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CET Electric Technology
Instantaneous Alarm
The Instantaneous Alarm becomes Active when the alarm condition is met and is automatically reset to
NORMAL when the alarm condition is no longer met. Instantaneous Alarm cannot be reset manually.
Latched Alarm
On the other hand, the Latched Alarm becomes Active when the alarm condition is met and will remain
in the ALARM state even after the alarm condition is no longer met. The Latched Alarm must be reset
manually. However, the Latched Alarm cannot be reset while the alarm condition remains.
Figure 4-5 Alarm Status
4.3.2 Alarm Counters
The PMC-592 is equipped with the following Alarm Counters which will increment every time a specific
alarm condition is met.
Counter Name
Description
Global Alarm Counter
Increment by 1 when any measurement has an alarm
Mains-I Global Alarm Counter
Increment by 1 when any Mains-I measurement has an alarm
Mains-II Global Alarm Counter
Increment by 1 when any Mains-II measurement has an alarm
Current-I Alarm Counter
Increment by 1 when any of the following Mains-I parameters has an alarm: I, I Demand, I
Harmonics, I Unbalance
Current-II Alarm Counter
Increment by 1 when any of the following Mains-II parameters has an alarm: I, I Demand, I
Harmonics, I Unbalance
Voltage-I Alarm Counter
Increment by 1 when any of the following Mains-I parameters has an alarm: U, U Harmonics,
U Unbalance
Voltage-II Alarm Counter
Increment by 1 when any of the following Mains-II parameters has an alarm: U, U
Harmonics, U Unbalance
RTD1 Alarm Counter
Increment by 1 when RTD1 has an alarm
RTD2 Alarm Counter
Increment by 1 when RTD2 has an alarm
DI1 Alarm Counter
Increment by 1 when DI1 has an alarm
DI2 Alarm Counter
Increment by 1 when DI2 has an alarm
DI3 Alarm Counter*
Increment by 1 when DI3 has an alarm
DI4 Alarm Counter*
Increment by 1 when DI4 has an alarm
*
Only valid when the PMC-592 is equipped with 4xDIs option and is available in Firmware V1.00.08 or later.
Table 4-9 Alarm Counters
4.3.3 Universal Hysteresis and Current ON/OFF Status
The Universal Hysteresis is a global parameter that is valid for all alarms except Dip/Swell and
Interruption alarms, which have their own Hysteresis parameters. The Current ON Threshold, Current
ON Delay and Current OFF are global parameters that are valid for all Mains and Branch Inputs.
Parameters
Description
Range/Default*