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Chapter 5. FUNCTIONS
5-9
A
C
A'
B
SP pattern
Start point
Current
PV value
Start point
Start point
(1)
(1)'
(1)"
■ PV start
If PV start is set in the program setup, PV is started by
regular RUN operation.
The first point where PV matches the SP in the program
pattern (including bias for both PV and SP) is searched
for, and operation is started from that point.
However, note that if a matching point is not found, op-
eration is started from the beginning of segment 1.
When PV has started, event operating points and the time
of time events are automatically corrected. If the PV start
function is selected by setup data C 5 2 to C 5 4 settings
relating to external switch input, PV start can be executed
without setting PV start in the program setup.
PV start is valid for segments in the currently selected
program, and invalid for the segment at the pattern link
destination.
■ Cycle
The cycle function is for repeating operation from the No.1
segment of the program pattern to the final set segment
for a preset number of cycles. The number of cycles can
be set up to 9999.
When a number of cycles “n” is set, the operation count
becomes “n+1”.
When executing cycle operation, operation at the end point
of the final segment is not carried out, and operation is
restarted with the settings of events 1 to 3 and time events
1 to 5 cleared. At this time, PV is not started and opera-
tion starts from the No.1 segment even if PV start is set.
If the SPs at the pattern start and end points do not match,
the SP changes in a stepped manner during cycle opera-
tion.
SP
Cycle 1
Time
(1)
(2)
(3)
(4)
(5)
(6)
PV start points
(1) PV starts at point A where the PV value first
crosses the SP pattern.
(1)' PV starts at point B where the PV value first
crosses the SP pattern.
(1)'' Point C of segment 1 is the PV start point
since there is no point where the PV value
crosses the SP value.