Digital Input Function: Speed Switch Trip; Digital Input Function: Load Shed Trip; Digital Input Function: Pressure Switch Alarm - GE 469 Manual

4 SETPOINT PROGRAMMING
When this function is assigned to a digital input, the following will occur. When a transition from stopped to start
is detected a timer will be loaded with the delay programmed. If that delay expires before a contact closure is
detected, a trip will occur. Once the motor is stopped, the scheme is reset.
Once the Load Shed Trip function is chosen for one of the assignable digital inputs, the setpoint messages
shown here will follow the assignment message. A trip relay may be selected. A contact closure on the switch
input assigned as Load Shed Trip will cause a trip within 100 ms.
Once the Pressure Switch Alarm function is chosen for one of the assignable digital inputs, the setpoint mes-
sages shown here will follow the assignment message. The Pressure Switch alarm feature may be blocked for
a specified period of time from a motor start. A value of zero for the block time indicates that the feature is
always active, when the motor is stopped or running. After the block delay has expired, the digital input will be
monitored. If a closure occurs, after the specified delay, an alarm will occur.
GE Power Management

4.4.10 DIGITAL INPUT FUNCTION: SPEED SWITCH TRIP

ASSIGN TRIP RELAYS:
ESCAPE
Trip
MESSAGE
SPEED SWITCH TRIP
ESCAPE
TIME DELAY: 5.0 s
MESSAGE
ASSIGN TRIP RELAYS:
ESCAPE
Trip
MESSAGE

4.4.12 DIGITAL INPUT FUNCTION: PRESSURE SWITCH ALARM

BLOCK PRES. SW. ALARM
ESCAPE
FROM START: 0 s
MESSAGE
PRESSURE SWITCH
ESCAPE
ALARM: Unlatched
MESSAGE
ASSIGN ALARM RELAYS:
ESCAPE
Alarm
MESSAGE
PRESSURE SW. ALARM
ESCAPE
DELAY: 5.0 s
MESSAGE
PRESSURE SW. ALARM
ESCAPE
EVENTS: Off
MESSAGE
469 Motor Management Relay
Range: Trip, Trip & Auxiliary2, Trip & Aux2 & Aux3,
Trip & Auxiliary3
Range: 1.0 to 250.0 sec., step: 0.1

4.4.11 DIGITAL INPUT FUNCTION: LOAD SHED TRIP

Range: Trip, Trip & Auxiliary2, Trip & Aux2 & Aux3,
Trip & Auxiliary3
Range: 0 to 5000 sec., step: 1 (0 indicates feature is active while
motor is stopped as well as running)
Range: Latched, Unlatched
Range: Alarm, Alarm & Auxiliary2, Alarm & Aux2 & Aux3, Alarm
& Auxiliary3, Auxiliary2, Aux2 & Aux3, Auxiliary3
Range: 0.1 to 100.0 sec., step: 0.1
Range: On, Off
4.4 S3 DIGITAL INPUTS
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