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Table 6.1 Error Code List for A1SCPUC24-R2 (Continue)
Error Code
Error Message
"I/O INT.
ERROR"
"SP. UNIT LAY.
ERROR."
"SP. UNIT
ERROR"
(Checked at the
execution of
FROM and TO
instructions)
CPU
(D9008)
States
43
Stop
44
Stop
Stop or
Continue
46
(set by
para-
meter)
Error and Cause
Although the interrupt
module is not loaded,
interruption has
occurred.
(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.
Access (execution of
to
instruction)
FROM
TO
has been made to a
location where there is
not special function unit.
92
Corrective Action
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 to two or
less.
(2) Reduce the data
link modules to one
or less.
(3) Reduce the
interrupt module to
one.
(4) Re-set the I/O
assignment of
parameter setting
by use of peripheral
devices according
to the actually
loaded special
function module.
(5) Review the
input/output
numbers, and
remove the
modules at the
input/output
numbers beyond
the number of
input/output points
or GOT.
Read the error step by
use of peripheral
equipment, and check
and correct the content
of
or
FROM
TO
instruction at that step.
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