Toshiba VF-A7 instruction manual Switching logic, Input Common P24 Output Common CC, Common Input

■Sink logic (minus common)/source logic (plus common)

... Switching I/O terminal

The input terminals of most control circuits are designed so that they turn on when a current flows out. This type of logic is referred to as the "sink logic" (default setting). In Europe, however, the "source logic" is widely adopted, in which the input terminals of control circuits turn on when a current passes into them.

Sink	logic		Source	logic
		24VDC			24VDC	input
		input	common		P24
output		F
			output		Ｆ
common CC
24VDC		output			24VDC	output
input		OUT1
common			input		OUT1
		CC	common
					CC
Programmable		Inverter
controller			Programmable		Inverter
■Switching logic			controller

Before proceeding to wiring, switch logic without supplying power to the inverter. Switching between the sink logic and the source logic at start-up or when the inverter is energized causes the inverter to trip. In such a case, before resetting the inverter, make sure that the logic have been switched correctly.

※After switching logic, be sure to attach the switch cover to prevent the logic from being switched by mistake.

①Detach the cover

(Push the mark and make the cover slide to the right.)

②Detach the switch cover

③Switch between the sink					④Attach the
logic and		the source logic.			switch cover
	SINK		SOURCE
sink				source

☆If the error message  (sink/source switching error) is displayed, check to be sure that the sequence is normal, then reset the inverter.

B-10