Mitsubishi A2CCPU User Manual

4. A2cCw /MELSEC=A
4.1.6 Operation processing at instantaneous power failure
The A2C detects instantaneous power failure when the input line
voltage to the power supply module falls below the defined range.
The A2C performs
two different operation processing depending
on the length of instantaneous power failure time across 20ms
allowable value.
(1) Instantaneous power failure within 20 ms
(a) The operation processing is stopped with the output
retained.
(b) The operation processing is resumed when normal status
is restored.
(c) The watch dog timer
(WDT) keeps
operation is
at a stop. For instance, if
time settings are 200 ms and
190
instantaneous power failure of 20 ms
error.
Power recovery
Inst. power failure occurs. (Sequence program continues.)
END 0
Xsequence
program
operation
Fig. 4.4 Instantaneous Power Failure within 20 mr
(2) Instantaneous power failure over 20 ms
The A2C is reset. The A2C performs the
initial start processing
as
it does when it is turned on or reset by the [RUNI key switch
operation.
I Inst. power failure occurs. Power failure (Initial start)
END 0
c-.- I
processing
;; -
L
Sequence
program
Initial operation
processing
The
A2C stops operation.
-,
Fig. 4.5 Instantlmemur Power Failure Over 20 ms

Mitsubishi A2CCPU Specifications

General

Brand	Mitsubishi
Model	A2CCPU
Category	Controller
Language	English