Hi everyone!

I have trouble with data exchange between 2 PLC S7-1200 using DPRD_DAT, DPWR_DAT and need your help.

If i use directly address, it's working but when i use DPRD_DAT and DPWR_DAT, it not wok.

Can i use DPRD_DAT to read lower 64byte data consistent?

Thank you very much!

this is my project : 

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ChristophD

Hello,

which error you get with the Blocks?

I have never used the Blocks for Datatransfer between PLC, only to communicate with DP-Slave or IO-Device.

On DPRD_DAT in PLC_1 you use LADDR 16#10F, which adress should this be ?
Regards

Christoph

 ret_value : 8093;

CM1242-5 has harware id: 271 (16#10F)

I changed address at Record : P#M20.0 byte 6 , it still has value 8093, hixhix

So i can not use block in this case?

Thank you so much.

By the way, can you tell me which type i can choose at the process image (as the picture) when i use profibus.