Mitsubishi A2USCPU(S1), User Manual

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11 - 17
TROUBLESHOOTING 11.
Table 11.1
Error Code List for the AnUCPU, A2US(H)CPU, A2ASCPU and A2USH board (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 D9011.
"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 — STOP (1) Either data link module is loaded to
the master station.
(2) There are 2 link modules which are
set to the master station (station 0).
(1) Remove data link module from the
master station.
(2) Reduce the number of master
stations to 1.
Reduce the link modules to 1 when
the 3-tier system is not used.
"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.
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