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Table 6.3 Error Code List for AnUCPU (Continue)
Error
Error
Code
Massage
(D9008)
"CONTROL
40
-BUS ERR"
"SP.UNIT
41
DOWN"
Detailed
Error
CPU
Code
States
(D9091)
401
STOP
Due to the error of the
control bus which
connects to special
function modules, the
instruction cannot be
executed.
402
If parameter I/O
assignment is being
executed, special
function modules are
not accessible at initial
communication.
At error occurrence,
the head I/O number
(upper 2 digits of 3
digits) of the special
function module that
caused error is stored
at D9011.
411
STOP
Though an access was
made to a special
function module at
execution of the
instruction no response
is received.
412
If parameter I/O
assignment is being
executed, no response
is received from a
special function module
at initial
communication.
At error occurrence,
the head I/O number
(upper 2 digits of 3
digits) of the special
function module that
caused error is stored
at D9011.
123
Error and Cause
FROM
/
TO
FROM
/
TO
Corrective Action
Since it is a hardware
error of special function
module, CPU module or
base module, replace
and check defective
module(s).
Consult
Mitsubishi representative
for defective modules.
Since it is hardware
error of the special
function module to which
an access was made,
consult Mitsubishi
representative.

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