Good evening,

I would ask for clarification on MB_CLIENT function (Tia Portal V12). 

The situation is the following:

With an S7-CPU1212C (IP address 10.76.1.100) I need to read 10 INPUT COIL MODBUS (12258-122562) of a device with Device Id = 1 and reached through a MODBUS / TCP converter with IP: 10.76.1.101 (I already verified that these records exist, they are achievable and are non zero). 
Not wanting to add additional communication modules, it seemed appropriate to use the MB_CLIENT function set in the mode that you can see in the screenshot attached.

Please find attached screen shot

However, when I start communication (M4.0 = 1%), despite the STATUS is 16 # 0000 (thus no error) in the DB DATI_RCV.DATI (which is an array of 10 integers) do not find any value. 

If someone in the Forum, had some suggestions to offer me, I would be very grateful.

Greetings 

Sorry wrong attachment...

pleas find attached file

Dear All Expert,

Anyone please tell me how to change the value of MB_UNIT_ID into MB_CLIENT (instance DB) of MB_CLIENT instruction in s71200 PLC as a Client.

My Third party device RTU Slave id: 1 and in myblock MB_UNIT_ID showing 00FF.

I think i am not getting any data from the third party device due to this.

I want to change MB_UNIT_ID value 00FF to 1.

Its very urgent....

Please suggest me.

Closed cause question posted twice.

The second thread with the subject MB_CLIENT Inst in S71200 PLC AS MODBUS CLIENT is published within the conference Communication / Networks.

Best regards
Min_Moderator