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APPENDIX
MELSEC-Q
Appendix 6 Example of Connection when a Converter is Used
The following shows an example of a connection where the RS-232 to RS-422/485 converters are used in order to communicate data using data communication functions with the MC, non-procedure, or bidirectional protocol.
The converters covered in the Appendix are as follows:
Manufacturer
Model name
(Recommended product)
Contact
Tel No.
Fax No.
EL Engineering Ltd.
System Sacom Co., Ltd.
EL-LINE-II
KS-1
KS-10P
KS-485
Funato-cho 7-16, Nakagawa-ku,
Nagoya, 454-0805
Shibuya Property West Bldg 12F,
Higashi 1-32-12 , Shibuya-ku,
Tokyo, 150-0011
Tel: (052) 361-2290
Fax: (052) 363-1050
Tel: (03) 3797-0211
Fax: (03) 3797-0231
A recommended product is a product that this company has verified and has found to satisfy this company’s standards.
When using this products, use it so that it conforms to the recommended product’s specifications (standards).
Q series C24 side connection interface
RS-232
RS-422/485
(1) Combination between available converters and connections
System configuration with external devices
External device interface
Available converter
Description No. of connection example
Connection example 1
1:1
1:1, 1:n, m:n
RS-422
RS-485
RS-232
EL-LINE-II
KS-1
KS-10P
KS-485
KS-485
Connection example 2
Connection example 3
Connection example 4
App. - 20 App. - 20
APPENDIX
MELSEC-Q
(2) Connection example
(Connection example 1)
(EL-LINE-II)
Q series C24 side RS232 signal RS422 signal External device side
CD
RD
SD
DTR
SG
DSR
RS
CS
RI
1
2
1
2
FG
TXD
1
SW1
OFF 1
SW2
OFF
TX
2
15
3
4
5
6
7
8
9
3
4
5
20
6
8
7
RXD
RTS
CTS
DTR
DSR
CD
SG
2
3
4
5
6
7
8
ON
OFF
ON
OFF
ON
OFF
ON
2
3
4
5
6
7
OFF
OFF
OFF
OFF
OFF
OFF
RX
RTS
CTS
SG
6
19
3
16
7
20
1 or 14
DTRA
DTRB
RTSA
RTSB
CTSA
CTSB
• The CD terminal check setting should be set to "No check" according to the explanation in Section 3.2.1 (1).
• DC code control or DTR/DSR control becomes possible for transmission control.
SG
FG
RDA
RDB
SDA
SDB
DSRA
DSRB
R
R
(Connection example 2)
(KS-1/KS-10P)
Q series C24 side
CD
1
2
RD
SD
3
DTR
4
SG
5
6
DSR
RS
7
CS
8
9
RI
RS232 signal
1
2
3
4
5
6
7
8
9
FG
RD
SD
CS
RS
ER
SG
CD
DR
1
2
3
4
5
6
7
8
SW1
ON
ON
OFF
OFF
ON
ON
ON
ON
1
SW2
ON
RS485 signal
FG
(+)
DATA
OUT
(-)
(+)
DATA
IN
(-)
(+)
CONT
OUT
(-)
(+)
CONT
IN
(-)
SG
1
19
14
16
21
23
7
25
15
17
External device side
FG
RDA
RDB
SDA
SDB
DSRA
DSRB
DTRA
DTRB
RTSA
RTSB
CTSA
CTSB
SG
• The CD terminal check setting should be set to "No check" according to the explanation in Section 3.2.1 (1).
• DC code control or DTR/DSR control becomes possible for transmission control.
R
R
App. - 21 App. - 21
APPENDIX
MELSEC-Q
External device side
FG
SD
RD
RS
CS
DSR
SG
CD
DTR
Q series C24 side
CD
1
RD
2
SD
3
4
DTR
5
SG
DSR
6
RS
7
8
CS
9
RI
(Connection example 3)
7
20
24
25
3
5
1
2
6
RS232 signal
FG
RD
SD
CS
ER
SG
DR
TC
CNT
5
1
2
3
4
6
7
8
SW1
ON
ON
ON
OFF
OFF
OFF
ON
ON
(KS-485)
RS485 signal
SG
1
2
TRD+
TRD-
3
FG
9
External device side
FG
SDA
SDB
RDA
RDB
SG
R
• 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)
(KS-485)
20
24
6
7
3
5
1
2
RS232 signal
FG
RD
SD
CS
ER
SG
DR
TC
25
CNT
1
2
3
4
5
6
7
8
SW1
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
RS485 signal
SG
1
TRD+
2
TRD-
3
FG
9
These switches should be ON when the KS-485 is at the terminal of the line.
Q series C24 side
FG
SDA
SDB
RDA
RDB
SG
R
When connecting with other stations
• Data communication can be made
in half-duplex communication.
• Transmission control cannot be used.
App. - 22 App. - 22
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