Hitachi L200 Manual Do Utilizador

Connecting the Inverter to ModBus

Appendix B

4. Terminate Network Wiring - The RS-485 wiring must be terminated at each 

physical end to suppress electrical reflections and help decrease transmission errors. 
The L200 communications port does not include a termination resistor. Therefore, 
you will need to add termination to the inverter if it is at the end of the network 
wiring. Select termination resistors that match the characteristic impedance of the 
network cable. The diagram below shows a network with the needed termination 
resistor at each end.

5. Set Inverter OPE/485 Switch - The inverter serial port accepts a connection to either 

the inverter keypad or the network. After removing the keypad, you will need to set a 
DIP switch on the inverter to configure the port for ModBus communications. Setting 
the switch will require removing the front housing cover. Remember to power OFF 
the inverter before removing the cover or changing the DIP switch setting. Refer to 

Locate the OPE/485 DIP switch as shown in the figure below. Carefully move the 
switch to the upper position labeled “485” (slide in direction of arrow). Then replace 
the front housing cover.

At this point the electrical network connection is complete. The next step will show 
how to configure parameters and settings related to ModBus communications.

1

2

RESET

FUNC.

STR

POWER

ALARM

RUN

A

Hz

PRG

5 0.0

1

2

RESET

FUNC.

STR

POWER

ALARM

RUN

A

Hz

PRG

5 0.0

1

2

RESET

FUNC.

STR

POWER

ALARM

RUN

A

Hz

PRG

5 0.0

ModBus 
Network

Host device

SP

SN