YOKOGAWA UP35A, User Manual

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9-12
IM 05P02D41-01EN
9.3.3 Time-prioritized PV start (STC=TIME)
Description
With Time-prioritized PV starts, operation start is triggered by segment time, which sets
the time from the PV at program start to the target setpoint (TSP) of segment 1.
CAUTION
Time-prioritized PV start (STC=TIME) cannot be selected when the segment setting
method (SEG.T) is Segment ramp-rate (TM.RT.)
The segment-1 ramps are determined by the segment time (TIME.)
The program pattern will start at PV.
Ramp rate = (Target setpoint (TSP) - PV) / Segment-1 time
The start point of control program pattern will be a point a - e.
TSP
SSP
a
b
c
d
e
Segment 1 Segment 2 Segment 3
Program pattern
Program operation start (PRG)
Time
Setpoint
PV at start Operation-starting point
a a
b b
c c
d d
e e
Setting Details
Parameter
symbol
Name
Display
level
Setting range Menu symbol
SSP
Starting target
setpoint
EASY
0.0 to 100.0% of PV input range
(EU)
(Setting range: P.RL to P.RH)
PROG
STC Start code EASY
SSP: Program operation begins
with the starting target setpoint.
RAMP: Ramp-prioritized PV start
TIME: Time-prioritized PV start
LSP: Local-mode start
9.3 Setting the Program Starting Conditions (STC)