136 MOTOR DRIVE ALARMS
ENTRY MENU LEVEL 1
MO TOR DRIVE ALARMS 2
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MO TOR DRIVE ALARMS 2
DRIVE TRIP MESS A GE 3
MO TOR DRIVE ALARMS 2
171)SPD TRIP EN ABLE
MO TOR DRIVE ALARMS 2
175)MISSING PULSE EN
MO TOR DRIVE ALARMS 2
172)SPEED TRIP TOL
MO TOR DRIVE ALARMS 2
173)FLD LOSS TRIP EN
MO TOR DRIVE ALARMS 2
174)DOP SCCT TRIP EN
MO TOR DRIVE ALARMS 2
177)O VERSPEED DELAY
MO TOR DRIVE ALARMS 2
176)REF EX CH TRIP EN
MO TOR DRIVE ALARMS 2
ST ALL TRIP MENU 3
MO TOR DRIVE ALARMS 2
181)A C TIVE TRIP MON
MO TOR DRIVE ALARMS 2
182)STORED TRIP MO N
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MO TOR DRIVE ALARMS 2
183)EX T TRIP RESET
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8.1 MOTOR DRIVE ALARMS menu
PIN number range 171 to 183
WARNING. All these alarms are generated
with semiconductor el ectronics. Local safety codes
may manda te electro-me chanical alarm syste ms.
All alarms must be tested in the final application
prior to use. The manufacturer and suppliers of the
PL/X are not responsible for system safety.
There are 16 alarms that continuously monitor
important parameters of the motor drive system.
10 of the alarms are permanently enabled and 6 of
the alarms can be enabled or disabled using this
menu. It also monitors the alarm status.
If any enabled alarm is triggered it is then latched
causing the drive to shut do wn and the main
contactor to be de-energised.
If the alarm has been disabled then it will not be
latched and will not affect the operation of the
drive, although it can still be monitored.
I f 171)SPEED TRIP ENABLE is disabled, then an
automatic switch to AVF is implemented for tacho
and/or encoder feedbac k.
There are 3 monitoring functions for all 16 alarms.
1) An active monitor prior to the latch
2) A monitor of the latched status of the alarm.
3) A displayed message showing w hich alarm
caused the drive to shut do wn. The displayed
message will automatically appear whenever the
drive is running, and can be removed from the
display by tapping the left key or starting the drive.
It may be re-examined using the DRIVE TRIP
MESSA GE menu. The message will be memorised
if the control supply is removed.
The PL/X alarms have a delay timer associated with
them such that they only become latched if the fault
condition persists for the w hole of the delay period.
Values of this delay period are given for the individual alarms. The quoted times are typical since the delay is
implemented in microprocessor " cycle time " units which vary with microprocessor loading. The arrival of the
alarms prior to the trigger can be accessed for advance w arning purposes using the active monitor windo w.
There is a USER ALARM on hidden PIN 71 2. This may be connected by the user to any flag, to trip the drive.
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