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Siwarex U question once again..

Created by: panthripu at: 10/30/2011 12:17 PM (5 Replies)

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10/30/2011 12:17 PM	Rate (0)
panthripu Posts: 32 Rating: (0)	Hi everyone I have already posted related questiong before also but am still help less. Our system consists of siwarex U weighing module comunicating to S7 PLC.For visualistion we use WinCC.The original program in our PLC allows us to tare/zero the weighing scale from HMI only , however I wish tomake SPAN calibration also from the HMI. Communication between Siwarex and PLC is throught SFC 58/59. SFC59 is reading the the RECNUM :B#16#20 (DS32 (Values Ch. 2) and RECORD:P#DB802.DBX0.0 BYTE 10. About Zeroing ....SFC58...when zeroing command is pressd from HMI DB80.DBX18.0,It triggers the RECNUM:B#16#C (i bellieve command for zero) and write the content of P#DB80.DBX10.0 to Adjust digit 0. Am i correct ? Now if i want SPAN from HMI , Should I call SFC 58 again ? If yes what should be RECNUM :?... andWhich memory location is to be used to tranfer adjustment digit 1 value? Should i write it to P#DB80.DBX11.0 SFC 58 is being used to write. The present logic is Call SFC 58 REQ:=DB80.DBX18.0 (set zero) IOID:=B#16#54 LADDR:=DB80.DBW16 (address) RECNUM:=B#16#C (commands) RECORD:=P#DB80.DBX10.0 RET_VAL:=DB80.DBW12 BUSY:=DB80.DBX18.6
panthripu Posts: 32 Rating: (0)
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10/30/2011 6:54 PM	Rate (0)
Zenta Silver Member Joined: 10/12/2006 Last visit: 11/27/2024 Posts: 206 Rating: (25)	Hi panthripu, maybe this link help you... Siwarex U example Regards Zenta

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11/2/2011 1:34 PM	Rate (0)
Siwarexi Gold Expert Joined: 1/4/2007 Last visit: 12/5/2024 Posts: 1153 Rating: (175)	Hello panthripu, RECNUM:B#16#C means only: Write DR12 (DR12: Commands for Ch2) to the Siwarex U. Into the parameter “RECORD” of the SFC58 you have to write the command code, e.g. “3” for zeroing. If you want to do a calibration for the Ch2 follow the steps below please: 1. Read the DR4 from the Siwarex U module to the PLC: Call SFC 59 … RECNUM:=B#16#4 //Read DR4 … RECORD:=P#DB80.DBX0.0 BYTE 10 //DR4 has a length of 10 Byte (DB80.DBX0.0: only as an example, you need 10 Byte for the DR4.) 2. Change the calibration weight at the address DB80.DBW8. The address is DB80.DBW8 if the parameter “RECORD” was “P#DB80.DBX0.0 BYTE 10”. (See the step above.) Please see also the chapter 9.3.5 and 9.3.6 into the attached file. 3. Write the changed DR4 from the PLC to the Siwarex U module: Call SFC 58 … RECNUM:=B#16#4 //Write DR4 RECORD:=P#DB80.DBX0.0 BYTE 10 //DR4 has a length of 10 Byte … 4. Execute the command “1” (Set as zero) for the Ch2 if the scale is empty: L 1 //1 = Set as zero T DBxx.DBWyy Call SFC 58 … RECNUM:=B#16#C //Execute a command for Ch2 RECORD:=P#DBxx.DBXyy.0 BYTE 2 //command code … (“DBxx.DBWyy” AND “DBxx.DBXyy.0” are only placeholders) 5. Load the scale with the defined calibration weight. 6. Execute the command “2” (Adjust) for the Ch2: L 2 //2 = Adjust T DBxx.DBWyy Call SFC 58 … RECNUM:=B#16#C //Execute a command for Ch2 RECORD:=P#DBxx.DBXyy.0 BYTE 2 //command code … (“DBxx.DBWyy” AND “DBxx.DBXyy.0” are only placeholders) 7. The calibration is finished. Congratulation! Best regards Siwarexi Attachment Manual_U_062005_en.pdf (328 Downloads)

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11/3/2011 7:23 AM	Rate (0)
panthripu Posts: 32 Rating: (0)	Thanks Siwarexi Still i would request you help in clarifying following.. 1) to access the individual DR, I need to call SFC58 or SFC59 seperately.? Am i right? 2)If my known weight is fixed...i.e. i am using a standard weight for span calibration everytime, Is it not enough to to access DR12 and i write code 2(Adjust) to RECORD . Is it not enough ? And as i told i already have program for zeroing/taring.
panthripu Posts: 32 Rating: (0)
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11/3/2011 11:07 AM	Rate (0)
Siwarexi Gold Expert Joined: 1/4/2007 Last visit: 12/5/2024 Posts: 1153 Rating: (175)	Hello panthripu, To your questions: 1) to access the individual DR, I need to call SFC58 or SFC59 seperately.? Am i right? My answer: Yes, SFC58 and SFC59 work independently. 2) If my known weight is fixed...i.e. i am using a standard weight for span calibration everytime, Is it not enough to to access DR12 and i write code 2(Adjust) to RECORD . Is it not enough ? My answer: If you use a standard weight which you don’t change it is not necessary the execute the steps 1. to 3. from my last reply. You can start with step 4.: At first you have to execute the command “1” (Set as zero) when the scale is empty. Afterwars you have to execute the command “2” (Adjust) when the adjustment weight is on the scale. It is not enoughto execute onlythe command "2" because you have also to define the adjustment zero point of the scale. This happens with the command "1". Command "1" (Set as zero) is NOT! the same as the zeroing command "3". The procedure to execute the commands “1” and “2” is equal to the zeroing command "3". Best regards Siwarexi

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1/16/2017 1:29 PM	Rate (0)
Min_Moderator Platinum Member Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4766 Rating: (122)	New question published by alanisgp is split to a separate thread with the subject Siwarex U module, faceplate freezes. Best regards Min_Moderator

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