J
Hi There,
We have 4 Siemens S5 PLCs and 10 S7 PLCs on a single PROFIBUS. We are experiencing major instability with communication between the S5s and the S7s. All the S7s seem to communicate without a problem, but the S5s lose connection to the S7s randomly. We installed repeaters on the bus, with no success. We changed all the settings there are available that might have an effect on the comms but cannot resolve the problem. (even running at the lowest baud rate possible). Once the S5 looses its comms all the S7s has to be disconnected from the bus, the S5s started up seperately and the one by one the S7 reconnected to the bus. Otherwise the S5s drop the comms....
Is this a known problem between these systems, or are we overlooking something?
Thanks for the help!
regards
johan de Waal
We have 4 Siemens S5 PLCs and 10 S7 PLCs on a single PROFIBUS. We are experiencing major instability with communication between the S5s and the S7s. All the S7s seem to communicate without a problem, but the S5s lose connection to the S7s randomly. We installed repeaters on the bus, with no success. We changed all the settings there are available that might have an effect on the comms but cannot resolve the problem. (even running at the lowest baud rate possible). Once the S5 looses its comms all the S7s has to be disconnected from the bus, the S5s started up seperately and the one by one the S7 reconnected to the bus. Otherwise the S5s drop the comms....
Is this a known problem between these systems, or are we overlooking something?
Thanks for the help!
regards
johan de Waal