Mitsubishi Electric FR-A700 Series, Technical Manual

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432
PARAMETER
2.20.10 PLG pulse division output [Pr.413]
(A700)
Pulse input of encoder connected to the inverter is divided and output from the FR-A7AL terminal.
(1) Wiring Example
For open collector output, the signal may become
unstable if the input resistance of the connected
device is large and the device may detect the signal
incorrectly. In this case, adding a pull up resistance
as shown below will improve the phenomenon.
Select a pull-up resistance in consideration of the
input current of the connected device so that the
open collector output current will not exceed the
output permissible load current.
(2) Division waveform by division ratio
Both ON-OFF width is division times. (50% duty)
• Pulse waveform example at 1000 pulse input
when [ Pr. 413 = "2" ]
Control of forward rotation/reverse rotation by phase
difference between A phase and B phase.
• When A phase is 90
°
advanced as compared to
B phase: forward rotation
• When A phase is 90
°
behind as compared to B
phase: reverse rotation
A700
[Pr.] Name
Initial
Value Setting
Range
Description
413
Encoder pulse division
ratio
1 1 to 32767
The encoder pulse signal at the motor end can be divided in
division ratio set in [
Pr. 413 ] and output.
1
Pr. 413 setting
Division ratio
Division ratio
1
Pr. 413 setting
FPAR
FPBR
FPZR
Inverter
FR-A7AL
*
* Z phase can not be divided.
Motor end
encoder
A, B, Z phases
A phase
B phase
A phase
B phase
Z phase
*
Z phase
FPA2 (A phase)
FPA (A phase)
FPB (B phase)
FPZ (Z phase)
FPA2 (B phase)
FPA2 (Z phase)
Encoder pulse
output
(open collector)
Encoder pulse
output
(differential line
driver)
Inverter
FR-A7AL
FPA2/FPB2/FPZ2
SD
Power supply
Connected device
Pull-up resistance
- +
Division ratio
Division ratio
1/1
1/2
(1000 pulses)
(500 pulses)
2 divisions
A phase
B phase
A phase
B phase