Mitsubishi A2CCPU User Manual

4. A2ccPu /MELSEC-A 1
4.3 Fautt Drtbction
4.3.1 SdfdIagW
The self-diagnosis function checks occurrence of errors and faults
by the A2C itself.
The A2C self-diagnosis function includes the following:
(a) CPU error
(b) MINI link line error
(c) Remote terminal error
(1) CPU error
CPU error includes faulty A2C, battery error, and operation
check error.
If
a CPU error is detected, the CPU error flag (M9008) is set and
the corresponding
error code (see Table 4.7.) is set in the CPU
error register (D9008).
(a) Operation at a detection of CPU error
If a CPU error is detected, sequence program operation is
processed in the following manner.
1) Stop-**--***** Sequence program operation stops if an
error is detected.
At this time, the outputs
(Y) of the remote
VO module and remote terminal module
are as indicated
below.
Remote VO module for
MINIS-3 link
OFF
ON
Output ON/OFF state is retained
OFF
Remote terminal module
OFF
-
I
2) Continue -.-.-Sequence program operation continues if
an
error is detected.
If an operation error is detected while a
sequence program is executed, an instruc-
tion causing the error is skipped to
con-
tinuously execute the program.
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Mitsubishi A2CCPU Specifications

General

Brand	Mitsubishi
Model	A2CCPU
Category	Controller
Language	English