LED Instruction 1516Pro Cpu

I am using a 1516Pro CPU and I would like to get the status of the 24v led from the processor.

I have found some general information on the usage of the LED instruction but I have not found anything specific enough to point to this LED.

First I need to find the hardware identifier for the processor. When looking at the system constants created with the processor there are about 15 to choose from. I think I have found one called "Local-common" that might be it but not sure.

I then need to find the LED number that points to the 24v LED. I keep getting a return value 9 so I think I'm picking the wrong number

What documentation can I reference to find these answers

Hello 

Perhaps the attached file would help you.

Hello,

In addition you can use the example in the following link to invoke PLC  Status 

https://support.industry.siemens.com/cs/us/en/view/109481628