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App. - 22 App. - 22
MELSEC-Q
APPENDIX
(Connection example 3)
CD
RD
SD
DTR
SG
DSR
RS
CS
RI
FG
RD
SD
CS
ER
SG
DR
TC
CNT
RS232 signal
SW1
1
2
3
4
5
6
7
8
ON
ON
ON
OFF
OFF
OFF
ON
ON
RS485 signal
FG
External device side
SDA
SDB
RDA
RDB
SG
(KS-485)
1
2
3
4
5
6
7
8
9
1
2
3
5
6
7
20
24
25
SG
1
TRD+
TRD-
FG
2
3
9
R
Q series C24 side
• Data communication can be made in half-duplex communication.
• The CD terminal check setting should be set to "No check" according to the explanation in Section 3.2.1 (1).
• Transmission control cannot be used.
(Connection example 4)
FG
SD
RD
RS
CS
DSR
SG
CD
DTR
External device side
FG
RD
SD
CS
ER
SG
DR
TC
CNT
RS232 signal
SW1
1
2
3
4
5
6
7
8
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
RS485 signal
FG
SDA
SDB
RDA
RDB
SG
(KS-485)
1
2
3
5
6
7
20
24
25
SG
1
TRD+
TRD-
FG
2
3
9
R
These switches should
be ON when the KS-485
is at the terminal of the
line.
When connecting
with other stations
Q series C24 side
• Data communication can be made
in half-duplex communication.
• Transmission control cannot be used.