Hi everyone,
We recently changed our memory board for a rebuild one and have the following problem now:
We can send programs from a PC to the machine without problem but we cannot send anything from the machine to the PC. We have tried with both ports (M5 and M74) and have the following results:
M5: No transmission machine-PC whatsoever. The machine can receive OK with the PC set to "No Flowcontrol" (So the XOn/XOff are not working).
M74: We have transmission machine-PC but its all junk and not ASCII. The XOn/XOff work fine as we can even use the drip feed from the PC to the machine without any problems.
We have tried all baud rates and even baud rate mismatches but have no success. We have tried 1 and 2 stop bits. We have tried configuring the ports as "RS232" and as "New interface" as well as the ISO/ASCII parameter and the result is always the same PC-machine works machine-PC gives out junk (and nothing at all in port M5).
We have done trials with short cables directly to the ports and have no difference. We have used several computers with no success. We even checked the signal on en O-scope. M74 has a good signal level M5 has nothing.
Are we missing something (a parameter perhaps)?? Is it possible that one side of the RS232 is damaged and the other one OK?
Thanks for your help.
Michael