5.3 Description of Function Codes 5.3.9 d codes (Applied functions 2)
[ 2 ] Line speed control
Machinery configuration of winder system and function code settings
Shown below is a machinery configuration of a winder system for which it is necessary to configure the function
codes as listed below.
Inverter
Encoder
I/F card
U, V, W
R, S, T
Reduction ratio a:b
(When the motor shaft
rotates “b” times, the take-
up roll shaft rotates “a”
times.)
Speed v
in winding direction
Drum
Winder
(The radius of the take-up roll increases
as the roll rotates.)
Speed ｖ
A/B phase or B phase
Motor
Encoder
b
a
c
d
Reduction ratio c：d
(When the speed detector shaft
rotates “d” times, the encoder
shaft rotates “c” times.)
Radius of take-up roll (r1)
Speed detector
radius r2
• Speed reduction ratio between motor shaft and take-up roll shaft a : b
• Speed reduction ratio between speed detector shaft and encoder shaft c : d
• Radius of take-up roll before winding r
1
[m]
• Radius of speed detector r
2
[m]
Table 5.3-27 Setting the reduction ratio
Encoder pulse resolution (P/R)
Speed reduction ratio of the whole machinery (load)
K
2
K
1
=
r
2
r
1
×
b
a
×
d
c
=
d17
d16
d16: Denominator factor for the speed reduction ratio
(K1 = r1 a c)
d17: Numerator factor for the speed reduction ratio
(K2 = r2 b d)
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