YOKOGAWA UTAdvanced UP55A, User Manual

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8-61
IM 05P02C41-01EN
Control Functions
8.4.6 Setting Hysteresis at Time of PID Switch
Description
When the zone PID selection is selected, hysteresis at time of each zone switch can be
set.
The following shows the operation example of hysteresis at time of zone switch.
Reference point 1
PV
Hysteresis
0.5% of PV input range span
PID of group 1 PID of group 2 PID of group 1 PID of group 2
Setting Details
Parameter
symbol
Name
Display
level
Setting range Menu symbol
RHY
Zone PID switching
hysteresis
STD
0.0 to 10.0% of PV input
range span (EUS)
ZONE
Note1: In Cascade control, the LP2 lamp is lit while the Loop-2 parameter is displayed.
8.4.7 Switching PID Irrespective of Operation Mode
Description
When the local PID selection is selected (ZON = 5), the PID group set in the local PID
number selection (L.PID) is used, irrespective of the operation mode.
Setting Details
Parameter
symbol
Name
Display
level
Setting range Menu symbol
ZON
Zone PID
selection
STD
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
L.PID
Local PID
number selection
EASY 1 to 8 LOC
PID
PID number
(display only)
EASY 1 to 8 MODE
Note 1: A currently-used PID number is displayed for the parameter PID.
8.4.8 Switching PID by Contact Input
Description
When the local PID selection is selected (ZON = 5), PID can be switching by contact
input.
Setting Details
► Contact input assignment: 12.1 Setting Contact Input Function
8
8.4 Switching PID