amit_darwhekar
Member
Hi All,
I have had Power-up fault on three separate processors. All three processors are brand new. They are been used in separate control panels. They have all worked fine for a few days and have shown the Power-up fault out of no where. Two of the processors are 1756-L72 and one is 1756-L61. If I clear the fault and download the program then the processor works fine till I recycle the power. I contacted RA technical support several times and have talked with three different tech support engineers. However none could tell me what causes the processor to go into power-up fault. We replaced the processors and problem seem to go away away for a few days but comes back. I would really appreciate if someone could explain me possible causes of power up fault. I have described the PLC set ups for the above mentioned projects below.
Project A:
Chassis: 1756-A13
Processor: 1756-L61
Digital Input Cards: 4: 1756-IB16D
Digital Output Cards: 3: 1756-OB16D
Analog Input Card: 1: 1756-IF16
Comm. Cards: 1: 1756E-MNET, 1:1756-MCM, 1:1756-EN2T
Power Supply: 1756-PB75
Project B,C
Chassis: 1756-A4
Processor: 1756-L72
1: 1756-RM
1: 1756-CN2R
1: 1756-EN2T
Power Supply: 1756-PB75
I hope I am providing sufficient information here. Please let me know if further clarification is required.
With Regards,
Amit Darwhekar
I have had Power-up fault on three separate processors. All three processors are brand new. They are been used in separate control panels. They have all worked fine for a few days and have shown the Power-up fault out of no where. Two of the processors are 1756-L72 and one is 1756-L61. If I clear the fault and download the program then the processor works fine till I recycle the power. I contacted RA technical support several times and have talked with three different tech support engineers. However none could tell me what causes the processor to go into power-up fault. We replaced the processors and problem seem to go away away for a few days but comes back. I would really appreciate if someone could explain me possible causes of power up fault. I have described the PLC set ups for the above mentioned projects below.
Project A:
Chassis: 1756-A13
Processor: 1756-L61
Digital Input Cards: 4: 1756-IB16D
Digital Output Cards: 3: 1756-OB16D
Analog Input Card: 1: 1756-IF16
Comm. Cards: 1: 1756E-MNET, 1:1756-MCM, 1:1756-EN2T
Power Supply: 1756-PB75
Project B,C
Chassis: 1756-A4
Processor: 1756-L72
1: 1756-RM
1: 1756-CN2R
1: 1756-EN2T
Power Supply: 1756-PB75
I hope I am providing sufficient information here. Please let me know if further clarification is required.
With Regards,
Amit Darwhekar