
11. TROUBLESHOOTING
11 - 14
MELSEC-A
Table 11.1 Error codes (Continue)
Error Message
Error
Code
(D9008)
Detailed
Error
Code
(D9092)
CPU
States
Error and Cause
Corrective Action
"SP. UNIT LAY.
ERROR."
44
Stop
(1)
Three or more computer link
modules are installed for a single
CPU module.
(2)
Two or more MELSECNET (II),
MELSECNET /B or
MELSECNET /10 data link
modules are installed.
(3)
Two or more interrupt modules
are installed.
(4)
A special function module is
installed to a slot assigned to the
I/O module with parameter
setup
of the peripheral device,
or vice versa.
(5)
The I/O module or special
function module is installed
outside the following I/O number
ranges, or GOT is connected to
the bus.
A1SH, A1SJHCPU: X0 to XFF
A2SHCPU(S1): X0 to X1FF
(1)
Reduce the number of computer
link modules to within two.
(2)
Reduce the number of
MELSECNET (II), MELSECNET
/B and MELSECNET /10 data link
modules to one.
(3)
Reduce the number of interrupt
modules to one.
(4)
Using the peripheral device,
correct the parameter I/O
assignment according to the
actual state of installation of the
special function modules.
(5)
Examine the I/O number and
remove the modules and GOT
installed outside the range
specified on the left.
(1)
Access (execution of FROM or
TO instruction) has been made
to a location where no special
function module is installed.
(1)
Use the peripheral device to read
and correct the FROM and/or
TO instruction at the error step.
"SP. UNIT
ERROR"
46
462
Stop
or
Contin
ue
(set by
para-
meter)
(1)
There is inconsistency in the
module name between the
special instruction for CC-Link
and I/O assignment of the
parameter.
(2)
The location designated by the
special instruction for CC-Link is
not the master module.
(1)
Correct the module name of I/O
assignment of the parameter to
that of the special instruction for
CC-Link.
(2)
Use the peripheral device to
check and correct the special
instruction for CC-Link at the
error step.
"LINK PARA.
ERROR"
47
Stop
or
Contin
ue
(set by
para-
meter)
(1)
There is inconsistency for some
reason between the data, which
is written by the peripheral
device in the parameter area of
the link under link range
designation using parameter
setup, and the link parameter
data read by the CPU module.
(2)
The total number of stations is
set at “0.”
(1)
Write parameters and check
again.
(2)
If the error persists, there is a
fault in hardware. Consult
Mitsubishi representative.
Содержание A1SH
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