s800 and DP820
Older S800 with DP820 and several AI, AO, DI and DO810s. The DP820 failed and after replacement it doesn't read the pulse input (~60000). Watching device status shows no data. I can force a value which then displays on the HMI (PP245).
Is there a configuration or commissioning step I missed? I compare the variables with a working unit and see no differences.
Usually there are no need to do anything if the running program is the same and you only replaced the moduke.
- What is the status of LED's on the module, when it is installed?
- Did you closed promptly the mechanical lock on the TU - it provides the power supply to the module?
- Did you check if the power supply to the module is correct - L+ and 24VDC?