Weidmuller PTX800D - Scalable pulse and frequency counter - Manual (Page 8)

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Alarm action
High alarms are active above the setpoint and low alarms are active
below the setpoint. Total alarms are always ‘high’ type, so this setting
is not shown.
Deadband
This parameter sets the “hysteresis” for an alarm channel; the alarm will
clear above or below the setpoint to prevent chatter when the rate level
passes the setpoint. The minimum deadband is one display count.
Total alarms do not need a deadband setting.
Alarm output energisation options
There are many applications where it is important to raise an alarm
if the instrument power supply is cut off. Normally energised coil
operation allows for this application.
Alarm timer delays
Sets the minimum time that an alarm condition must be present to be
recognised.
Setpoint security
You can change the setpoints from the front panel. If you want to
disable this feature, switch on the setpoint security.
Alarm reset sequence
Alarms normally reset automatically when a trip condition has passed.
Manual reset requires the operator to press the appropriate key before
the alarm will clear. The alarm status LED flashes until the alarm is
acknowledged and then remains on until the trip condition is gone.
Total or rate output and range
To set up the analogue outputs you must first choose if the output is
going to be proportional to the rate or the total. After that you can set
up the portion of the rate/total range that you want to retransmit.