FB102 could not be downloaded to the CPU315-2Dp

ALU

Hi all,

I have configured system as per attatachment, CP341 talk Modbus protocol, CP340 talk ASCII protocol, if only CP341, system run well. however, when I add CP340, I cannot load FB2 and FB3 (CP340 send, receive FB) to CPU. Pls noted that when I try only CP340 the system also run well.

Anyone who help me to confirm that can I use CP340 (ASCII protocol)together with CP341 (Modbus Slave) as attatachment???

Many thanks!!!

This very urgent...hic

Attachment:HW.JPG (6 Downloads)

fritz

Hello ALU

you didn't list the part number of your 315, but my guess is that it is a pretty OLD CPU.

If that's the case than the reason that FB 2 & 3 won't work is because they use SFB 52 & 53 inside which don't exist in older S7 CPU's.

Siemens has - for that reason - "old" FB102& 103 available in the CP PtP library (which use SFC 58 & 59), give these a try and let us knowif it solved the problem.

I hope this helps