Weidmuller PTX800A - Configurable counter and totalizer - Handbuch (Seite 33)


Alarmaction
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.
Alarmoutputenergisationoptions
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.
Alarmtimerdelays
Sets the minimum time that an alarm condition must be present to be
recognised.
Setpointsecurity
You can change the setpoints from the front panel. If you want to
disable this feature, switch on the setpoint security.
Alarmresetsequence
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.