Dear All,
I would like to connect a Touch panel via a Radio modem to the PLC for Remote montoring. Its a 2 wire RS 485 connections on both devices. But i found that in touch panel Data A is (-) and Data B is (+). But in other device (ie) PLC, Data A is (+) and Data B is (-). If i connect through the cable it works fine but if i connect through Radio modem it does not work. i tried reversing the polority but no response. So please advise. Waiting for your reply.
With regards.
Libbysen
I would like to connect a Touch panel via a Radio modem to the PLC for Remote montoring. Its a 2 wire RS 485 connections on both devices. But i found that in touch panel Data A is (-) and Data B is (+). But in other device (ie) PLC, Data A is (+) and Data B is (-). If i connect through the cable it works fine but if i connect through Radio modem it does not work. i tried reversing the polority but no response. So please advise. Waiting for your reply.
With regards.
Libbysen