Hi,

I am new at STEP7 programming (but not at Mobus)

reading the forum, I understand the needs of using MB_CLIENT / TSEND_C

wich of them shall I use to establish Modbus TCP connection between the S7-1500 and the Wireless WHART gateway ?

Thanks in advance

Gilles

hi,

for Modbus TCP you need the ModbusClient or the ModbusServer blocks.

TSEND_C is a block to establish a TCP-connection and send data over it.

regards,

Hi and thanks for your quick reply !

then, I wonder where I can configure the modbus connection to use the X2 P1 LAN interface which is connected to the secondary interface of my gateway

cheers

Ok, fine I guess I found the answer in the default tag table where profinet interface IDs are defined

Hi thanks,

Now I manage to write MB_CLIENT configured with X2 P1, is there a simple way to debug the status of the modbus TCP connection on 502 port ? (I have a port mirroring on the X2 P1 with wirrshark and I don't see any TCP SYN outgoing connection request)