Despatch MIC1422 Controller - Manual (Page 32)

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4.3 Override Feature
While the instrument is being used with either Dual Setpoint operation or Remote
Setpoint operation, the Override feature is available. This enables the active setpoint
selected by the digital input to be manually overridden from the keypad. To engage the
Override feature, with the instrument displaying the desired setpoint, press the UP and
DOWN keys simultaneously. This will cause the left-most character of the lower display
to show a flashing " ". This indicates that the display setpoint is now the active
setpoint, regardless of the state of the digital input. To cancel an override condition,
simply press the UP and DOWN keys again with this display shown.
4.4 Alarm Status Display
If any alarms are active, the user may view the alarm status by pressing the SCROLL
key until the lower display shows the legend ALSt. The upper display will have the
following format:
4.5 Over-Range I Under-Range Display
If the process variable attains a value higher than the input scale maximum
limit, the upper display will show:
If the process variable attains a value lower than the input scale minimum,
the upper display will show: