Yokogawa PR300 Power and Energy Meter - Manual (Page 50)

Operation for Display of Measurement Items and Measurement Method
4-9 IM 77C01E01-01E
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4.5 Displaying Energy Values
Optional Integrating Function
The optional integrating function integrates the active power while the control signal for optional
integration is activated (ON for activating and OFF for deactivating). The operation for this signal can be
performed via communication or by digital input.
NOTE
● The control signal for optional integration of the PR300 with the demand measuring function can be
controlled only via communication. It is not possible by digital input.
● The active power below the integrated low-cut power cannot be integrated.
● Once the control signal for optional integration is controlled via communication, communication is
the only means for controlling that signal until system reset* is performed. The same applies to
control by digital input.
* System reset can be performed by turning off/on the power supply for the PR300 or by executing
remote reset via communication.
● When the system is reset, the optional integrated value is reset to 0.
●
If power failure occurs during integration, an optional integrated value is reset to 0.
Example operation of the control signal for optional integration via communication
Digital input
ON Digital input
OFF
Start
command Stop
command
Data update
Time
The active power during this time period is integrated.
These control
signals are invalid.
Example operation of the control signal for optional integration by digital input
Start
command
Digital input
ON Digital input
OFF
The active power during this time period is integrated.
Stop
command Data update These control
signals are invalid.
Time
Digital input
Number of inputs: 1
Input signal: ON signal 4.5 to 25 V DC, OFF signal within Ϯ1 V DC
Maximum integrated value
99999 Wh (After the integrated value reaches this maximum value, it returns to “0.”)
Data update
When the control signal for optional integration is turned off and then turned on:
The displayed measured value is reset to 0, and integration starts. The integrated value before
resetting (previous value) can be confirmed via communication.
When the control signal for optional integration is turned on for a while and turned off later:
The displayed measured value is the integrated value. This value display is retained until the control
signal for optional integration is turned on again.