YOKOGAWA UT55A - Setting Hysteresis at Time of PID Switch; Switching PID by Contact Input

8-97
IM 05P01C31-01EN
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byContactInput
Description
PID can be switching by contact input.
Setting Details
► Contact input assignment: 12.1 Setting Contact Input Function
8
8.4SwitchingPID