Mitsubishi MELSEC-A series, Programming Manual

Page: 401 / 508

9 - 35
ERROR CODE LIST 9.
Table 9.5 Error Code List for the QCPU-A (A Mode) (Continue)
Error Massage
Error
Code
(D9008)
Detailed
Error
Code
(D9091)
CPU
States
Error and Cause Corrective Action
"FUSE BREAK
OFF"
(Checked
continuously.)
32 — Stop or
Continue
(set by
parameter)
(1) There is an output module of which
fuse is blown.
(2) The external power supply for output
load is turned OFF or is not
connected.
(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.
"CONTROL-
BUS ERR."
40 401 STOP Due to the error of the control bus which
connects to special function modules,
the
/ instruction cannot be
executed.
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.
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.
(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.
"SP.UNIT
DOWN"
41 411 STOP Though an access was made to a
special function module at execution of
the
/ instruction no response
is received.
Since it is hardware error of the special
function module to which an access was
made, consult Mitsubishi representative.
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.
"LINK UNIT
ERROR"
42 — Continue Two of data link module is specified as
master stations. Specify one of data link module as a
master station and another as a local
station.
"I/O INT.
ERROR"
43 — STOP Though the interrupt module is not
loaded, an interrupt occurred. Since it is hardware error of a module,
replace and check a defective module.
For defective modules, consult Mitsubishi
representative.
FROM TO
FROM TO