We’ve recently experienced several comm failures between the UNIC and the PLC in relatively short period of time. We’ve not determined a cause for the failures. Secondly, when the comm failures occur we have to cycle the UNIC to reset the system. However after cycling the UNIC, all the screens with Auto/Manual functions indicate that everything is in Auto and OK go. However, they aren’t in Auto. We have to go through every screen with Auto/Manual functions and cycle each point to manual and back to automatic. We learned this just by watching the Wartsila controls guy. Has anyone else experienced this and what have you done to correct it.
We have had some communications failures between the UNIC and the PLC that have been found to be in the Siemens network switches and once on the UNIC LDU ethernet port itself. Josh from Wartsila found the network switch issue with the Siemens diagnostic software for the switches and we changed ethernet ports on the LDU as part of suggested troubleshooting on the other.
We continue to experience failures of various types; fail to start, start but won’t sync to the grid, etc.. No alarms that indicates that there is a communication issue, just various failures that don’t seem to make any sense. Each time a reboot of the UNIC cures the issue. Richard you mentioned issues with the network switches, and that Josh had Siemens diagnostic software that resolved the issues. Can you elaborate on the Siemens diagnostic software? What changes were made to the switches, or was the switch replaced? Should all of the Wartsila controls guys have access to this diagnostic software? I have a Wartsila controls guy onsite today, and I would like to address this issue while he is here.