Demand Power; Self-Diagnostic Function; Power Failure Memory - Panasonic KW1M-H User Manual

8.6.1 Demand power

Demand span
Span system
Data update cycle
Power input type
Measurement item
Display
Saved data (main unit memory)
Demand alarm *2
Demand alarm stand-by time

Power Failure Memory

*1 In order to use demand function by pulse input, input pulse with applicable pulse width according to
8.2.2 Pulse input. If other pulse is input, it doesn't work the demand function correctly.
*2 Demand alarm
When the present demand or estimated demand exceeds the setting value, it notifies by the output
and the indication. You need to set 'DEM' with unit for pulse output setting in order to output.
*3 In case of a power failure, it stops monitoring demand and demand alarm (demand alarm off).

8.7 Self-diagnostic function

If an error occurs, the following indication will be given.
Indicator
Err0 CPU error
Err1 Memory error*
*Includes the possibility that the EEPROM's life has expired.
8.8 Power Failure Memory
Eco-POWER METER memories integrated electric power and working status to internal EEPROM
until when power supply is off. (Power failure guarantee)
And every time to change each setting, each setting value is memorized to internal EEPROM at the
same time. Therefore, change setting frequently makes EEPROM's life short. Avoid to usage like this.
*Especially be careful if you set by communication.
30 minutes span fix
synchronized with the main unit clock
(synchronized with the frequency of measured voltage)
Clock correction; available / not available
1 minute
Current transformer (CT) input / Pulse input
Present demand (update every 1 second),
Estimated demand (update every 1 minute)
Present demand, Estimated demand, Demand setting value
Ratio of estimated demand
Demand log, Monthly max. demand log, Max. demand
Monthly max. demand log 13 records (13 months)
Demand log 336 records (7 days)
Indication
Output
1 to 30 min.
Monthly max. demand log, Demand log, Present demand,
Max.demand
Meaning Output status
OFF
[D] blinking on the upper line
1-circuit
Pulse output (pulse output terminal)
Turn the power off and then on again.
EEPROM life ended. Replace the unit.
76
KW1M-H Eco-POWER METER
(selectable with setting mode)
*1
(selectable with setting mode)
To recover