Mitsubishi MELSEC-A Series Programming Manual page 401

9. ERROR CODE LIST
Error
Error Massage Code
(D9008)
"FUSE BREAK 32
OFF"
(Checked
continuously.)
"CONTROL- 40
BUS ERR."
"SP.UNIT 41
DOWN"
"LINK UNIT 42
ERROR"
"I/O INT. 43
ERROR"
Table 9.5 Error Code List for the QCPU-A (A Mode) (Continue)
Detailed
Error CPU
Code States
(D9091)
— Stop or (1) There is an output module of which
Continue fuse is blown.
(set by (2) The external power supply for output
parameter) load is turned OFF or is not
connected.
401 STOP Due to the error of the control bus which
connects to special function modules,
the
FROM TO
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 D9010.
403 Hardware failure.
405 (1) The expansion cable is not properly
connected.
(2) QA1S base failure. 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.
411 STOP Though an access was made to a
special function module at execution of
the
FROM TO
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.
— Continue Two of data link module is specified as
master stations.
— STOP Though the interrupt module is not
loaded, an interrupt occurred.
Error and Cause
/ instruction cannot be
/ instruction no response
9 - 35
Corrective Action
(1) Check the FUSE BLOWN indicator
LED on the output module and
replace the fuse.
(2) Read detailed error code using a
peripheral device and replace the
fuse of the output module which
corresponds to the data (I/O head
number).
Or, monitor special registers D9100
to D9107 using a peripheral device
and replace the fuse of the output
module of which corresponding data
bit is "1".
(3) Check the ON/OFF status of the
external power supply for output load.
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.
Since it is hardware error of the special
function module to which an access was
made, consult Mitsubishi representative.
Specify one of data link module as a
master station and another as a local
station.
Since it is hardware error of a module,
replace and check a defective module.
For defective modules, consult Mitsubishi
representative.