S7300 CPU312 Rack power issue

[Arizona]

Dear all,

My CPU312 is in RUN state, RUN and DC5V LED's are green. Still there is no input or output. CP341 (RS422/485) is also installed in a rack with other I/O modules. I figured out that there is a power failure in all cards except main CPU because all the indicating lights are off only CPU is energized.

Any suggestion please??

 

[mk42]

Dear all,

My CPU312 is in RUN state, RUN and DC5V LED's are green. Still there is no input or output. CP341 (RS422/485) is also installed in a rack with other I/O modules. I figured out that there is a power failure in all cards except main CPU because all the indicating lights are off only CPU is energized.

Any suggestion please??

S7-300 cards often have separate power from the main CPU. Power must usually be wired to each card.

 

[Arizona]

I'll confirm it once I'll be on site. If they have separate power then will go for the troubleshooting of power supply.