Oookaay...
So I'm looking for a little more brain trust on this project. I took the uploaded PLC5 program and converted it to an L35E, added the SLC/PLC5 mapping. I downloaded to a borrowed L35E with no I/O attached, and connected to the old PC with a null modem serial cable. Rebooted the PC, and it seemed to connect to the PLC. I changed a value of the product count on the PLC, and the change showed up on the PC. Works, right?
I'm now in the middle of installation of the new system. I moved down to an L32E, as the program was fairly small, and added some local I/O, a PF525 and six 1747-AENTR for existing SLC based remote I/O. Turned on the system, and the PLC won't communicate with the PLC. When the PC boots, it does an autoconfigure to find the PLC. When it's not connected, or has a bad cable, it can't find anything. When I use a null modem cable, it finds the PLC, but won't initiate communications.
I've checked and double-checked the settings, and I can't find anything different or incorrect between the serial settings on the PLC5, L35E and L32E programs. Is there some kind of difference between the L32E and the L35E other than memory size?
The PC is running MS-DOS and Wintelligent Linx (not sure of version). There's an error message that flashes on the screen briefly before the HMI program loads, but it disappears to quickly to read. Tomorrow I'm going to video record the boot screen to try to capture that. I was able to exit into DOS, but my skills there are... lacking. One of the times I exited, I got an message followed by a config screen that seemed to indicate that Wintelligent Linx was set up for DH+. However, the PC is connected using a serial cable to Ch0 of the PLC.
Here's a dropbox link to the three PLC programs, pics of the two screen shots, and a pic of the PLC5. Anybody have any ideas?
https://www.dropbox.com/sh/cgc1yze6hcegz0s/AACHAOhQwSk6d27TvkE3IBeRa?dl=0