Technical data

Fig. 9.10 takes this difference into account in the explanation of the
individual bits of the status byte:
A further distinction must be made as to the mode (FREE or
CYCLE-SYNCHRONIZED) in which the station list is evaluated, as follows:
➣
FREE:
the station list is updated continuously by the CP.
Bit
01234567
0=no
1=yes
Status byte of the local station:
The complete expected GP is OK
Status byte of the remote station:
Input GP expected from this station
is ok
Station expects input GP from
other stations
Input GP expected from this station
All remote stations are in RUN status
The PLC of the remote station is in RUN status
send/receive delay* in at least
one remote station
send/receive delay* in at least
one GO of the remote station
*With send/receive delay, GOs have changed more often than they could be
sent or received (intermediate values can be lost)
Status byte of the local station:
Status byte of the remote station:
Status byte of the local station:
Status byte of the remote station:
Status byte of the local station:
Status byte of the remote station:
Fig. 9.10: Structure of a Status Byte in the Station List
B8976060/02 Communication with Global I/Os
9 - 21 Volume 1