ABB REC650 Technical Manual page 264

Section 10
Control
EXE_CL
OPENPOS
CLOSEPOS
tStartMove timer
tIntermediate timer
IEC05000097 V1 EN
Figure 125: The timers tStartMove and tIntermediate
258
The above blocking outputs are stored in a non-volatile memory.
Substitution
The substitution part in SXSWI is used for manual set of the position for the switch.
The typical use of substitution is that an operator enters a manual value because the
real process value is erroneous of some reason. SXSWI will then use the manually
entered value instead of the value for positions determined by the process.
It is always possible to make a substitution, independently of the
position indication and the status information of the I/O board. When
substitution is enabled, the position values are blocked for updating .
The substituted values are stored in a non-volatile memory.
Time diagrams
There are two timers for supervising of the execute phase, tStartMove and
tIntermediate. tStartMove supervises that the primary device starts moving after the
execute output pulse is sent. tIntermediate defines the maximum allowed time for
intermediate position. Figure
Close pulse duration
t1
tStartMove
The timers tOpenPulse and tClosePulse are the length of the execute output pulses to
be sent to the primary equipment. Note that the output pulses for open and close
command can have different pulse lengths. The pulses can also be set to be adaptive
with the configuration parameter AdaptivePulse. Figure
the execute output pulse. The AdaptivePulse parameter will have affect on both
execute output pulses.
125 explains these two timers during the execute phase.
t2
tIntermediate
en05000097.vsd
1MRK 511 287-UEN A
AdaptivePulse = TRUE
if t1 > tStartMove then
"switch-not-start-moving"
attribute in 'cause' is set
if t2 > tIntermediate then
"persisting-intermediate-state"
attribute in 'cause' is set
126 shows the principle of
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