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122
Programless Communications
Section 5-1
• RS-232C
• RS-422
• Refer to the user’s manual if using a Communications Module for the
QnA/QnAS Series.
B1
B2
B3
B4
B5
B6
B7
B8
B9
A1
A2
A3
A4
A5
A6
A7
A8
A9
EJ1N-HFU
@
-NFLK
MELSEC-Q/QnA/QnAS-series PLC
RS-232C
Turn ON pin 8 of SW2
to set RS-232C.
SD
RD
SG
RS-232C
CD
Signal
1 (
−
)
Pin
No.
RD
SD
SG
RS
CS
2 (3)
3 (2)
5 (7)
7 (4)
8 (5)
DTR
4 (20)
DSR
6 (6)
Shield
Note
QnA pin numbers are given
in parentheses.
RS-422
RDB(+)
RDA(
−
)
EJ1N-HFU
@
-NFL2
SDA
−
SDB+
RDA
−
RDB+
Signal
FG
MELSEC-Q/QnA/QnAS-series PLC
RS-422
Shield
SDB(+)
SDA(
−
)
B1
B2
B3
B4
B5
B6
B7
B8
B9
A1
A2
A3
A4
A5
A6
A7
A8
A9
SDA
SDB
RDA
RDB
Signal
FG
R
R
Summary of Contents for EJ1 EtherCAT
Page 2: ...EJ1 Modular Temperature Controllers User s Manual Revised July 2008 ...
Page 3: ...iv ...
Page 19: ...xx ...
Page 213: ...188 Detailed Description of Services Section 6 4 ...
Page 227: ...202 Detailed Description of Services Section 7 5 ...
Page 303: ...278 Index ...
Page 305: ......