become 1 Hold input is fixed at negative logic All outputs including strobe are held when HOLD input is turned on Pin Pin A1 1 x 100 B1 2 x 100 A2 4 x 100 B2 8 x 100 A3 1 x 101 B3 2 x 101 A4 4 x 10...

Страница 64: ...to the OP 04 RS 232C Signal System Conforms to the EIA RS 422 or RS 485 Data bits 7 bits 8 bits Parity bits 1 bit Even or Odd None Stop bits 1 bit 2 bits Baud rate 600 1200 2400 4800 9600 19200 bps Co...

Страница 65: ...PLE Note The polarity of signal A and B vary from computers Not necessary to ground the SG terminal for the computer without a signal ground terminal Wait 8 ms or more before selecting a unit by SDA a...

Страница 66: ...for AD 4401 2 70 LINE INPUT 1 A2 Data receive from AD 4401 2 80 PRINT A2 Displaying the data from AD 4401 2 90 CLOSE 100 END 9 3 OP 04 RS 232C INPUT OUTPUTS OP 04 provides external inputs outputs to b...

Страница 67: ...6 Comparison data Net Output per sampling Set to 9600 bps or less at the time of output per sampling 1 600 bps 2 1200 bps 3 2400 bps 4 4800 bps 5 9600 bps 03 Baud rate 5 6 19200 bps 0 None 1 Odd 04 P...

Страница 68: ...of 100 times second in synchronization with sampling TRANSMISSION FORMAT There are three kinds of transmission format A D standard format Accumulation data format and Output per Sampling format Output...

Страница 69: ...ase of overflow Output per Sampling Format Example Setpoint data Weight data Hexadecimal 6 digits Terminator Gross Net 3 0 0 0 2 7 1 0 CR LF Overflow 0 0 7 F F F F F CR LF Weight data 7FFFFF Overflow...

Страница 70: ...hing loading result B RT Request Total Reads the accumulated weight and times B DT Delete Total Clears the accumulated value A MG Make Gross Displays the gross A MN Make Net Displays the net A MZ Make...

Страница 71: ...out the weighing sequence status The response data is sent in the Output per Sampling Format The weight output value is the net RF Request Final Reads out the weighing Batching result Outputs net wei...

Страница 72: ...de SPF 01 to 2 Setting SPF Name Default Parameter Description 0 Thumbwheel switch Unrequired mode 1 5 digit mode 01 Setpoint value read mode 0 2 16 digit mode GENERAL SPECIFICATION General Specificati...

Страница 73: ...ou can select the required unit If the CONT terminal of the unit 2 is shorted in the figure below the data set for 2 will be input When this is done if the other units are shorted simultaneously the d...

Страница 74: ...ut When using a relay pay attention to the minimum applicable load The following figure shows the connections used when using a PLC to set the final free fall and preliminary through the BCD input Set...

Страница 75: ...of decimal point is set in CALF 02 Interface Specification Current output 4 to 20 mA Applicable load resistance 0 to 520 Resolution Approximately 1 3000 Non linearity 0 1 F S or less Zero point 0 02...

Страница 76: ...ease both keys Note When entering the function mode is not wanted press the ESC key The indicator will return to the normal mode Step 2 With the ZERO key pressed and held press the ENTER key The indic...

Страница 77: ...yed The current value can be changed with the or key A load cell signal value being input is displayed in the unit of mV V When this value is within a range of 0 to 2 mV V with no load it is likely th...

Страница 78: ...SC key to exit GENERAL FUNCTION INITIALIZATION MODE Step 1 Turn off the power With the SETPOINT key pressed and held turn on the power All display digits are illuminated and then init ra is displayed...

Страница 79: ...lay content 0 None 1 discharging 05 status display Capability 0 2 Zero tracking Discharging is exclusively intended for normal batching built in automatic program mode Series connection of two digital...

Страница 80: ...he final automatic free fall effective width Only effective in Batch weighing mode 05 Unstable Dribble Flow Timer 3 0 0 0 to 25 5 In step of 0 1 second If Flow time is shorter than the setting the pre...

Страница 81: ...of 0 01 second 17 Supplementary Flow close timer 0 1 Only effective in Built In Automatic Program mode 18 Discharging start wait timer 0 0 19 Discharging valve close wait timer 0 1 0 0 to 25 5 In step...

Страница 82: ...ommand for manual print User s settings CONTROL I O OUTPUT FUNCTIONS OUTF 01 Capability of Output Terminal B1 OUTF 02 Capability of Output Terminal B2 OUTF 03 Capability of Output Terminal B3 OUTF 04...

Страница 83: ...Accumulation data format 1 Stream mode 2 Auto Print mode 02 Data transmitting mode 1 3 Manual Print mode 1 600 bps 03 Baud rate 2 2 2400 bps OP 01 BCD PARALLEL OUTPUT FUNCTIONS Setting BCDF Name User...

Страница 84: ...None 1 Odd 04 Parity 2 2 Even 7 7 bits 05 Character bit length 7 8 8 bits 1 1 bit 06 Stop bit length 1 2 2 bit 1 CR 07 Terminator 2 2 CR LF 1 RS 422 08 RS 422 RS 485 switching 1 2 RS 485 This setting...

Страница 85: ...brated point 2 06 Zero Tracking Time 0 0 0 0 to 5 0 Zero tracking is performed in combination with CALF 07 Zero Tracking Width It is not performed when set to 0 0 Its unit is seconds 07 Zero Tracking...

Страница 86: ...lt in automatic program mode Batch Weighing For the hopper scale use 5 Check weighing 1 6 Check weighing 2 7 Check weighing 3 14 Weighing Mode 3 8 Check weighing 4 Check Wei ghing For the platform sca...

Страница 87: ...85 APPENDIX DIMENSIONS AD 4401 OP 05...

Страница 88: ...86...

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