E-33
FX Series PLC User's Manual - Data Communication Edition
Inverter Communication
4 Wiring
4.6 Wiring a Shielding Wire (Class-D grounding)
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• FX
3G
-485-BD-RJ
4. Connecting a terminal resistor to the inverter
Communication may be affected by noise echo depending on the transmission speed and transmission
distance. When communication is hindered by noise echo, connect a terminal resistor to the inverter.
1) When the PU connector or RS-485 connector (S500 Series) is used
- Connect a terminal resistor between pin No. 3 (RDA) and pin No. 6 (RDB).
- Connect a distributor to the PU terminal because terminal resistors cannot be connected.
- Connect a terminal resistor only to the inverter located furthest away from the FX PLC.
2) When the FR-A5NR is used in connection
- Connect a terminal resistor chip (which is supplied together with the FR-A5NR) between the RDB and
RDR terminals in the most distant inverter.
3) When the FR-E7TR is used in connection
A terminal resistor is built into the FR-E7TR. Set the terminal resistor switch in the E700 Series inverter
located at the end to "100
".
4) When the inverter built-in RS-485 terminal is used
A terminal resistor is built into the RS-485 terminal. Set the terminal resistor switch in the F700/A700
Series inverter located at the end to "100
".
4.6
Wiring a Shielding Wire (Class-D grounding)
Perform Class-D grounding only to one side of a cable according to the absence/presence of the grounding
terminal.
For details on connection, refer to each wiring diagram.
1. When the
terminal is provided in the communication equipment
Connect the
terminal to the
(grounding) terminal of the PLC requiring Class-D grounding.
2. When the
terminal is not provided in the communication equipment
Perform Class-D grounding directly to the shielding wire of the cable.
Terminal resistor
selector switch
Terminal
resistor
switch
Terminal
resistor
switch
OPEN
100
FG
FG
FG
Summary of Contents for FX-485ADP
Page 2: ......
Page 120: ...B 2 FX Series PLC User s Manual Data Communication Edition N N Network ...
Page 188: ...C 2 FX Series PLC User s Manual Data Communication Edition Parallel Link ...
Page 244: ...D 2 FX Series PLC User s Manual Data Communication Edition Computer Link ...
Page 344: ...E 2 FX Series PLC User s Manual Data Communication Edition Inverter Communication ...
Page 700: ...H 2 FX Series PLC User s Manual Data Communication Edition Programming Communication ...
Page 752: ...I 2 FX Series PLC User s Manual Data Communication Edition Remote Maintenance ...
Page 817: ......