5-138
Chap. 5 FUNCTION CODES
F codes
E codes
C codes
P codes
H codes
A codes
b codes
r codes
J codes
d codes
U codes
y codes
Peripheral speed (line speed) command
Under constant peripheral speed control, speed commands should be given as peripheral speed (line speed) ones.
Setting with digital inputs
To digitally specify a peripheral speed (line speed) in m/min, make the following settings.
Function code Name Settings
E48
LED monitor 5: Line speed in m/min
E50
Coefficient for speed indication
bp
ra240π
K
1
s
×
××
=
Ks: Coefficient for speed indication (E50)
p: Number of motor poles
a, b: Components of speed reduction ratio between motor shaft and
take-up roll shaft (When the motor shaft rotates "b" times, the
take-up roll shaft rotates "a" times.)
r
1
: Radius of take-up roll before winding (initial value) (m)
Setting with analog inputs
To specify a peripheral speed (line speed) using analog inputs, set an analog input (0 to 100%) based on the following
equation.
p × b × 100
Analog input (%) =
240π × r
1
× a × fmax
× V
Where
V: Peripheral speed (Line speed) (m/min)
f
max: Maximum frequency 1 (F03)
Adjustment
Like usual speed controls, it is necessary to adjust the speed command filter, speed detection filter, P gain, and integral
time in the speed control sequence that controls the peripheral speed at a constant level.
Function code Name Key points
d01
Speed control
(Speed command filter)
If an excessive overshoot occurs for a speed command change,
increase the filter constant.
d02
Speed control
(Speed detection filter)
If ripples are superimposed on the speed detection signal so that the
speed control gain cannot be increased, increase the filter constant to
obtain a larger gain.
d03
Speed control P
(Gain)
If hunting is caused in the motor speed control, decrease the gain.
If the motor response is slow, increase the gain.
d04
Speed control I
(Integral time)
If the motor response is slow, decrease the integral time.
Cancel constant peripheral speed control Hz/LSC (Function code E01 to E07, data = 70)
Turning ON Hz/LSC cancels the constant peripheral speed control. This disables the frequency compensation of PI
operation, resulting in no compensation for a take-up roll getting bigger and an increase in the winding speed.
Use this signal to temporarily interrupt the control for repairing a thread break, for example.
Hz/LSC Function
OFF Enable constant peripheral speed control (depending on d41 setting)
ON
Cancel constant peripheral speed control (V/f control, without compensation for a take-up roll
getting bigger)
To Next Page
Loading...
