Fuji Electric ALPHA7, User Manual

Page: 201 / 662

CHAPTER 4 PARAMETER
4-10
Basic Parameters
4
PA1_03 Command pulse frequency, form setting
No. Name Setting range Default
value
Change
03
Command pulse
frequency, form
setting
00 to 22
01 Power
This parameter is enabled only under position control. Set this parameter for each input pulse
frequency and signal form.
This parameter should be selected for each digit.
Digit 2 1
Signal form
0: Command pulse/sign
1: Forward/reverse pulse
2: A/B phase pulse
Input frequency
0: 1 MHz or less
1: 200 kHz or less
2: 4 MHz or less
The maximum input frequency is 4.0 MHz at differential input or 200 kHz at open collector input.
However, enter each signal so that the following conditions are satisfied (the same signal conditions
apply to CA, *CA, CB and *CB). In case of A/B phase pulse, the rising or falling edge of the A-phase
signal or B-phase signal is counted as a single pulse, so that a single-pulse input is equivalent to four
pulse counts.

Command pulse / sign (reference value of parameter 03:
□
0)
The command pulse indicates the rotation amount (CA, *CA), while the command sign (CB, *CB)
indicates the direction of rotation.
If (CB) is at the low level and (*CB) is at the high level, a forward direction command is issued.
• Differential input
CA
*CA
CB
*CB
Arrow marks "↑↓" in the figure above indicate the pulse count timing.
t1
≦
0.025 [μs]
t2
≦
0.025 [μs]
t3
≧
0.125 [μs]
t4
≧
0.125 [μs]
t5
≦
0.025 [μs]
t6
≧
0.5 [μs]
t7
≧
0.5 [μs]
T
≧
0.25 [μs]
Forward rotation command Reverse rotation command
t1 t2
T
t3 t4
t5
t6 t7