Siemens S7-414 Run Indicator

What bits can I use to accurately
display when a S7-414 PLC is in
run mode?

Any bit!

If the PLC doesn't RUN, you can't use any bit.

I know that. However in Allen-Bradley
SLC 500's there are several processor status bits you can use. This way when someone is looking at the code it will be
more upfront and professional instead
of using any bit.