Technical data

Transmit GP cycle-synchronized
Explanation of Fig. 9.4:
In the cycle-synchronized mode, the consistency of the I/O bytes of a PLC
cycle is guaranteed. The output byte is only transferred to the CP at the
cycle checkpoint (HDB execution) of the PLC. The cycle checkpoint must
be made known to the CP by a handling block.
PLC
program
execution
GPB I/O
area in
CP-DPR
PY7
GPB10
to the BUS
GPB
that transmits
GP
???
100
100
HDB execution
HDB execution
5
HDB execution
0
100
100
100
100
5
5
0
100
tt
5
PLC
cycle
PLC
cycle
Comparison
Comparison
??? undefined status
Fig. 9.4: How the Mode Transmit CYCLE-SYNCHRONIZED Functions
B8976060/02 Communication with Global I/Os
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