YOKOGAWA UT55A - Chapter 13: Display, Key, and Security Functions; 13.1 Setting Display Functions

13-1
IM 05P01C31-01EN
Display, Key, and Security Functions
13
13.1 Setting Display Functions
13.1.1 SettingActiveColorPVDisplayFunction
TheactivecolorPVdisplayfunctionchangesthePVdisplaycolorwhenaneventoccurs.
Description
LinktoAlarm
ThePVdisplaycolorchangesbylinkingtothealarm1oralarm2.
The following is an example of operation linking to alarm 1.
Setthealarm-1
typeto“PVhighlimitalarm”andalarm-1setpointto“80°C.”
WhentheactivecolorPVdisplayswitchissetto”2,”PVdisplaycolorchangesfromwhite
toredifPVexceedsthealarm-1setpoint.
The red-to-white switching action can be set.
°C
Time
PV color: redPV color: white PV color: white
Alarm-1 setpoint
A1 = 80°C
PV
75°C
Alarm-1 hysteresis
ChangebyDeviation
ThePVdisplaycolorchangesbydeviation(PV–SP).
SetthePVcolorchangehighlimitto“10°C”andthePVcolorchangelowlimitto“5°C”
asdeviationbandforthecurrenttargetsetpoint“50°C.”PVdisplaycolorchangesfrom
whitetoredifPVisoutofthedeviation.
The red-to-white switching action can be set. There is no hysteresis.
°C
Time
Target setpoint
SP = 50°C
60°C
45°C
PV
PV color: redPV color: red PV color: red
PV color: white
PV color: white
Parameter “PCH” (PV color change high limit) = 10°C
Parameter “PCL” (PV color change low limit) = 5°C
Chapter13Display,Key,andSecurityFunctions