Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 317

• (4) PV start 2 (Start point searching: PVSTART = 2)
The process variable and the PV start search start step (PVSTARTNO) are used to search a match point within the range
specified by the PV start search end step (PVENDNO), and the control will start with the step number or time.
When no match point is found, the closest point (maximum point or minimum point) is used.
If multiple maximum points or minimum points are found, the point that comes last is used.
When a match point is the end point of the last step, the control will be immediately completed and the setting value before the
mode switching to the AUT mode will be held.
Ex.
When a match point was found within the search range
Setting value (SV)
PV input value
SV0
T1_ T2_
Search start step
Ex.
When no match point was found within the search range
Setting value (SV)
When PV input value
is larger
SV0
When PV input value
is smaller
T1_ T2_
Starts from the closest point to the PV value.
T3_ T4_ T5_
Search range
Search end step
Starts from the closest point
to the PV value.
Minimum point
(at rear)
T3_ T4_ T5_ T6_
Search range
Time (T_)
Maximum point
(at rear)
Time (T_)
T7_ T8_
10 LOOP CONTROL OPERATION
10.25 Multi-Point Program Setter (M+P_PGS2_)
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