B
−
3
Connecting the Inverter to ModBus
Modbus connector is in control terminal block as below. Note that RJ45 connector
(RS-422) is used for external operator only.
Terminate Network Wiring - The RS-485 wiring must be terminated at each physical
end to suppress electrical reflections and help decrease transmission errors. WJ200 has
a built-in 200
Ω
resistor activated by a dip switch.
Select termination resistors that match
the characteristic impedance of the network cable. The diagram above shows a network
with the needed termination resistor at each end.
PLC P24
1
L
3
2
5
4
6
SN
7
12
11
AM CM2
OI
L
H
O
EA
SP
EO
RS-485
(Modbus)
SP SN
SP SN
SP SN
SP SN
External device
(Master)
+
-
WJ200 (No.2)
WJ200 (No.3) WJ200
(No.n)
WJ200 (No.1)
200
Ω
RS-422
(Operator)
USB
Dip switch for termination resistor
Summary of Contents for WJ200 Series Software
Page 19: ...xviii Revisions Revision History Table No Revision Comments Date of Issue Operation Manual No ...
Page 295: ...4 92 Safe Stop Function To be finalized after TUV approval ...
Page 296: ...5 1 5 Inverter System Accessories In This Chapter page Introduction 2 Component Description 3 ...
Page 322: ...A 1 A Glossary and Bibliography In This Appendix page Glossary 2 Bibliography 8 ...
Page 378: ...B 49 Note 2 Be sure not to write into above 1F02h to 1F1Dh ...