Parrey

Sorry i have been away and have just got home. I was able to pull the program off using rs232. I have a look into the program and in6 was a power failure relay which was checking for 24v. I added a 24v input to it and the errors went away and i was able to use the unit fully. Thank you all for your help

I am new to this, just got given a m91-2-ra22 unit and been asked to get the program from the plc. I have 24v power supply connected to the top input and it power and i can communicate with it over rs232. The unit is showing system fault. Power in failure. Is there a way to fix this? Ive never used these units before. Thank you