YOKOGAWA UT55A User Manual

11-9
IM 05P01C31-01EN
AlarmFunctions
11
FeedbackInputHighLimitAlarmandFeedbackInputLowLimitAlarm
These alarms can be used only for Position proportional type..
These alarms monitor the feedback input (resistance or current) value.
Thesettingrange
forthesealarmsis0.0to100.0%.
However, the setting range varies depending on whether the feedback input is a current
value(4to
20mA)orresistancevalue(100Ωto2.5kΩ).
 Currentvalue:4mAcorrespondsto0.0%,and20mAto100.0%.
 Resistancevalue(e.g.,1kΩ):Theresistancevaluewhenthevalveisfullyclosedafter
thevalvepositionadjustmentcorrespondsto0.0%,andtheresistancevaluewhenthe
valveisfullyopenedcorrespondsto100.0%.0Ωdoesnotcorrespondto0.0%,and1
kΩdoesnotcorrespondto100.0%.
Feedback input
ON OFF
ON
Contact type in the figure above: Energized when an event occurs (factory default).
Alarm hysteresis
Alarm hysteresis
OFF
Time
Feedback input
high limit
alarm setpoint
Feedback input
low limit
alarm setpoint
Feedback input
high limit
alarm output
Feedback input
low limit
alarm output
PVVelocityAlarm
PV
VT VT VT VT VT VT
PV velocity
alarm output
Time
An alarm occurs if the velocity
exceeds this inclination.
OFF OFF OFFON ON
Velocity alarm
time setpoint
VT1 to VT8
Velocity alarm
setpoint
Velocity alarm
setpoint
Velocity alarm
time setpoint
VT1 to VT8
Exceeds the velocity
Contact type in the figure above: Energized when an event occurs (factory default).
Monitors the variation of the measured value for 2 points by the time
interval set in VT.
ThePVvelocityalarmfunctiondoesnotworkthealarmhysteresis,thestand-byaction
and the alarm delay timer functions.
11.1SettingAlarmType

YOKOGAWA UT55A Specifications

General

Brand	YOKOGAWA
Model	UT55A
Category	Temperature Controller
Language	English