Eurotherm 590+ Series, Product Manual, Page: 179 / 308

Programming Your Application
6-69
590+ Series DC Digital Converter
TAPER CALC.
The purpose of this block is to profile the
tension demand with diameter.
Functional Description
Taper Function
Tension Spt. [439]
Tapered Demand
Diameter*
Min Diameter*
Tension Trim
Total Tension Demand
[441]
[440]
*Permanently linked
100
0
100
0
100
-100
100
-100
[452]
to Diameter Calc.
Taper [438]
Hyperbolic Taper Tension
The taper block provides hyperbolic taper tension according to the following equation: -
( )
{ }
Tapered Demand Tension Spt 100%
Taper
Diameter
Diameter Min Diameter = × − × −
The taper tension characteristics are shown below: -
Tension
Min
Diameter
100%
Diameter
-100% Taper
100% Taper
0% Taper
Torque
Min
Diameter
100%
Diameter
-100% Taper
0% Taper
100% Taper
100% taper tension is equivalent to constant torque on the centre wind spindle.
MMI Menu Map
1
SETUP PARAMETERS
2
SPECIAL BLOCKS
3
TAPER CALC.
TAPER
TENSION SPT.
TAPERED DEMAND
TENSION TRIM
TOT.TENS.DEMAND
Taper Calc.
–
TAPERED DEMAND [452]
–
0.00 %
–
TOT. TENS DEMAND [441]
–
0.00 %
0.00 %
–
[438] TAPER
–
0.00 %
–
[439] TENSION SPT.
–
0.00 %
–
[440] TENSION TRIM
–
Parameter Descriptions
TAPERED DEMAND Range: xxx.xx %
This is the output of the TAPER calculation on the TENSION SPT.
TOT. TENS DEMAND Range: xxx.xx %
(TOT.TENS.DEMAND)
This is the final output of this block (total tension demand) which can be connected to the
appropriate points in the block diagram.
TAPER Range: -100.00 to 100.00 %
This defines the amount of tapering in the tension demand with diameter variation. When
TAPER is positive, the tension demand is hyperbolically decreased as diameter increases
TENSION SPT. Range: 0.00 to 100.00 %
This is the required tension setpoint.
TENSION TRIM Range: -100.00 to 100.00 %
This is the additional tension demand in the form of a trim.