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<Toc>
<3. Programming>
3-26
■ Controller Behavior at the Start of Program Operation
You can determine how the controller should behave at the start of program operation.
1. Letting the controller run from a starting target setpoint
A starting target setpoint refers to a setpoint from which program operation begins. The
controller operates in such a manner that the setpoint changes to the final target setpoint
over the segment time set for segment 1, irrespective of what the PV value is.
Setpoint
Segment 1
Segment 2
Final target setpoint
Starting target setpoint
Program
setpoint
Time
Segment time
Start of program operation
<Controller Settings>
Set the STC (Start Code) program parameter to “0”.
2. Letting the controller start from the current setpoint and run according to
time settings defined for segment 1
This method is not available if the SEG.T (Segment Setting Method) parameter is set to
“ramp setting.”
Starting Point of Operation
a
b
c
d
e
Setpoint
a
Controller Behavior
Begins to run from point a according to the time setting defined for segment 1.
Begins to run from point b according to the time setting defined for segment 1.
Begins to run from point c according to the time setting defined for segment 1.
Begins to run from point d according to the time setting defined for segment 1.
Begins to run from point e according to the time setting defined for segment 1.
Final target setpoint
b
Program
setpoint
c
d
e
Segment
Start of 1
program operation
Segment Segment Segment
2
3
4
Segment
5
Time
<Controller Settings>
Set the STC (Start Code) program parameter to “2”.
IM 05E01B02-46E
1st Edition : May 31,2000-00