Mitsubishi Electric MELSEC-Q Series User Manual page 136

Error
Error
Code
Massage
(D9008)
"CONTRO
L-BUS 40
ERR"
Table 6.1 Error Code List (Continue)
Detailed
Error CPU
Code States
(D9091)
Due to the error of the
control bus which
connects to special
401
function modules, the
FROM TO
cannot be executed.
If parameter I/O
assignment is being
executed, special
function modules are not
accessible at initial
communication.
402
At error occurrence, the
head I/O number (upper 2
digits of 3 digits) of the
special function module
that caused error is
STOP
stored at D9010.
403 Hardware failure.
(1) The expansion cable
(2) QA1S base failure.
405
Error and Cause
/ instruction
is not properly
connected.
The base information
is different from that
obtained at power
on.
The failed base is
stored in D9068 as a
bit pattern.
The failed base is
stored in D9010 from
the upper stage.
102
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.
(1) Connect the
expansion cable
properly.
(2) The hardware failure
occurs in the special
function, CPU, or
base module.
Replace the module
and find the faulty
one. Describe the
problem to the
nearest system
service, retail store,
or corporate office,
and obtain advice.