Technical data

Relationship between the HDB RECEIVE 211 call and the DP polling
list cycle
The data information received during the processing of the DP polling list is
only transferred to the input area of the CP at the end of the polling cycle.
DP polling list processing
PLC program processing
CPU
CP 5430 TF/CP 5431 FMS
L2 bus
Call HDB RECEIVE 211
(with data information "A")
Received
data information "B"
DP polling list cycle n+1
Call HDB RECEIVE 211
(with data information "A")
Call HDB RECEIVE 211
(with data information "A")
Call HDB RECEIVE 211
(with data information "B")
Received
data information "A"
Received
data information "C"
DP polling list cycle n
DP polling list cycle n+2
Fig. 11.10 Relationship Between HDB RECEIVE 211 Call and DP Polling List Cycle
Distributed I/Os (DP) B89060/02
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