02/2014
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6.7.
Monitoring conditions
A deviation fault b/- (0.2 - 5.0) % is configured for mA measuring input
and analogue output
respectively.
A tolerance beyond that activates an
alarm
for maintenance requirement by the relay 3 and a constant light
alarm LED on the front of the unit.
All faults in 6 fault sources, identifiable in the system, are summarized together in the screen. Each fault
source has optionally different settings for analogue output and the alarm outputs are to be assigned
determining behaviour in the fault event. The configuration for the alarm outputs (function, alarm type etc.)
takes place exclusively in the
Alarm output
screen, where defined alarm outputs are dimmed out
no function
switched off and in the
System controlling
screen. In the fault event, the functions of analogue output and
alarm outputs defined are overlaid in the
System controlling
screen to ensure controlled behaviour.
Alarm outputs can be switched off by
no function.
Therefore they are not available in the
mask
System controlling
for maintenance requirement alarm.
No fault source is assigned to the 16-bit processor, because in the fault event for analogue output and alarm
outputs, no safe condition can be guaranteed. It is of course possible with hardware operation, that a failure of
the master processor could activate the SIL2 alarm for maintenance requirement.
