Selecting The Number Of Pg (Encoder) Pulses; Pg-A2/Pg-B2; Pg-D2/Pg-X2; Pg-B2 Connection Example - YASKAWA VARISPEED-616G5 Instruction Manual

3.7.5 Selecting the Number of PG (Encoder) Pulses

PG-A2/PG-B2

J
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 (
Some examples of PG output frequency (number of pulses) for the maximum frequency output are shown
in Table 3.17.
Table 3.17
Motor's Maximum Speed (r/min)
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.)
Fig 3.33

PG-D2/PG-X2

J
There are 5 V and 12 V PG power supplies.
Check the PG power supply specifications before connecting.
The maximum response frequency is 300 kHz.
Use the following equation to computer the output frequency of the PG (fPG).
Motor speed at maximum frequency output (
f Hz
( ) =
PG
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
Fig 3.34
r∕min
60
PG Pulse Selection Examples
PG Rating
1800
1500
1200
900
PG power supply
Capacitor for power mo-
mentary power loss
Signals

PG-B2 Connection Example

60
PG power
0 V 12V
Capacitor for momen-
tary power loss
PG-X2 Connection Example (for 12 V PG power supply)
3 - 33
3.7 Installing and Wiring PG Speed Control Cards
)
PG p∕rev = 20, 000 Hz
rating ( )
×
PG Output Frequency for Maximum
(p/rev) Frequency Output (Hz)
600
800
1000
1200
r∕min
)
PG p∕rev
rating (
×
.)
18,000
20,000
20,000
18,000
3
)