Display And Operation Of Digital Input/Output Status; Releasing The Digital Input Latch; Preventing Maximum Value Update By Motor Starting Current - Mitsubishi Electric ME96SSHA-MB User Manual

5. Operation
5.2 Usage According to Purpose (Alarm, Periodic Active Energy, Rolling Demand, Operating
Time, Password, etc.)

⚫ Display and operation of digital input/output status

The digital status can be displayed by inputting the switching signal of the breaker and the alarm signal of the over current
relay to the digital input (DI) terminal.
The digital output (DO) terminal opens and closes the contact by communication control.
To display the digital input/output status, the digital input/output status display setting should be configured in advance.
(For setting of the digital input/output display, refer to page 45.)
■ Display examples
＜When the optional plug-in module "ME-0052-SS96" is installed＞
Digital input display（DI1 to DI5）
These are displayed when the
■ Digital input reset method
The method for maintaining the digital input status differs according to the digital input reset method.
Reset method
If the digital input turns OFF (Open), the digital input status automatically turns OFF
Auto reset
(Open).
(Auto)
After it is detected that the digital input is ON (Closed), the digital input status is kept ON
(Closed) until executing latch cancelation, even when the digital point input turns OFF
Latch (Open).
(HoLd) When alarm contact such as ACB are input, alarm generation
status continues on this measurement instrument even when an alarm
generation stops so that an alarm cannot be missed.
■ Digital input conditions
The following are the digital input conditions.
Input conditions
Rating
ON (Closed)
/ OFF (Open) time

⚫ Releasing the digital input latch

Holding down the
(DI) latches collectively.
The digital input latches can be released also via communication.

⚫ Preventing maximum value update by motor starting current

When the motor current is monitored, use the motor starting current delay function to prevent maximum value
update and alarm generation for the current, active power, reactive power,
due to the motor starting current. It is necessary to set in advance to use the motor starting current delay function.
(About settings, refer to page 36.)
■
Movement when the motor starting current delay function is used
<Motor starting current detection>
When the current is over the motor
starting current value, the motor
current starting current delay time
counter begins.
Note 1: Set the motor starting current value to a value lower than the lower limit value considering changes in
the load current during operation.
Note 2: When the input current is below the motor starting current value, the minimum value update stops.
Digital output display（DO1、DO2）
button is pressed repeatedly in the operation mode to switch the measurement displays.
Terminals DI
24VDC(19 to 30VDC),7mAor less
30ms or longer for both ON and OFF
button for 2 seconds while the digital input display (DI) is displayed releases the digital input
Motor starting current delay time
Current
Motor starting
current
Current upper
limit alarm value
Motor starting
current value
：Digital opened
：Digital closed
Digital input/ output status
Cancelation method
apparent Power
<Motor starting current delay>
The maximum values for the current, active
power,reactive power and power factor are
not updated during the motor,reactive power
and power factor starting current delay time.
Also, no alarm generated even if it is over the
upper limit alarm value.
Time
75
,and power factor