6 Application of Encoder (PG)
13
6
Application of Encoder (PG)
The maximum frequency of the encoder (PG) output pulses that can be detected is
32,767 Hz.
Therefore, select a PG that outputs about 20 kHz at the motor rotation speed at maximum
frequency output.
Note: 1.
The motor rotation speeds at maximum frequency output are
represented
as synchronous rotation speeds
.
2.
PG power supply is +12 V.
3.
If the PG power current is 200 mA or greater, provide a sep-
arate power supply. (If momentary power loss ride-through
function is necessary, provide backup capacitor or take other
necessary measures.)
Fig. 7 Connection Example with Encoder (PG) when Using Separate Power Supply
Examples of PG Selection
Motor Rotation Speed
at Maximum Frequency
Output (min
-1
)
PG Parameter
(p/rev)
PG Output Frequency at
Maximum Frequency
Output (Hz)
1800
600
18,000
1500
800
20,000
1200
1000
20,000
900
1200
18,000
×
*
PG constant (p/rev) = 20,000 Hz
Motor rotation speed (min
-1
) at max. frequency output
60
PG power supply
Backup capacitor momentary power loss recovery
Signal
