Mitsubishi Electric FR-D720S SC EC Instruction Manual page 347

Parameter
Two-wire type connection
If the computer is 2-wire type, a connection from the inverter can be changed to 2-wire type by
passing wires across reception terminals and transmission terminals of the PU connector pin.
Transmission
enable
Reception
enable
NOTES A program should be created so that transmission is disabled (receiving state) when the
computer is not sending and reception is disabled (sending state) during sending to prevent
the computer from receiving its own data.
The passed wiring length should be as short as possible.
FR-D700 SC EC
PC
Pass a
wire
Communication operation and settings
Fig. 6-103:
Inverter
Two-wire type connection
I001833E
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