Panasonic S-Link FP2 Manual page 51

FP2 S−LINK Unit
Example:
Note
After confirmation has been made, always set the RUN/CHK.
selector switch back to the "RUN" position. The display reverts to
the normal "
5.4 S−LINK I/O Device Address Recognition
Number of connected units is
displayed in a blinking display.
" display.
Operation
5 − 11