Mitsubishi Electric MELSEC A Series User Manual page 62

(15) LEDs for indicating operation status and errors
LED Name
RUN
SD
RD
CRC
OVER
AB. IF
TIME
DATA
UNDER
F. LOOP
R..
LOOP
1
2
4
8
(16) Station number setting switches
Station numbers from 00 to 64 can be set.
The "X10" switch is to set the ten's digit of a station number.
The "X1" switch is to set the one's digit of a station number.
To use a station as the master station, set "00".
To use a station as a local station, set between "01" and "64".
Description
Comes ON when the data link
is normal.
Remains ON while data is
sent.
Remains ON while data is
received.
Not used (always OFF)
Comes ON when a code
check error occurs.
Comes ON when a data entry
delay error occurs.
Comes ON when data is all
"1".
Comes ON when a time-out
occurs.
Comes ON when a receive
data error occurs.
Comes ON when a send data
error occurs.
Comes ON when a forward
loop receive data error occurs.
Comes ON when a reverse
loop receive data error occurs. 10
Indicate the figures at the
one's digit of the station
numbers in BCD.
LED
Name
S0
S1
Not used
S2
(These LEDs flash
during execution of
S3
data link. This is not an
S4
abnormal condition)
S5
S6
S7
Comes ON when the
forward loop serves as
the data receiving line,
F.LOOP
or goes OFF when the
reverse loop is used for
it.
Comes ON during
CPU R/W communications with
the PC CPU.
Not used (always OFF)
Not used (always OFF)
Indicate the figures at
the ten's digit of the
20
station numbers in
40
BCD codes.
Not used (always OFF)
49
Description