YOKOGAWA UP750, User Manual

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<Toc> <3. Programming>
IM 05E01B02-41E
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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.
Segment 1 Segment 2
Program
setpoint
Time
Setpoint
Segment time
Final target setpoint
Starting target setpoint
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 Controller Behavior
a Begins to run from point a according to the time setting defined for segment 1.
b Begins to run from point b according to the time setting defined for segment 1.
c Begins to run from point c according to the time setting defined for segment 1.
d Begins to run from point d according to the time setting defined for segment 1.
e Begins to run from point e according to the time setting defined for segment 1.
Segment
1
Segment
2
Segment
3
Segment
4
Segment
5
Program
setpoint
Final target setpoint
e
d
b
a
Time
Setpoint
c
Start of
program operation
<Controller Settings>
Set the STC (Start Code) program parameter to “2”.
1st Edition : May 31,2000-00