Mitsubishi MELSEC-A Series Programming Manual page 370

9. ERROR CODE LIST
Table 9.1 Error Code List for the An, AnN, A3H, A3M, A3V, A0J2H, AnS, A2C, A73, A52G, A1FX and A3N board (Continue)
Error Code
Error Message
(D9008)
"UNIT 31
VERIFY ERR. "
(Checked
continuously)
"FUSE BREAK 32
OFF"
(Checked
continuously)
"CONTROL- 40
BUS ERR. "
(Checked at the
execution of
FROM and TO
instructions)
"SP. UNIT DOWN" 41
(Checked at the
execution of
FROM and TO
instructions.)
"LINK UNIT 42
ERROR"
"I/O INT. ERROR" 43
"SP. UNIT LAY. 44
ERROR."
CPU States Error and Cause
Stop or I/O module data are different from those
Continue at power-on.
(set by The I/O module (including the special
parameter) function module) is incorrectly loaded or
has been removed, or a different unit
has been loaded.
Stop or (1) A fuse is blown in an output modul.
Continue (2) The external output supply for output
(set by load is not turned off or not
parameter) connected.
Stop The and
FROM
be executed.
Error of control bus with special function
module.
Stop When the
FROM
executed, access has been made to the
special function module but the answer
is not given.
The accessed special function module is
defective.
Stop The data link module is loaded in the
master station.
Stop Although the interrupt module is not
loaded, interruption has occurred.
Stop (1) Three or more computer link units
are loaded with respect to one CPU
module.
(A1SCPU24-R2 is also counted as
one unit.)
(2) Two or more data link modules are
loaded.
(3) Two or more interrupt units are
loaded.
(4) A special function module is
assigned in place of an I/O module,
or vice versa, at I/O assignment of
parameters on peripheral devices.
(5) The input/output modules or special
function modules are loaded at the
input/output numbers exceeding the
number of input/output points, or
GOT is connected via bus line.
9 - 4
(1) Among special registers D9116 to
(2) When the present unit arrangement
(1) Check the fuse blown indicator LED
(2) Among special registers D9100 to
(3) Check if the external power supply
instructions can-not Since this is a hardware error of a
TO
special function module, CPU module,
or base unit, replace the module and
check the defective module, consult
Mitsubishi representative.
or instruction is Since this is an accessed special
TO
function module error, consult Mitsubishi
representative.
Remove the data link module from the
master station. After correction, reset
and start from the initialization.
Since this is a hardware error of a
specific module, replace the module and
check the defective module, consult
Mitsubishi representative.
(1) Reduce the computer link modules
(2) Reduce the data link modules to one
(3) Reduce the interrupt module to one.
(4) Re-set the I/O assignment of
(5) Review the input/output numbers,
Corrective Action
D9123, the bit corresponding to the
module of verify error is "1".
Therefore, use peripheral equipment
to monitor the registers and check
for the module with "1" and make
replacement.
is OK, perform reset with the reset
switch.
of output module and change the
fuse of module of which LED is on.
D9107, the bit corresponding to the
unit of fuse break is "1"
Replace the fuse of a corresponding
module.
Monitor and check it.
for output load is turned on or off.
to two or less.
or less.
parameter setting by use of
peripheral devices according to the
actually loaded special function
module.
and remove the modules at the
input/output numbers beyond the
number of input/output points or
GOT.