Hello,
I have one M91-2-UA2 PLC programmed for one analog input and one analog output.
My analog input settings is between MI0 - MI20 and my analog output settings is above MI20.
I downloaded my program in the PLC and check it on line by changing the values of my MI's and everything was working fine.
I switched OFF my power supply because i wanted to give 24v DC to output terminals to measure the analog output and then I switch it ON,
when I get on line I realized that the values above MI15 was not be saved and all of them was 0 (MI0 - MI15 was ok).
I saved new values on MI15 to MI100 and switched OFF and then ON my power supply, the problem is the same , zero values from MI15 and above.
I test my PLC like that for 3 times. I updated my PLC version to 3.90 biould 03 and the probem is still there.I mesaure the battery and the voltage is 3.06 V DC.
Do you know anything about my problem ?
Any ideas or sugestions are welcome.
Thank you in advance.
Best reqards
Stavros