PM864A(With Battery Backup) Program erased during Power Shutdown
PM864A controller running with SB822 external battery backup. During Power shutdown and Power turned on, Program erased in controller and have to download once again.
Battery get replaced and the same issue is repeating during shutdown. Battery Input and Output Voltages are tested and found ok. Cable from Battery to Controller also tested its continuity and tightness and that's also ok. Any suggestion?????
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