Pulse Input Command (Speed Command Selection); Pulse Command Connection Method - Toshiba TOSVERT VF-AS1 Instruction Manual

4.2.Pulse input command (speed command selection)

It is possible to input inverter operation frequency command by pulse signals.
This command cannot be used when vector control operation with sensor is effective.
- Inverter output frequency can be controlled in ratio with the pulse output signal from the
pulse oscillator.
- By inputting two-phase pulse with 90 degrees phase difference, it is possible to input for-
ward and reverse rotation commands.

4.2.1.Pulse command connection method

Two-phase pulse input command
1. Connect pulse input signal to the point between terminals A and NA on phase A and for
between terminals B and NB on phase B
2. The polarity of the pulse input signals should be as follows:
3. Forward and reverse operation can be judged by the pulse from the phase A and B by
using a judgement circuit together with the operational frequency command.
4. The judgement on forward and reverse rotation is made as shown in Figure 4-5.
Phase A(V
Forward rotation
Phase B(V
NA
NB
Figure 4-5 Judgement on forward and reverse rotation by the two-phase (Phase A and
<Caution when using open collector method>
When using open collector method in 4.1.1, the maximum frequency should be derated
by referring to the caution item.
+ side: A and B
- side: NA and NB
)
A
)
B
A
A
V
A
A
B
B
V
B
Ｂ
Phase B) pulse rows
Phase A(V )
A
Reverse rotation
Phase B(V )
B
PG
Phase difference :
19
E6581319
X X X X
1 2 3 4
T
Xn >= 0.15T(n = 1,2,3,4)
