watch dog timer in S7 300(step7)

hello all
in my SCADA i wanted to provide PLC healthy/Fail signal.
but im unable to get the address of this signal.
can any body help me do i need to call some SFC/ OBs to get one signal

for exapmle :
earlier i was looking for the time values like where plc is storing the time (HH:MM:SS) so i found that there are bit in OB1 for this purpose.


im looking for some help like where i can found that bit.


regards

What do you want to do exactly? May you explain it in more detail?

Check out the "Area Pointer" Tab under each connection. You can use the coordination flag to achieve what I "think" your looking for.

Nick

You might also what to check this FAQ out.

http://support.automation.siemens.com/WW/view/en/22407622

Nick