CS31 bus module analog values freeze
We are currently commisioning a project with AC500 PM585-ETH CPU. To that CPU we have connected three DC551-CS31, digital input/output (8DI, 16DC 24VDC /0,5A 1-wire) bus modules. To those bus modules we have connected DI524 DI-modules, DO524 DO-moduels and AO523 AO-modules.
The problem is that sometimes the analog output module output current values just freeze. The monitored value reading at automation builder is changing according to the CodeSys PLC program, but the outgoing current and the indicator light at the physical analog module is not. At that time there are no CS-31 bus errors or anything like that. The value at the channel just stays the same until the supply voltage feeding that bus module is restarted.