Installation and Commissioning SWT 3000 Equipment Manual
Possible reasons for the alarms
Table 61: Alarm relays and possible alarm reasons
Relay Possible Reason Remark
GALR
(general alarm)
Normal operation interrupted
PU3f Measuring point alarm (MAL)
Transmission path faulty no alternative path
Primary and secondary path not available.
IFC Test operation
Module alarm resp. configuration alarm
additional Pre-Alarm
additional EALR
additional EALR and Pre-Alarm
OK LED on PU3 green blinking
OK LED red
EALR
(receive alarm)
Guard alarm, transmission path not available no
alternative path.
Guard alarm Primary and secondary path not
available
Time limit for the command output exceeded
Output of the unblocking impulse (when acti-
vated) at operation mode 3...5x
additional GALR
additional GALR and Pre-Alarm
The command output is interrupted. The
alarm is deactivated when the command
transmission is cancelled
NDAL
(Pre-Alarm)
Primary path not available but secondary path
existing.
Primary and secondary path not available
Power fail of one power supply in case of redun-
dant power supply
LIA signal to noise alarm
LID bit error alarm (bit error rate is > 1x10
-3
)
Switch NU-Relais on GAL is activated in the
alarms control configuration
Time limit for the command input exceeded
Switch over to the alternative path
additional GALR and EALR
No interrupt as long as the second power
supply is working
Command outputs blocked with default
settings
Command outputs blocked with default
settings
Additional GALR ref. to table 62 on page
64. This function is not available when
two transmission path are used!
The command transmission is interrupted.
The alarm is deactivated when the com-
mand input is cancelled.
Page - 62 Edition p3_3_2x 08/09 © SIEMENS AG 2008
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