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13.2 Light Emitting Diodes (LED’s)
13.2.1 LED AL1 Warning
The LED „AL1“ blinks after a fault of class „W“ (warning) has occurred. Af-
ter manually clearing of the error message the LED „AL1“ goes off. Excep-
tions to this rule are the warnings 03/01, 03/02, 06/xx and 8E/xx where the
LED “AL1” will be automatically cleared after the end of the registration pe-
riod (Tm1/MP1).
13.2.2 LED AL2 Device fault
The LED „AL2“ blinks after a fault of class „F“ (device fault) has occurred.
The critical faults that can only be removed by the manufacturer.
13.3 Fault indication output
Apart from the optical display you have the possibility to forward error mes-
sages to the outside via the freely programmable outputs (mech. relays or
solid state outputs). The assignment of faults to outputs is done in
DLXPARA. Faults of class „W“ (warnings) correspond to alarm 1 (AL1) and
faults of class „F“ (device faults) correspond to alarm 2 (AL2). The fault in-
dications are active until the corresponding fault has been cleared. Excep-
tions to this rule are the warnings „03/01 – power failure“, „03/02 – power
dip“, „06/xx – Data memory: data erased” and “8E/xx – Energy register
overflow”, where the error will be automatically cleared and the fault indica-
tion output don’t be activated. These messages are stored in the alarm
buffer and in the spontaneous event buffer. During the alarms and power
failures the relay outputs return to their default (idle) state and the solid
state outputs are inactive.
13.4 Message buffers
All internal messages are stored in two different message buffers and de-
vice status:
•
Alarm buffer
: in addition to the LED display all alarms (faults) that have
occurred and that are not cleared are stored permanently in the internal
alarm buffer. The contents of this buffer can be shown via the „Main menu
- Display alarms“. The buffer can be cleared via “Main menu – Erase
alarms“.
•
Spontaneous event buffer
: all alarms (faults) and information messages
(at least the last 780) are stored permanently in the internal buffer for
spontaneous events. The contents of this buffer can be displayed via „Main
menu – Info – Spontaneous events“.
•
Device status:
All warnings and device faults are stored in device status
for each completed registration period (see appendix A, SCTM Protocol).
Warnings 03/02 (power dip) don’t stored in the device status (from version
1.04.03 up).