Nathan1978
Member
Hi everyone. I am an absolute novice when it comes to PLC's and am in need of some expert advice and i'm not sure where to start asking questions so i thought here might be the best place to start so i'll try to give the best description of symptoms.
I recently powered up a stone masonry machine that runs a Siemens Simatic S5 115U CPU 941. The machine hasn't had power in about 3 years.
Upon power up the stone masonry machine would not respond to any of the commands through the operating console. An electrician has confirmed the PLC is in "STOP" mode and upon investigation we have discovered the Backup battery is dead (removed, tested and reinstalled) while the machine was powered and the low battery light is indicating on the PLC. I purchased the machine as is and have no back up of the program on the PLC. The machine to the best of my knowledge (while similar units were constructed) was one of a kind. I also noted lights were signalling on the input side of the PLC in response to operating console functions- i'm assuming it was reading my input commands, though while in STOP mode would not execute them.
I am very apprehensive about playing with any components (like the PLC) that could render my machine useless.
I have since learned the machine has an "EPROM". Does this mean my program is still there and i simply need to replace the battery prior to powering up the machine again? Can anyone suggest how i can get my stone masonry machine running again? Any advice would be very much appreciated. Attached is a photo of the PLC while powered if that helps. Thankyou again.
I recently powered up a stone masonry machine that runs a Siemens Simatic S5 115U CPU 941. The machine hasn't had power in about 3 years.
Upon power up the stone masonry machine would not respond to any of the commands through the operating console. An electrician has confirmed the PLC is in "STOP" mode and upon investigation we have discovered the Backup battery is dead (removed, tested and reinstalled) while the machine was powered and the low battery light is indicating on the PLC. I purchased the machine as is and have no back up of the program on the PLC. The machine to the best of my knowledge (while similar units were constructed) was one of a kind. I also noted lights were signalling on the input side of the PLC in response to operating console functions- i'm assuming it was reading my input commands, though while in STOP mode would not execute them.
I am very apprehensive about playing with any components (like the PLC) that could render my machine useless.
I have since learned the machine has an "EPROM". Does this mean my program is still there and i simply need to replace the battery prior to powering up the machine again? Can anyone suggest how i can get my stone masonry machine running again? Any advice would be very much appreciated. Attached is a photo of the PLC while powered if that helps. Thankyou again.