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7. Alarms / Relays
7. Alarms / Relays
This device has 4 virtual alarms that can monitor one limit value in regard of an undercut or
exceedance. Each alarm can be allocated to an optional relay output S1-S2; furthermore
alarms can be controlled by events like e.g. hold or min/max-value.
Function principle of alarms / relays
Alarm / Relay x Deactivated, instantaneous value, min/max-value, hold-value,
totaliser value, sliding average value, constant value, difference
between instantaneous value and constant value or an activation
via the digital input or the [O]-key.
Switching threshold Threshold / limit value of the change-over.
Hysteresis Broadness of the window between the switching thresholds.
Working principle Operating current / Quiescent current
Operating current
By operating current the alarm S1-S2 is off below the threshold and on on reaching the
threshold.
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