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5. INSPECTION AND MAINTENANCE
5
−
23
Table 5.9 Table of Error Codes (cont.)
Error
Contents (BIN)
of Special
Register D9008
CPU
Status
Error Description and Cause Corrective Action
"I/O INT. ERROR" 43 STOP
An interrupt was generated but no
interrupt module is mounted.
(1) A hardware error exists in one of
the modules. Replace the
module and check the defective
module for defects. Contact your
nearest Mitsubishi
representative with details.
"SP. UNIT LAY.
ERR."
44 STOP
(1) Three or more computer link
modules are loaded for one
A171SHCPUN/A172SHCPUN
CPU module, or seven or more
computer link modules are loaded
for one A173UHCPU CPU
module.
(2) Two or more A1SJ71AP21/R21s
or A1SJ71T21Bs are loaded for
A171SHCPUN/A172SHCPUN, or
three or more A1SJ71AP21/R21s
or A1SJ71T21Bs are loaded for
A173UHCPU.
(3) Two or more interrupt modules
mounted.
(4) The I/O allocation set in the
peripheral device parameters
allocate a special-function module
where an I/O module is mounted,
or vice-versa.
(1) Reduce computer link modules
to two or less for
A171SHCPUN/A172SHCPUN
or to six or less for
A173UHCPU.
(2) Reduce A1SJ71AP21/R21 or
A1SJ71T21B to one or less for
A171SHCPUN/A172SHCPUN
or to two or less for
A173UHCPU.
(3) Mount 1 interrupt module.
(4) Change the I/O allocation set in
the peripheral device
parameters to match the
special-function modules
mounted.
"SP. UNIT ERROR" 46
STOP
(RUN)
(1) An attempt was made to access
(by executing FROM and TO
instructions) a position where no
special-function module is
mounted.
(1) Read the error step with the
peripheral device and check and
modify the FROM and TO
instructions at this step.
"LINK PARA.
ERROR"
47 RUN
(1) The contents written to the link
parameter area after parameter
setting at a peripheral device
differ from the link parameter
contents read by the CPU.
(2) The total number of slave stations
is set to zero.
(1) Write the parameters again and
check.
(2) If the same error is displayed
again, a problem exists in the
hardware.
Contact your nearest Mitsubishi
representative with details.
"OPERATION
ERROR"
50
RUN
(STOP)
(1) BCD conversion result exceeds
the prescribed limit (9999 or
99999999).
(2) Operation not possible because a
setting was outside the prescribed
device range.
(3) A program used a file register for
which the file register size is not
set.
(1) Read the error step with the
peripheral device and check and
modify the program at this step.
(Check the device setting range,
BCD conversion range, etc.)
"BATTERY ERROR" 70 RUN
(1) Battery voltage is below the
prescribed limit.
(2) Battery lead connector is not
connected.
(1) Replace the battery.
(2) Connect the battery lead
connector to use the internal
RAM or memory back-up
function.
(11) Reading error codes
The error code can be read from a peripheral device after an error occurs.
Refer to the peripheral device operating manual for details.