GE 489 Instruction Manual page 127

4 SETPOINTS
There are 4 analog inputs (4 to 20 mA, 0 to 20 mA, or 0 to 1 mA) that may be used to monitor transducers such as vibration
monitors, tachometers, pressure transducers, etc. These inputs may be used for alarm and/or tripping purposes. The
inputs are sampled every 50 ms. The level of the analog input is also available over the communications port. With the
489PC program, the level of the transducer may be trended and graphed.
Before the input may be used, it must be configured. A name may be assigned for the input, units may be assigned, and a
minimum and maxi-mum value must be assigned. Also, the trip and alarm features may be blocked until the generator is
online for a specified time delay. If the block time is 0 seconds, there is no block and the trip and alarm features will be
active when the generator is offline or online. If a time is programmed other than 0 seconds, the feature will be disabled
when the generator is offline and also from the time the machine is placed online until the time entered expires. Once the
input is setup, both the trip and alarm features may be configured. In addition to programming a level and time delay, the
PICKUP setpoint may be used to dictate whether the feature picks up when the measured value is over or under the level.
If a vibration transducer is to be used, program the name as "Vibration Monitor", the units as "mm/s", the minimum as "0",
the maximum as "25", and the Block From Online as "0 s". Set the alarm for a reasonable level slightly higher than the nor-
mal vibration level. Program a delay of "3 s" and the pickup as "Over".
GE Multilin
ANALOG INPUT1
ESCAPE
ALARM: Off
MESSAGE
ASSIGN ALARM
ESCAPE
RELAYS (2-5): ---5
MESSAGE
ANALOG INPUT1 ALARM
ESCAPE
LEVEL: 10 Units
MESSAGE
ANALOG INPUT1 ALARM
ESCAPE
PICKUP: Over
MESSAGE
ANALOG INPUT1 ALARM
ESCAPE
DELAY: 0.1 s
MESSAGE
ANALOG INPUT1 ALARM
ESCAPE
EVENTS: Off
MESSAGE
ANALOG INPUT1
ESCAPE
TRIP: Off
MESSAGE
ASSIGN TRIP
ESCAPE
RELAYS (1-4): 1---
MESSAGE
ANALOG INPUT1 TRIP
ESCAPE
LEVEL: 20 Units
MESSAGE
ANALOG INPUT1 TRIP
ESCAPE
PICKUP: Over
MESSAGE
ANALOG INPUT1 TRIP
ESCAPE
DELAY: 0.1 s
MESSAGE
489 Generator Management Relay
4.12 S11 ANALOG I/O
Range: Off, Latched, Unlatched
Range: Any combination of Relays 2 to 5
Range: –50000 to 50000 in steps of 1
Units reflect ANALOG INPUT 1 UNITS
Range: Over, Under
Range: 0.1 to 300.0 s in steps of 0.1
Range: On, Off
Range: Off, Latched, Unlatched
Range: Any combination of Relays 1 to 4
Range: –50000 to 50000 in steps of 1
Units reflect ANALOG INPUT 1 UNITS
Range: Over, Under
Range: 0.1 to 300.0 s in steps of 0.1
above
4
above
4-77