Mitsubishi MELSEC-A Series User Manual page 10

No. Name
1) LED
A1SJ71LP21GE
RUN CRC
PW
MNG PC OVER
S.MNG REM. AB. IF
DUAL SW.E. TIME
D.LINK M/S.E. DATA
T.PAS. UNDER
PRM E.
F.E. R.E. SD
CPU R/W RD
Name Status
RUN ON
OFF
MNG
E
R
R
O
R
S.MNG
DUAL
D.LINK
T.PAS.
F.E.
PW
PC
REM.
SW.E.
M/S.E.
PRM.E.
ON
R.E.
CPU R/W
CRC
OVER
AB.IF
TIME
DATA
UNDER
SD Dimly
ON
RD
Contents
Normal state
WDT error, SP.UNIT ERROR
Operating as control station or remote master
station
(OFF: Normal station)
Operating as sub-control station
Multiplex transfer in execution
(OFF: Multiplex transfer not executed)
Data link being performed
(OFF: Data link stopped)
Participating in token passing
(Transient transmission is available.)
Forward loop (F.LOOP) is faulty.
<Cause> Power-off of adjacent station, cable
disconnection, no connection, etc.
Power being supplied
(OFF: No power being supplied)
Set as PLC to PLC network
(SW1 turned OFF)
Set as remote I/O network (SW1 turned ON)
Incorrect setting of switches 2) to 5) and 7)
Station number or control/remote master
station status is duplicated on the same
network.
Duplication of network refreshes
parameters when multiple modules are
mounted.
Inconsistency between the common and
station specific parameters
Difference between parameter received
from sub-control station and the one of the
host (received from control station).
Reverse loop (R.LOOP) is faulty.
<Cause> Power-off of adjacent station, cable
disconnection, no connection, etc.
Communicating with CPU
Error detected in code check of receive data
<Cause> Timing at which station sending data to target
station is disconnected from network, hardware failure, cable
fault, noise, etc.
Error occurred when receive data processing is delayed
<Cause> Hardware failure, cable fault, noise, etc.
Consecutive 1s exceeding the specified number were
received.
Length of received data is too short.
<Cause> Timing at which station sending data to target
station is disconnected from network, too short monitoring
time, cable fault, noise, etc.
Data link WDT times out.
<Cause> Monitoring time too short, cable fault, noise, etc.
Abnormal data larger than 2 kbytes are received.
<Cause> Cable fault, noise, etc.
Internal send data processing is not done at fixed intervals.
<Cause> Hardware failure
Data being sent
Data being received
Contents
The position of
switch for the
display switch
over of 6) is
valid when it is
on the left
side.
The position of
switch for the
display switch
over of 6) is
valid when it is
on the right
side.