Hitachi X200 Series instruction manual Sp Sn

Models: X200 Series

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B4

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 X200 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.

ModBus

Network

SP SN

Host device

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 S7 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 S7 setting. Refer to “Front Housing Cover” on page 2–3for detailed instructions. 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.

485

OPE

SW7

SW8

ON

OFF

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

Page 231
Image 231
Hitachi X200 Series instruction manual Sp Sn