Yaskawa VS-626 MC5 - Manual (Page 63)

Wiring
3.7.5 Selecting the Number of PG (Encoder) Pulses
- 30
3.7.5 Selecting the Number of PG (Encoder) Pulses
J PG-B2
The maximum response frequency is 32,767 Hz.
Use a PG that outputs a maximum frequency of approximately 20 kHz for the rotational speed of the motor.
Motor speed at maximum frequency output ( r min )
60
 PG rating ( p rev )
20, 000 Hz
Some examples of PG output frequency (number of pulses) for the maximum frequency output are shown
in Table 3.15.
Table
3.15 PG Pulse Selection Examples
Motor’s Maximum Speed r/min PG Rating
p/rev
PG Output Frequency for Maximum
Frequency Output Hz
1800 600 18,000
1500 800 20,000
1200 1000 20,000
900 1200 18,000
Note 1.The motor speed at maximum frequency output is expressed as the sync rotation speed.
2. The PG power supply is 12 V.
3. A separate power supply is required if the PG power supply capacity is greater than
200 mA. (If momentary power loss must be handled, use a backup capacitor or other
method.)
PG power supply
Capacitor for power mo-
mentary power loss
Signals
Fig
3.29 PG-B2 Connection Example
J PG-X2
Both 12V and 15V are available as PG power supply. Verify the PG power supply specifications before
connection.
The maximum response frequency is 300 kHz.
Use the following equation to computer the output frequency of the PG (fPG).
f
PG
( Hz )
Motor speed at maximum frequency output ( r min )
60
 PG rating ( p rev )
A separate power supply is required if the PG power supply capacity is greater than 200 mA. (If momen-
tary power loss must be handled, use a backup capacitor or other method
.)
PG power
0 V 12V
Capacitor for momen-
tary power loss
Fig
3.30 PG-X2 Connection Example
3