ReconnectWait Status After Downloading New PLC Project

I'm having an issue reconnecting to the PLC from Ignition. I was testing a PLC project that didn't include Ignition and downloaded the project to the controller. When I reverted back to my original PLC project, I'm stuck with the status "ReconnectWait" for driver com.inductiveautomation.MitsubishiTcpDeviceType under device connections. Absolutely nothing has changed as far as any configuration other than downloading a different PLC program to the controller. Prior to the plc download, it connected and was reading/writing tag data with no issues.

I'm using an IQ-R series plc on ignition 8.1.36. I'm able to ping the controller from the Gateway just fine with no issues (Gateway is Raspberry pi on Raspbian OS). I'm using a simple 5-port unmanaged switch to interface between PLC and raspberry pi, so shouldn't be any kind of port or firewall blocking on that end.

Database and OPC connections are all fine and running. I've attempted to delete the PLC connection and recreate it. I've stopped, disabled, and restarted the gateway via systemctl commands, and rebooted the gateway multiple times. I just am not able to get the Gateway to reconnect to the controller, and not sure what else to try. Is there an issue where Ignition doesn't like to see a project change in the controller? I can't figure out how or why a plc program change caused this issue as I would have expected everything to be back to normal once the original program was restored in the controller.

Any insight or advice would be greatly appreciated.

Maybe downloading a PLC program reset the required configuration in the PLC to allow connections?

Read/follow through this: Mitsubishi TCP Driver | Ignition User Manual

1 Like

That was it! The SLMP port number changed between the two downloads blocking the connection. Thank you!