Mitsubishi Electric FR-A700 Technical Manual page 398

2.20.10 PLG pulse division output [Pr.413]
Pulse input of encoder connected to the inverter is divided and output from the FR-A7AL terminal.
[Pr.] Name
Encoder pulse division
413
ratio
(1) Wiring Example
Motor end
encoder
A, B, Z phases
Inverter
FR-A7AL
A phase
Division ratio
B phase
1
Pr. 413 setting
Z phase
A phase
Division ratio
B phase
1
Pr. 413 setting
Z phase
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.
Pull-up resistance
Inverter
FR-A7AL
FPA2/FPB2/FPZ2
SD
Initial
Value
1
FPA2 (A phase)
Encoder pulse
FPA2 (B phase)
output
FPA2 (Z phase)
(open collector)
*
FPA (A phase)
FPAR
Encoder pulse
FPB (B phase)
output
FPBR
FPZ (Z phase)
(differential line
*
FPZR
driver)
* Z phase can not be divided.
Power supply
- +
Connected device
A700
(A700)
Setting
Range
The encoder pulse signal at the motor end can be divided in
1 to 32767
division ratio set in [ Pr. 413 ] and output.
(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" ]
A phase
Division ratio
1/1
B phase
A phase
Division ratio
1/2
B phase
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
432
PARAMETER
Description
(1000 pulses)
2 divisions
(500 pulses)