Parker 591C - Page 293

D-44 Programming 590 Series DC Digital Drive
DIAMETER CALC.
Parameter Tag Range
TOT. TENS. DEMAND 441
⎯.xx %
This is the final output of this block (total tension demand) which can be connected to the appropriate points in the block diagram.
INERTIA COMP O/P 485
⎯.xx %
Monitors the sum of all inertia compensations.
OUTPUT 706
⎯.xx %
The sum of the diameter-scaled TENSION DEMAND after the TENSION SCALER scaling and the compensation losses. For open loop winder
applications, connect this output to the TORQUE DEMAND (Tag 432) in the TORQUE CALC. function block. (This output is located in the
SYSTEM::CONFIGURE I/O::BLOCK DIAGRAM menu).
Functional Description
|X|
|Y|
REEL SPEED [437]
X<Z
MIN SPEED [426]
RESET VALUE EXTERNAL RESET
MIN DIAMETER [425]
DIAMETER [427]
RAMP RATE [453]
LINE SPEED [424]
[462] [463]
[430]
[428]
[429]
aX/Y
x
z
Hold
DIAMETER CALC.
Core Diameter (d)
Line Speed (S)
Reel Diameter
ω
r
(D)
Circumference = πD or Line Speed (S) = Reel Speed (
ω
r) x D
Thus D = S
ωr
i.e. D ∝ Line Speed (S)
Reel Speed (ωr )
Therefore with the web intact we can calculate the diameter from the two s
p
eeds.