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D1M 20
POWER METER USER MANUAL
Variable
Hysteresis
Hysteresis
Event
Alarm Digital Output
Event
Event
Event
MAX
MIN
Delay
Delay
Threshold
Threshold
7.4.Alarms (ALAM)
ALARM
configuration is used to get info on threshold violations of specific parameters. When the
measurement quantity exceeds the limit, an alarm will be given to prompt users to make corresponding
treatment measures in time.
Each alarm can only be triggered when certain conditions are met. The following graph describes the
process of triggering and releasing an alarm:
When the value of the alarm variable exceeds the threshold and the delay, the alarm will be generated;
and when the alarm variable recovers to the normal range and exceeds the hysteresis and delay, the alarm
will be released. Alarm can be connected to certain DO to control the alarm signal output at the DO. If the
alarm is stored in flash, it can be viewed later in the read data menu. When the device is in alarm state,
ICON
will be displayed.
Each D1M 20 provides up to 15 alarms; following parameters are available:
Menu
Description
Menu
Description
NUM
Select which alarm will be edited, max 15 alarms can be selected
VARIABLE
Select alarm variable
PHASE
Select the phase of alarm variable
TYPE
Type of alarm: cross-up (MAX) or cross-down (MIN)
SETPOINT
Set threshold
DELAY
Delay time
HYSTERESIS
Set hysteresis
LOG
Storing the alarm
PORT
Select digital output port for alarm
