Mitsubishi Electric GT16 User Manual page 776


RS-422 cable
POINT POINT POINT
Differences in polarity between GOT and OMRON
PLCs
The polarity of poles A and B in signal names is
reversed between GOT and OMRON PLCs.
 Connect a cable according to the following
connection diagrams.
(1) Connection diagram
RS422 connection diagram 1)
Connector conversion
box side
SDA
1
SDB
6
RDA
2
RDB
7
RSA
3
CSA
4
SG
5
RSB
8
CSB
9
FG
-
RS422 connection diagram 2)
Connector conversion
box
side
FG
-
SDA
1
SDB
6
RDA
2
RDB
7
SG
5
RSA
3
CSA
4
RSB
8
CSB
9
33 - 10
33. CONNECTION TO OMRON PLC
33.2 Serial Connection
OMRON PLC side
RDB
8
RDA
6
SDB
2
SDA
1
RS
4
CS
5
OMRON PLC side
FG
-
RDB
1
RDA
6
SDB
5
SDA
9
SG
3
RS422 connection diagram 3)
Connector conversion
box
side
SDA
1
SDB
6
RDA
2
RDB
7
RSA
3
CSA
4
SG
5
RSB
8
CSB
9
FG
-
RS422 connection diagram 4)
Connector conversion
box
side
SDA
1
SDB
6
RDB
7
RDA
2
RSA
3
CSA
4
SG
5
RSB
8
CSB
9
FG
-
(2) Precautions when preparing a cable
(a) Cable length
The maximum distance (between GOT and
controllers) of RS-422 cable must be 13m or less.
(b) Connector conversion box side connector
For the Connector conversion box side connector,
refer to the following.
6.7 Connector Conversion Box
(c) OMRON PLC side connector
Use the connector compatible with the OMRON
PLC.
For details, refer to the OMRON PLC user's
manual.
(3) Connecting terminating resistors
(a) GOT side
Set the terminating resistor setting switch of the
GOT main unit to "Disable".
For details of terminating resistor settings, refer to
the following.
4.2 Back Panel
(b) OMRON PLC side
When connecting an OMRON PLC to a GOT, a
terminating resistor must be set to the OMRON
PLC.
OMRON PLC user's Manual
OMRON PLC side
RDB
8
RDA
6
SDB
2
SDA
1
RS
4
CS
5
OMRON PLC side
RDB+
RDA-
SDA-
SDB+
FG