Posted 6 May 2018 Hi, Anyone knows how to retain PLC program for CQM1 PLC model in the EEPROM? Everytime I power off the PLC, when power on the PLC Program lost and the PLC status is in ERROR(No END Instruction error). Already tried downloading with AR1400 turn on from the CX Programmer software but still no luck. Hope someone out there guide me step by step. I'm new to CX Programmer. Thanks lot! marky Share this post Link to post Share on other sites