Sorry to be a little slow getting back to this topic. I'm building a controller for a powder coating oven. It's an in-house project, but gets put on the back burner when the customers need something.
Anyway, this has been a comedy of errors on my part...telling the MT8050iE to talk to the Nano-10 thru COM3 on the PLC (when there is NO COM3 on the PLC), Building the RS-485 cable to use COM3 on the HMI, when apparently it prefers to use COM1 (I still haven't figured out how to tell the HMI to use COM3, since there's no way to change the HMI Interface in EB Pro) and lastly, throw in a few used NANO-10 purchased off eBay with unknown history. Whenever I did get the PLC to talk the HMI it was only for a few seconds.
Fast forward to yesterday and I broke out a brand new, in-the-box NANO-10. I also downloaded the HMI and PLC demo software that is in the file MT8050iE_Demo_and_Guides.zip available at
https://triplc.com/mt8050ie.htm . Fixed my RS-485 cable to be on COM1 of the HMI, installed the demo software in the HMI and PLC. Viola, it worked! PLC and HMI are talking. So, then I got brave because I wanted to see indicators change on the HMI. I added 2 lines of code, INPUT_3-------OUTPUT_3 and INPUT_4-------OUTPUT_4. Already had switches on INPUTS 3 and 4. Download the modified program to the PLC. Boom, they stopped talking again. I give up!
So, I took your advice...HMI and PLC are talking over Ethernet. Temperature controller is talking to PLC over RS-485. Everything seems to work.
Two questions though.
When I'm done programming, can I remove the switch from the equation and just have the NANO-10 connected directly to the MT8050iE thru a straight (or cross-over) Ethernet cable?I occasionally get the "PLC no connection" message popping up. Only pops up for a second and only when I'm doing something on the HMI that changes a variable in the PLC.
Is this normal? I never saw that with the FMD88-10 and MT8050iE combination.
Thanks,
Neal