Mitsubishi Electric MELSEC-A Series User Manual page 80

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.
•
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