GE VersaMax PLC User Manual page 240

240 GFK-1503E
For public disclosure
12.4.7.2 Port Status
The port status consists of a status word and the number of characters in the input buffer
that have not been retrieved by the application (characters which have been received and
are available).
Port status word (see below)
word 1
Characters available in the input buffer
word 2
VersaMax PLC User Manual