39
Chapter 4
P
SD
, the number of pulses during T, [sec] is represented by the area of the
trapezoid A-B-C-F
P
SD
= {[(FL) + (FH)]* Ted}/ 2(5)
Substitute equations (1), (3) and (4) into equation (5)
P
SD
= {[(R2)^2 – (R1)^2] x (R3) x Multiplier} / [2 x 8192 x (R4)]
When output 5 pulses at FL speed after the completion of the ramping-
down, the set value of the ramping-down point register (R5) is
R5 = P
SD
+ 5
R5 = {[(R2)^2 – (R1)^2] x (R3) x Multiplier} / [16384 x (R4)] + 5
4.1.7 R6: Idling Pulse Register (3-bit)
To operate in high speed mode, the motor is accelerated quickly after
starting. Therefore, the speed calculated from the output pulse frequency
will be higher than the FL speed that is set. If FL is set to a value lower
than the self-start frequency, the motor will not start.
Therefore, in order to be able to start from near the self-start frequency,
the acceleration using the FL speed can be started from 1 to 7 pulses after
the start command. The pulses that the start is delayed by are referred to
as idling pulses.
The allowable range is 0 to 7. This is effective in high-speed operation.
Setting this register to 0 will provide a normal start.
4.1.8 R7: Environmental Data Register (1-bit)
The allowable range is 0 or 1
0CW/CCW pulse type
1Pulse/DIR type
Note
Multiplier = 1 while in Linear Accel/Decel mode
Multiplier = 2 while in S-curve Accel/Decel mode
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