bfoss
Member
We have a MicroLogix 1100 with Firmware 8.0 that fails to recognize the EEPROM. An error of failure to store to EEPROM 0x4 is displayed when trying to store the program to the memory module. We have gone through steps to power off/on the processor, reseat the memory module and power off/on, tried a second memory module that was working on another MicroLogix 1100 at a second site with same failed results on this processor, verified the original memory moduled worked on the second site's MicroLogix 1100, tried a second MicroLogix 1100 with firmware 9.0 with two different EEPROMs at this problem site. It seams the only item which is the same under these conditions is the PLC program, unless two different MicroLogix 1100s with different firmware (the second being new out of the box for test) both are faulty. Any suggestions on what could cause this?