PM861 redundant controller is not executing logic after every 2/3 hrs
Problem of Controller is not excuting the logic as the DO's are getting off and there was an error of Communication lost on the PLC HMI.but its not working as I taken some trial,those are mentioned.
1.Ethernet network has been removed, and only the Channel 1 of the primary controller is connected to the computer.
2. In the program of CPU hardware config in CCB5.0.1, when we go to Controllers tab --> RCS_Port --> Hardware AC 800M --> PM861/TP830 --> CF reader --> Ethernet, both Ethernet 1 and 2 the latching error is coming which is getting cleared but the PM861/TP830 tab when double clicked the latching error message shown "No time sync" is not getting cleared. The images of the above error are attached for your reference.
3.We have one redundant controller unit of PM861and one Spare Controller PM861 in stock, but this problem is occurring in the all the three Controllers whichever is connected.
4.We made restore factory setting with the all three Controller but then also problem is occurring.
5.We have taken out the CPU from network and checked the CPU individually by configuring with the communication PLC CI853. No logic is made and loaded the Config. file to the CPU, but still the error occurs.
6.ETH latched error is cleared but CPU error is not clearing anyway.
7. Logic Back up, System log file and Error occurrence time Screen Shot are attached for your ready reference.
8.When the problem occurs, the CPU is inaccessible at all, only pinging is going on, no I/O scanning, no logic execution, no download available.
9.The controller has to power cycle, or cold restart to make it available for download and after some times the frequency of resetting the CPU is increasing.
10.the system load and cyclic load and it was observed that the total system load was 71% and the cyclic load was 25%. Again this was reduced to 56% and 15% respectively by changing the scan time from 95ms to 90ms. 12.There is no error in the CPU hardware and the green "R" light is glowing also.but logic is not running.
Please suggest what need to be done now,
please see the logic backup(compact Control builder 5.0.1) & error log and some screen short for Ref.
Previously same problem was occured with other person in diffrent site,but I'ts not much helpful.