4.
A2CCPU
/MELSEC-A
(2)
MINI-S3 link line error
MINI-S3 link error indicates a communication error caused by
breakage
of
the cable connecting a remote module
to
the
A2C
or by turning
off
the power to
a
remote module.
If
a MINI-S3 link line error occurs, the
M9061
(communication
error flag)
is
set and the error cause number is stored in the
D9061
(communication error cause storing register).
1
2
3
4
5
1
Initial setting error
Disconnected line
Faulty remote module
(Set
mode:
transmission stop at
an Occurrence of
online error)
Transmission
underrun error
Receive overrun error
The initial setting data
is
outside the
allowable setting range. In this
case,
communication is controlled by the
default settings.
Correct the initial settings.
Follow any of the operations indi-
cated below to execute communica-
tions according to
the
corrected ini-
tial setting data.
Turn OFF the power to the A2C
Reset the A2C.
Change the operation mode from
STOP
to
RUN.
and turn
it
back ON.
Broken cable Change the cable connected to the
data receive terminal of the remote
module for which the RUN LED
is
not
lit.
Loose cable connection
~~
Check the cable connection
at
the
data receive terminal of the
remote
module for which the RUN LED is
not lit.
Check
the
cable connection at the
data send terminal of the remote
station preceding the station for
which RUN LED is not lit.
turned
OFF
remote module for which the power
due to
a
fault. station; remove the cause of fault.
The set number of stations is greater Change the total number of stations
than the number of stations actually
connected to the A2C.
set
as
the initial setting.
During data transmission, data
being transmitted
is
discontinued
Execute communication again using
.
Turn OFF the power to the A2C
halfway.
any
of
the following operations:
data
is
completed, the next data
is
.
Change the mode
from
received.
tf
the same error reoccurs, replace
Before
the
processing of received
.
Reset
the
A2c,
STOP to RUN.
and turn it back ON.
the A2C.
4-42
m
PUI
eeza
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