Mitsubishi MELSEC-A A1SCPUC24-R2, User Manual

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117
Table 6.3 Error Code List for A2ASCPU(S1/S30) and A2USHCPU-S1 (Continue)
Error
Massage
Error
Code
(D9008)
Detailed
Error
Code
(D9091)
CPU
States
Error and Cause Corrective Action
"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.
FROM TO
FROM TO