YOKOGAWA UP35A, User Manual

Page: 161 / 412

9-6
IM 05P02D41-01EN
9.2 PID Selection Method
There are two PID selection methods. One is segment PID number selection and the
other is zone PID selection. When segment PID number selection is selected, the PID
number is set for each segment, and when zone PID selection is selected, the zone is
set and the PID constant is selected. The factory default is zone PID selection.
9.2.1 Segment PID Selection
Description
Segment PID control automatically switches PID settings to those set for each segment
of the program pattern (in programmed operations.)
The PID number is set for each segment at the same time as when the program pattern
is set.
during ramp-up and rampdown.
The following example shows how PID settings change in segment PID control.
PV
PID of goup 2
Seg.1
Seg.: Segment
1000
500
0
Seg.2 Seg.3 Seg.4 Seg.5 Seg.6 Seg.7
PID of group 1 PID of group 3
If the program is currently at
segment No. 5, control is
based on the PID constants
set for PID No. 1.
S.PID=2 S.PID=1 S.PID=3
S.PID: Segment PID number
► Segment PID Selection: 8.4 Switching PID
Setting Details
Parameter
symbol
Name
Display
level
Setting range Menu symbol
ZON Zone PID selection EASY
0: Segment PID selection
1: Zone PID selection (selection
by PV)
2: Zone PID selection (selection
by target SP)
4: Zone PID selection (selection
by SP)
5: Local PID selection
CTL
S.PID
Segment PID
number selection
EASY 1 to 4 PROG