Hello,

I am also converting a program from S5 to S7 for the first time, and I dont fully understand how JC is working with a FB, because when I declare like that in TiaPortal it tells me that the FB is not defined.

Similarly I get an error with Name: XXX. The code I have in S5 is:

FB 2

Segmento 1 SHIFT DETECTION

Name :LIBRETTO

:A M56.0

:JC FB 20

Name: SHIFT L

:A M100.2

:O M100.3

:A  E 9.2

= M203.0

:BE

Would anyone be so kind to explain to me how to declare JC FB## and Name: xxx in TiaPortal?

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Split from Step 5 Pointer DO.

S5 – JC - this is S5 command for conditional jump to next program block (PB, FC, FB)- if logic before this command is TRUE then you will go to FB20

FB20 is Function Block - this block MUST be in program - because he can have interface.

This block has name and some defined input and output

Your block is without input or output variables, but block must exist

Go to S5 program and open FB20 – and you will find what this block is doing

Automatic code transfer S5 to S7 is not working – you need to be able to read S5 logic and then to make new (similar) in S7 / TIA

David09RS

Hello,

...

Would anyone be so kind to explain to me how to declare JC FB## and Name: xxx in TiaPortal?

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Split from Step 5 Pointer DO.

 Hello David;

JC is a conditional jump in Step 5. as explained by DennsLu  in Step 7 STL you must first satisfy a logical condition (A M0.0, for example) then CALL FB20, DB20 (if that is the name you gabe the function block in Step 7). Note that all S5 FBs need to be translated to a FB with assocated DB in Step 7, some may require only an FC, you will have to decide.

In S5, when openig a block in your program, the Name of the function is attached by S5 in the code. This is nt required in S7 programs, so do not put much energy in that aspect of the conversion.

Hope this helps,

Daniel Chartier