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SIMATIC S5 / STEP 5

Converting LIR_from S5 to S7

Thread Starter: ENG. MAZEN Started: 4/7/2012 4:02 PM Replies: 11

4/7/2012, 4:02 PM

ENG. MAZEN

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Dear Sir
i try to convert my plc program from S5 to S7.But i face the problem that my network Have LIR!!!
i try to understand the program but really it is very defecult to converted it. i attached for you the text file have the network and really i appreciate if you help me to change this LIR on the netowork..

Waiting you kindly Reply..
MG

Attachment:

LIR_PROBLEM_TO_KONVERT_S5_S7.pdf (12 Downloads)

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4/7/2012, 4:56 PM

jklm

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Hello,
Please post the code like it was at the origin (before the converter had altered it).
Mention also on what CPU type the program was running in Simatic S5.

Best regards
jklm

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4/7/2012, 5:14 PM

ENG. MAZEN

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I paste the code below......

NAME:   DB-CHNG
DECL:   Q-DB   DKF
DECL:   Z-DB   DKF
DECL:   Q-DW   DKF
DECL:   Z-DW   DKF
DECL:   LAE   DKF
DECL:   ANZW   AW
DECL:   CHNG   ABI

   LW   =Q-DB
   ADD   DH 000EEC00
   LIR   1
   SLD   4
   T   MW 200
   KZW
   SPZ   =M001
   LW   =Q-DW
   LW   =LAE
   +F
   ADD   BF -1
   T   MW 204
   L   MW 200
   ADD   BF -1
   LIR   1
   ADD   BF -6
   >F
   SPB   =M001
   LW   =Z-DB
   ADD   DH 000EEC00
   LIR   1
   SLD   4
   T   MW 202
   KZW
   SPZ   =M002
   LW   =Z-DW
   LW   =LAE
   +F
   ADD   BF -1
   T   MW 206
   L   MW 202
   ADD   BF -1
   LIR   1
   ADD   BF -6
   >F
   SPB   =M002
   L   MW 204
   L   MW 200
   +F
   T   MW 204
   T   MW 210
   L   MW 206
   L   MW 202
   +F
   T   MW 206
   T   MW 212
   LW   =LAE
   T   MW 208
   -F
   T   MW 214
M004:   L   MW 210
   LIR   1
   L   MW 212
   LIR   1
   ><F
   SPB   =M003
   L   MW 210
   ADD   BF -1
   T   MW 210
   L   MW 212
   ADD   BF -1
   T   MW 212
   L   MW 214
   >F
   SPB   =M004
   BEA
M003:   L   MW 204
   L   MW 206
   B   MW 208
   TNW   0
   L   KB 0
   T   =ANZW
   S   =CHNG
   BEA
M001:   LW   =Q-DB
   T   =ANZW
   BEA
M002:   LW   =Z-DB
   T   =ANZW
   BE

and the CPU type is 948

i appreciate you support..

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4/8/2012, 7:05 AM

TIBI68

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ENG. MAZEN wrote:

Hello,

the block looks like a part of a standard package for something together with other blocks. On the first view the block seems to copy data words from one data block into another data block. That can be simply achieved in S7 with the MOVE function. But there is the paramerter CHNG which is set in this block but is not get reset.

Try to find out from which package this block is from. Or maybe somebody knows here. It is possible that you dont need to transfer the block into S7 while there is another package already existing for the S7.

Converting S5 to S7 is not allways transferring block by block into S7. And the converter function may be usefull in converting simple logic operations only. I never used the converter and use the S5 programm just as a reference.

Regards.

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4/8/2012, 11:02 AM

jklm

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Hello,
Like TIB68 already told, the block copies some datawords from one block to another.
Q-DB is the source data block
Z-DB is the destination data block
Q-DW is the start word in the source DB
Z-DW is the start word in the destination DB
LAE is the length (number of words to be transfered)
Before transfering, the block checks if the DBs exists and if number of words can be transfered.
ANZW is a kind of error word where the problematic parameter value is displayed in case of error.
CHNG is a bit is the transfer was successful.

As TIB68 told you, you will not be able to convert this without rewriting the finctionnality in STEP7.
Using the SFC Blockmove with variable ANY pointer is the way to go.
How to proceed with computed ANY pointers is explained in this FAQ:
How do you parameterize blocks, which have "ANY"-type or "Pointer" type parameters
http://support.automation.siemens.com/WW/view/en/20443243

=== Edited by jklm @ 4/9/2012 5:12 PM [GMT ] ===

Best regards
jklm

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4/9/2012, 7:48 AM

BeVee

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ENG. MAZEN wrote:

M004:   L   MW 210
   LIR   1
   L   MW 212
   LIR   1
   ><F
   SPB   =M003
   L   MW 210
   ADD   BF -1
   T   MW 210
   L   MW 212
   ADD   BF -1
   T   MW 212
   L   MW 214
   >F
   SPB   =M004
   BEA
M003:   L   MW 204
   L   MW 206
   B   MW 208
   TNW   0
   L   KB 0
   T   =ANZW
   S   =CHNG
   BEA

Hi ENG. MAZEN,

This block does a 'conditional' block transfer.
If there is a difference between source and destination block, then the source block is copied to the destination block and the CHNG flag is SET. If no change is detected the CHNG flag remains unaltered.
By doing this, it creates an edge when the source block is CHaNGed. I guess this CHNG flag is resetted outside the FB.
But as already stated, S7 offers other options to perform this functionality.

Kind regards,
BV
.

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4/9/2012, 10:13 AM

ENG. MAZEN

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Hi TIBI68

thx for the information but really is not easy to converted one by one sad

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4/9/2012, 10:14 AM

ENG. MAZEN

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Hi BV

Thx for the information and i appreciate if you can convert the network which i add it.

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4/9/2012, 10:21 AM

ENG. MAZEN

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Hi jklm

thx for the information but the example which is in the web address is only for LAR !!!
i appreciate if you can tell me how can i convert the network which i add it..

Regards

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4/9/2012, 3:36 PM

TIBI68

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Hi,

I think that you did not understand me properly. So let me make it more clear for you.

BY 99% YOU DO NOT NEED TO CONVERT THIS BLOCK !

The block is part of a standard package. Only the siemens developers in germany are using this type of code writing.

Is it possible that you can upload us the whole S5 program?

Let me and others confirm with you.

Would be nice if you can give us even some more information about the existing S5 hardware. If you are not sure, just make a picture and upload it as well.

A picture tells more than thousend words. grin

I am looking for some special cards i.e. for communication with other systems.

A "flagship" 948 CPU is not just there without any reason in your project.

Regards.

=== Edited by TIBI68 @ 4/9/2012 3:55 PM [GMT ] ===

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