Operation Processing During Momentary Power Failure; When Momentary Power Failure Time Is Within The Allowable Range - Mitsubishi Electric Q12DCCPU-V User Manual

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SPECIFICATIONS
3.4.4

Operation processing during momentary power failure

The C Controller module detects a momentary power failure when the input power voltage
supplied to the power supply module falls below the specified range.
On detection of a momentary power failure, the following operation is performed.

(1) When momentary power failure time is within the allowable range

When a momentary power failure occurs, the output status is held and the operation
stops.
After power is restored, the error information is registered to the event history file.
(The initial time only)
(a) Confirming the number of detections
(b) After recovering from a momentary power failure
(2) When power failure lasts longer than the allowable momentary power
failure time
Initial start is needed for the C Controller module.
The same operation processing as the one of the following is performed.
The C Controller module counts how many time momentary power failure has
been detected and holds the data.
The number of momentary power failure detections can be confirmed by the
QBF_ReadStatusEx function.
The operation processing is resumed when the module recovers from a
momentary power failure.
• Powering on the C Controller system
• Resetting by the RESET/SELECT switch
• Remote resetting by C Controller setting utility or QBF_Reset function
3.4.4 Operation processing during momentary power failure
Q12DCCPU-V Q06CCPU-V
3.4 Operation Processing
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