4. A2CCPU
MELSEC·A
(2) MINi-53 link line error
MINI-53 link error indicates a communication error caused by breakage
I
of the cable connecting a remote
module
to
the
A2C or by
turning
off
the power to a remote module.
if a MiNI-53 link line error occurs, the M9061 (communication error flag)
is set
and
the error cause number is stored in the D9061 (communica-
tion error cause storing register).
Error
Cause
Error
Contents
Action
to
Take
Number
• Correct the initial settings.
• Follow
any
of
the
operations
indicated below to execute
• The
Initial
setting
data
is
communications according to the
outside the allowable
corrected
initial
setting
data.
1
Initial setting error
setting
range.
In this case, communlca-
•
Turn
OFF
the
power
to
the
A2C
and
tion
is
controlled
by the
turn
it
back
ON.
default settings.
• Reset
the
A2C.
• Change the operation mode from
STOP 10 RUN.
•
Change
the
cable
connected
to
the
• Broken
cable
data
receive
terminal
of the remote
module
for
which
the RUN LED is not
lit
•
Check
the
cable
connection
at the
data
receive
terminal
of the remote
module
for
which
the RUN LED is not
2
Disconnected
line
lit.
• Loose
cable
connection
•
Check
the
cable
connection
at the
data
send
terminal
of
the
remote
station
preceding
the
station
for
which
RUN LED is
not
lit.
•
Power
supply
to
the
remote •
Turn
ON
the
power
supply
for
the
module
turned
OFF
remote
module
for
which
the
power
is
OFF.
•
There
is a remote
module
• Read
09196
to
09199
(faulty
station
with
which
communication
is
storing
registers) to
find
a
faulty
Faulty
remote
module
stopped
due
to
a fault.
station;
remove
the
cause
of fault.
3
(Set
mode:
transmission
stop
at an
occurrence
of
•
The
set
number
of
stations
online
error) Is
greater
than
the
number
•
Change
the
total
number
of
stations
of
stations
actually
set as
the
initial
setting.
connected
to
the
A2C.
Transmission
underrun
•
During
data
transmission,
•
Execute
communication
again
using
4
error
data
being
transmitted
Is
any
of
the
following
operations:
discontinued
halfway.
•
Turn
OFF
the
power
to
the
A2C
and
turn
it
back
ON.
• Before the
processing
of
•
Reselthe
A2C.
5 Receive
overrun
error
received
data
is
com-
pleted,
the
next
data
is •
Change
the
operation
mode
from
received.
STOP 10 RUN.
~
• If
the
same
error
reoccurs,
replace
the
A2C.
•
4-44
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