Hello Ron,
I am working with that program with slight change but I am facing a problem with reception of data. The data is coming continuously from the COM port of the embedded PC in ASCII format as I can see it connecting my laptop through HyperTerminal. But when I connect the communication cable to PLC from embedded PC, I am getting ASCII string in PLC memory ST19:0 but not regularly. Most of the times it work fine but I don't receive any data string in PLC memory ST19:0 few times even embedded PC is sending data continously. The only link between the PC and PLC is communication cable.
All connections in the cable are ok as per your previous mail and we receive data also most of the times but few time it doesn't appear. The only change I made in the program you sent is instead of using ABL instruction on the first rung I used ACB instruction because the string is not having any end of line character. Although I am enclosing my program for your kind perusal. I could not find the problem of working this program intermittently. It would be very helpful if you could put some light.
I am working with that program with slight change but I am facing a problem with reception of data. The data is coming continuously from the COM port of the embedded PC in ASCII format as I can see it connecting my laptop through HyperTerminal. But when I connect the communication cable to PLC from embedded PC, I am getting ASCII string in PLC memory ST19:0 but not regularly. Most of the times it work fine but I don't receive any data string in PLC memory ST19:0 few times even embedded PC is sending data continously. The only link between the PC and PLC is communication cable.
All connections in the cable are ok as per your previous mail and we receive data also most of the times but few time it doesn't appear. The only change I made in the program you sent is instead of using ABL instruction on the first rung I used ACB instruction because the string is not having any end of line character. Although I am enclosing my program for your kind perusal. I could not find the problem of working this program intermittently. It would be very helpful if you could put some light.