172-65710M-04 (SC-F71 Parameters/Functions) 23 Dec 2021
317
When a Measured value (PV) is between the determination points on the + (plus)
and - (minus) sides, always started from Hot start 1 when recovered.
When a Measured value (PV) is out of the determination points or the Start
determination point is set at “0”, operation starts from any start state selected by
Hot/Cold start.
The start determination point is set to “0” when shipped, therefore the procedure
below is not performed, and operation is started in the start condition selected in
“Hot/cold start”.
During Cascade control: Determined for Master side (Input 1) only.
In the case of Master single control and Slave single control, according to the
setting of each input.
Action upon power failure for 2-loop control is as follows:
Hot start 1, Hot start 2, Cold start and Action to follow when power is restored
Control is started in a mode according to the start determination point.
STOP start
Starts in Hot start 1 when Input 1 or Input 2 stays within the start
determination point. Starts in STOP start when both of Input 1 and Input 2 are
outside the start determination point.
Parameter setting
Hot/Cold start [Engineering Mode: Function block No. 50 (
Fn50
)]
Parameter symbol
Data range
Factory set value
PD
0: Hot start 1
1: Hot start 2
2: Cold start
3: STOP start
4: Action to follow when power is restored
1)
0
1)
Adheres to the setting for RUN/STOP selection when power is restored, MAN/AUTO selection when power is restored and when
switching to RUN, LOC/REM selection when power is restored and when switching to RUN, LOC/EXT selection when power is restored
and when switching to RUN, Output value selection when power is restored.
Input 1_Start determination point [Engineering Mode: Function block No. 51
(
Fn51
)]
Parameter symbol
Data range
Factory set value
1. PDA
0 to Input 1_Input span
(When Control with PV select: 0 to PV select input span)
0: Operation starts from any start state selected by Hot/Cold
start
[Varies with the setting of the Decimal point position.]
0
Hot start 1
Set value (SV)
Start determination point setting
Low
High
Start determination point
(plus side)
Start determination point
(minus side)
Hot start 1, Hot start 2,
Cold start, or Reset start
Hot start 1, Hot start 2,
Cold start, or Reset start
Содержание SC-F71
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