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12.
TROUBLESHOOTING
MELSEC-A
1
Error
07H
Chuacter
1
error
PC CPU
08H
access
1
error
11 H
I
Mode error
10H
Special
function
designa-
tion
error
Program
number
designa-
tion
error
PC CPU
number
error
Error Description
Character error received.
A character other than 'A to 2". '0 to
9',
"
' and control codes in Section 8.4.5 (1)
h i s been
Buffer memory is unable l o make communica-
tions with the PC CPU.
The PC CPU is not the type mentioned in
Section 2.2.
Defined PC CPU number does not exist.
The PC CPU number designated with the
protocol was not the self (FFH) or a sta-
tion number set with the MELSECNET link
oarameters.
--
Incorrect eommLn catlons bothccn an
AlSJ71C24 ano
a
A I S C P J
Aftcr the A1 S-71 C24 has correctly
rcecwed a rcqdest from tno comp,ter,
nor.
ma data commmncal
ons
is not oerformed
between the A1SJ71C24 and AISCPU due
l o noise or some other reason.
Special function module designation error.
A special function module, having buffer
memory and capable of performing data
c~mmur~ications, is not placed in the desig-
nated special function module number's
oosition. Or the module number is wrona.
-
Error in the designation of a sequence pro-
gram step number.
A step number was designated which lies
outside the program range designated by
the PC CPU ~arameters.
Remote
RUNISTOP
impossible.
Remote STOPIPAUSE has already been
executed from another module (such as
another AlSJ71 C24).
Access was made to a station with which
communications has been discontinued.
~-
Memory access to the special function module
cannot be made (far command TR. TW).
( 1 ) Special function module control bus error.
(2) Special function module breakdown.
-
Indicator
LED No.
PRO
(LED No.13
cm
(LED No.11
CIN
(LED No.11
-
CIN
(LED No.11
PRO
(LED No.1:
PRO
(LED No.1:
CIN
(LED Na.11
CIN
(LED No.1 t
-
Corrective Actions
Check and correct data.
Use a PC CPU wnich can per.
form data communications.
Chanae the PC CPU number
lo 1ne"self (FFH) or a station
n m b o r set witn tho MELSEC.
NET l:nk parameters, and ros-
tart data comm~nicatons.
Restart data communications.
If the error recurs, (a) check
for noise andlor other causes.
or (b) replace the
A1SJ71C24. Restart data
communications.
Check control protocol data or
change the special function
module location.
Designate a step number
which lies within the desia-
nated range, or change tiie
parameters and restart trans-
mission.
Check for and reset remote
STOPIPALSE from another
mo0L.e.
Check the state of data link.
AlSCPU. base unit. sDecial
.
.
function module or
At SJ71C24 hardware fault.
Cansuit the nearest Mitsubishi
re~resentative.
-
(1) Error codes OOH to 08H are transmitted to a computer after diagnosis by an AlSJ71C24.
when access is made by the computer to the AlSJ71C24.
(2) Error codes 10H to 21H are transmitted from an AlSJ71C24 to a computer after diagnosis
by
a
PC CPU when access is made by an AlSJ71C24 to the PC CPU.
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