Posted 20 Oct 2017 We just tried powering up a PLC5/80E that has sat unpowered for who knows how long. The processor battery light and PROC light are on solid. Does anyone know any tricks for getting this processor running again? fyi, its not for production. We are doing some migrations and wanted to use this to test some DH+ communications. thanks in advance, Joe Malter Grantek Share this post Link to post Share on other sites
Posted 20 Oct 2017 Sounds like it just dropped the program due to the backup battery being dead. You can try dumping a program to it. The fault light should go away once it has a program. If you want to keep the program during power down then you will need to get a new battery. Not really necessary for testing purposes. 1 person likes this Share this post Link to post Share on other sites
Posted 20 Oct 2017 Russell, Thanks for the quick reply. You gave us new hope and it worked. The challenge was getting a serial connection to the processor. Our USB to serial (and throw in through a VM for complexity) failed to connect. We were able to get RSLinx to connect once we switched to a docking station with a hard serial port. All good. thanks, Joe 1 person likes this Share this post Link to post Share on other sites
Posted 21 Oct 2017 Glad it worked! Serial ports in the days of no more serial ports can be fun. Share this post Link to post Share on other sites