Selecting The Number Of Pg (Encoder) Pulses; Pg-A2/Pg-B2; Pg Pulse Selection Examples; Pg-B2 Connection Example For External +12Vdc Pg Power Supply - YASKAWA F7 User Manual

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Selecting the Number of PG (Encoder) Pulses

The setting for the number of PG pulses depends on the model of PG Speed Control Board being used. Set the correct number
for your model.

PG-A2/PG-B2

The maximum response frequency is 32,767Hz.
Use a PG that outputs a maximum frequency of approximately 20kHz for the rotational speed of the motor.
f
PG
Some examples of PG output frequency (number of pulses) for the maximum frequency output are shown in Table 2.24.
Motor's Maximum Speed (RPM)
1800
1500
1200
900
A separate power supply is required if the PG power supply capacity is greater than 200mA. (If momentary power loss must
be handled, use a backup capacitor or other method). See Fig 2.24.
PG
TA1
1
2
3
4
5
6
TA3
Tel: +(86) 755 8660 6182
Motor speed at maximum frequency output (RPM)
(Hz) =
Table 2.24 PG Pulse Selection Examples
AC
Capacitor for
momentary power loss
0Vdc
+
_
+
_
Fig 2.24 PG-B2 Connection Example For External +12Vdc PG Power Supply
Electrical Installation 2 - 41
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60
PG Rating (PPR)
600
800
1000
1200
PG power supply
0Vdc +12Vdc
_
+
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× PG rating (PPR)
PG Output Frequency (Hz)
18,000
20,000
20,000
18,000
+12Vdc
0Vdc
+
_
+
_
Signals
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PG