select
tSelect
timer
execute command
t1
t1>tSelect, then long-
operation-time in 'cause'
is set
en05000092.vsd
IEC05000092 V1 EN
Figure 175: tSelect
The timer tExecutionFB supervises the time between the execute command and the
command termination, see figure 176.
execute command
position L1
t1>tExecutionFB, then
long-operation-time in
'cause' is set
open
close
close
openposition L3
close
openposition L2
t1
tExecutionFB
timer
cmd termination L1
cmd termination L2
cmd termination L3
cmd termination
position
open
close
* The cmd termination will be delayed one execution sample.
*
en05000094.vsd
IEC05000094 V1 EN
Figure 176: tExecutionFB
The parameter tSynchrocheck is used to define the maximum allowed time between
the execute command and the input SYNC_OK to become true. If SYNC_OK=true at
the time the execute command signal is received, the timer "tSynchrocheck" will not
start. The start signal for the synchronizing is obtained if the synchrocheck conditions
are not fulfilled.
1MRK 502 048-UEN A Section 12
Control
351
Technical manual
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