Panasonic VF200 Instruction Manual page 48

3. Wiring
·As for communication cable, use a shielded twisted-pair cable and separate it
from power lines or high-voltage circuits (20 cm or more).
·The total wiring length of the communication cables must not exceed 500 m.
·Connect the communication terminals "D+" to "D+" and "D-" to "D-".
·Jump out the terminal "D-" and "E" of the inverter used as terminal
station.Jumping is not allowed for any other device.