YASKAWA V1000 - Network Termination

n
RS-422 Interface
R+
R–
IG
S+
S–
PLC
Drive
S2
OFF ON
R+
R–
IG
S+
S–
Drive
S2
OFF ON
R+
R–
IG
S+
S–
Drive
S2
OFF ON
R+
R–
IG
S+
S–
Figure C.4 RS-422 Interface
Note: 1. Turn on DIP switch S2 on the drive located at the end of the network. Turn it off at all other slaves.
2. Set H5-07 to 0 when using the RS-422 interface.
u
Network Termination
The two ends of the MEMOBUS/Modbus network line
have to be terminated. The drive has a built in terminating resistance
that can be enabled or disabled using DIP switch S2. If a drive is located at the end of a network line, enable the terminating
resistance by setting DIP switch S2 to the ON position. Disable the terminating resistance on all slaves that are not located
at the network line end. Figure C.5 illustrates the setting of DIP switch S2.
RS-422A
or
RS-485
switch
S2
terminal resistance (1/2 W, 120
)
(in the ON position)
OFF ON
DIP
DIP switch S2
S1 S2 S3 S4 S5 S6 S7 HC SC H1 RP
R+ R
－ S+ S － IG
P1 P2 PC A1 A2 +V AC AM AC MP
MCMBMA
R+ R- S+ S- IG
R+
S+
+
-
S -
R -
Figure C.5 Serial Communications Terminal and DIP Switch S2
C.4 Connecting to a Network
408
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual