defcon.klaxon
Lifetime Supporting Member
OP
Here's an update for anyone interested:
Co-worker went down last Friday and replaced master PLC (CPU 316) with replacement. Local slaves were then able to communicate via PROFIBUS, though remote PLC is still down. This would point to the physical PROFIBUS connection between master PLC and remote slave since he connected to the remote slave locally with the PC Adapter.
We are going to be heading back this Wednesday to try to get the local slaves and PC/PG operational; even if the pump station has to be run manually, if we can get the filters up and running that would at least allow the municipality to draw water from the lake and not rely on their wells.
Latest roadblock is trying to get the existing HMI (Wonderware) to properly communicate with master PLC; it seems like we're reading in data (turbidity from local slaves seems to come up just fine) but when a switch in the HMI is changed and we watch the PLC logic, it doesn't seem to register the change. This is all second-hand from my co-worker as I wasn't there on Friday. If there is anything I should keep in my back pocket when trying to set up the PC/PG interface with the 316, I'm all ears; this connection is through a CP5611 card. What's odd is that when we got there, the connection through the CP5611 was in the MPI port of the CPU (left side connection) but the COMMS Preference window shows the settings as CP5611, PROFIBUS...wouldn't it need to be MPI to connect there? A bit odd, though we're told the HMI screen was operational before the system took a dump so that's just one more mystery.
Fixing this system is like pulling teeth, especially since neither of us have any Siemens experience! We're making small advances in progress though, and that's largely due to your help here so thanks a bunch!
Co-worker went down last Friday and replaced master PLC (CPU 316) with replacement. Local slaves were then able to communicate via PROFIBUS, though remote PLC is still down. This would point to the physical PROFIBUS connection between master PLC and remote slave since he connected to the remote slave locally with the PC Adapter.
We are going to be heading back this Wednesday to try to get the local slaves and PC/PG operational; even if the pump station has to be run manually, if we can get the filters up and running that would at least allow the municipality to draw water from the lake and not rely on their wells.
Latest roadblock is trying to get the existing HMI (Wonderware) to properly communicate with master PLC; it seems like we're reading in data (turbidity from local slaves seems to come up just fine) but when a switch in the HMI is changed and we watch the PLC logic, it doesn't seem to register the change. This is all second-hand from my co-worker as I wasn't there on Friday. If there is anything I should keep in my back pocket when trying to set up the PC/PG interface with the 316, I'm all ears; this connection is through a CP5611 card. What's odd is that when we got there, the connection through the CP5611 was in the MPI port of the CPU (left side connection) but the COMMS Preference window shows the settings as CP5611, PROFIBUS...wouldn't it need to be MPI to connect there? A bit odd, though we're told the HMI screen was operational before the system took a dump so that's just one more mystery.
Fixing this system is like pulling teeth, especially since neither of us have any Siemens experience! We're making small advances in progress though, and that's largely due to your help here so thanks a bunch!