DLMUK
Member
Hi,
I am trying to connect an S7-1200 using a CM1241 module to a Red Lion PAXP configured as MODBUS.
So far I have...
DB9 on connector going onto CM1241. Pin 8 as A. Pin 3 as B.
PAXP meter with PAXCDC40 configured with terminal 12 as B and terminal 13 as A.
Both set as 9600/8/N/1. I'm trying to access holding register 40001.
I cannot get a response from the PAXP device. The screenshot of TIA can be found here
https://www.dropbox.com/s/o2gk4vb44db7od4/485.jpg?dl=0
The error coming up on MB_MASTER is 8180 which the manual shows as "Invalid Port ID Value or error with MB_COMM_LOAD instruction."
My LOAD block doesn't present an error but i'm not sure what the PORT_ID value is.
Can anyone help?
thanks,
I am trying to connect an S7-1200 using a CM1241 module to a Red Lion PAXP configured as MODBUS.
So far I have...
DB9 on connector going onto CM1241. Pin 8 as A. Pin 3 as B.
PAXP meter with PAXCDC40 configured with terminal 12 as B and terminal 13 as A.
Both set as 9600/8/N/1. I'm trying to access holding register 40001.
I cannot get a response from the PAXP device. The screenshot of TIA can be found here
https://www.dropbox.com/s/o2gk4vb44db7od4/485.jpg?dl=0
The error coming up on MB_MASTER is 8180 which the manual shows as "Invalid Port ID Value or error with MB_COMM_LOAD instruction."
My LOAD block doesn't present an error but i'm not sure what the PORT_ID value is.
Can anyone help?
thanks,