Facing the following problem with a SLC-5/04 set-up:
The main source is taken from a UPS power supply!
What happens is that for an unexplainable reason the power supply to the CPU is lost (24Vdc) when measuring the voltage on the SLC power supply, removing the power card and the CPU brings back the 24Vdc! however the program is lost and needs to be uploaded again and again!
Any logical explanation of what might go on?
Thanks
The main source is taken from a UPS power supply!
What happens is that for an unexplainable reason the power supply to the CPU is lost (24Vdc) when measuring the voltage on the SLC power supply, removing the power card and the CPU brings back the 24Vdc! however the program is lost and needs to be uploaded again and again!
Any logical explanation of what might go on?
Thanks