Dia Calc Control - ABB ACS800 Series Firmware Manual

118
No. Name/Value

65 DIA CALC CONTROL

Actual signals and parameters
Description
There are three methods used to calculate the actual diameter of the
roll; selected by 65.14 CALC DIA USING. Method 1 uses an AI from
an ultrasonic sensor. Method 2 is the internal calculator used when the
Tension or Dancer macro is selected. Method 3 is the internal
calculator used when the Lead macro is selected.
All Methods
In order for the diameter calculator to be active:
- the program is allowed to count
- 65.08 COUNT UP ENABLE is set to YES and/or
- 65.09 COUNT DOWN ENABLE is set to YES
- the line speed must be above
- the web tension regulator is enabled
- 63.09 TENSION CTL ENABLE or
- 62.09 DANCER CTL ENABLE or
- the winder is using the Lead macro
The diameter's rate of change (per 10ms program scan) is limited to:
65.07 WEB THICKNESS x 2 x
60 sec/min * 100 ms/sec
Method 1
There are two parameters used to scale the analog input to give a
diameter value: 65.02 MAX ROLL DIAMETER and
MIN DIA. The maximum input (10 VDC / 20 mA) is set to
ROLL DIAMETER and the minimum input (0 VDC / 2 mA / 4 mA) is set
to 65.15 SENSOR MIN DIA. It is assumed the measuring device is
linear.
Method 2
When a tension regulator is used, the internal calculator uses the
01.02 MOTOR SPEED, 65.01
SPEED REF. For this calculator, it is assumed that the motor is turning
at the rate necessary for its diameter to achieve the desired line
speed; otherwise the web would be broken. With this in mind and
remembering that the ACTUAL SPEED REF is relative to the
MIN CORE DIAMETER and already accounts for the gear ratio and
PI; the following is basically the equation needed to calculate the
diameter:
ACTUAL SPEED REF *
=
Dact
01.02
Method 3
When the Lead macro is used, there is no PI regulator to compensate
for a changing diameter; therefore,
03.17 PSEUDO SPD IN is derived from
67.02 WEB SPD SCALE. This value is relative to
DIAMETER
03.17 PSEUDO SPD IN *
Dact =
65.06 MIN DIA CALC SPD
01.02 MOTOR SPEED
65.15
MIN CORE DIAMETER, and ACTUAL
65.01 MIN CORE DIAMETER
MOTOR SPEED
03.17 PSEUDO SPD IN is used.
67.01 WEB SPD INPUT and
65.01
65.01 MIN CORE DIAMETER
01.02 MOTOR SPEED
FbEq
SENSOR
65.02 MAX
65.01
MIN CORE