Module Power Supply Voltage Drop Detection Function; External Power Supply Monitoring Function - Mitsubishi Electric NZ2GN2B1-32D User Manual

8.5
Module Power Supply Voltage Drop Detection
Function
Detects a voltage drop of the module power supply.
This function makes troubleshooting easy when the voltage of power supplied to the I/O module drops or when poor
connection in the wiring occurs.
Operation
The module power supply voltage drop detection function starts from the time 500ms passes after the I/O module is powered
on.
When the module power supply voltage drops below 20.4VDC, a module power supply voltage drop error (error code: 0240H)
occurs.
Precautions
The voltage to be detected varies depending on the environment.
When an error is detected, since the power supply environment is out of specification range, the operation is not guaranteed.
A power supply voltage drop is not detected in the event of a sudden power failure or when power-off operation is performed.
8.6

External Power Supply Monitoring Function

Monitors the ON/OFF status of the external power supply.
Setting procedure
Sets whether to enable or disable the external power supply monitoring function with External power supply monitor request
(RWw2.b9).
Remote register
External power supply monitor request (RWw2.b9)
The setting status of the external power supply monitoring function can be checked with External power supply monitor status
(RWr2.b9). For details, refer to the following.
Page 117 External power supply monitor status (RWr2.b9)
Operation
When External power supply monitor request (RWw2.b9) is turned on, if a state of external power supply being turned off is
detected, an external power supply OFF error (error code: 0104H) occurs.
Precautions
When using the external power supply monitoring function, check that the external power supply stabilizes before turning on
External power supply monitor request (RWw2.b9). Also, turn off External power supply monitor request (RWw2.b9) before
turning off the external power supply.
8 FUNCTIONS
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8.5 Module Power Supply Voltage Drop Detection Function

State
ON
OFF
Setting value
External power supply monitoring function enable
External power supply monitoring function disable