Dear Expert 

I Using 400h modbus tcp/ip 

Actually Communication Is Okay (From Cp to Dcs) But I Disconnected cable and Connect 

Then Communication was not possible 

Remedy is only cpu warm restart (stop -> run)

I don't want to warm restart

How to retrigger communication if this situation

PLZ HELP  

Thanks

Hello AutoGen_165478,

is the S7 Client or Server of communication? Are you using Modbus/TCP CP Redundant (2XV9450-1MB00) or Modbus/TCP CP Red V2 (2XV9450-1MB11) software version.

Did you get any Status on STATUS Outputs on Modbus block?

Greez Bachgeist

Bachgeist

Hello AutoGen_165478,

is the S7 Client or Server of communication? Are you using Modbus/TCP CP Redundant (2XV9450-1MB00) or Modbus/TCP CP Red V2 (2XV9450-1MB11) software version.

Did you get any Status on STATUS Outputs on Modbus block?

Greez Bachgeist

 Hello Bachgeist

 I am using Server and Modbus/TCP CP Redundant (2XV9450-1MB00)

Actually I never saw Status

Hello,

the 2XV9450-1MB00 is NOT the Redundant Version! Please check it.

To initialize the Modbus communication, you can use the internal INIT Bit, but therefor the Init-Parameters has to be also connected in OB1 or your cycling OB where the Modbus block is called.

If you open the Instance-DB from Modbus block you will find same Parameters like "Init-Start", "Init-Error" and "Init-Status". With this you can trigger a manual initialization.

But also you have to check the Status output of Modbus block. Without any detailed error indication, we are not able to give prober help.

Regards Bachgeist

Hello,

 How many connections you made in Netpro ? 

Is it single sided or double sided redundant ?

New question published by RenatoAlex is split to a separate thread with the subject Problem with Modbus Server CP S7 400.

Best regards
Min_Moderator