Configuration
Function blocks
Diameter calculator (DCALC)
8
8.2
8.2.1

8.2−3
EDSVF9383V EN 7.1−04/2012
By division of the speed signals at DCALC1−N−LINE and DCALC1−N−WIND, the
current diameter is calculated.
ƒ The signal at DCALC1−N−LINE has to correspond to the circumferential
speed of the reel.
ƒ The signal at DCALC1−N−WIND has to be proportional to the reel speed.
ƒ You have to adapt the signal at DCALC1−N−LINE in C1300 and C1301, so
that the value calculated corresponds to the actual diameter. The
nominal reel diameter d
max
is entered in C1304.
– For operation with the nominal reel diameter d
max
you have to enter
the value at input DCALC1−N−WIND in C1300 and the value at input
DCALC1−N−LINE in C1301.
Æ’ The input signals are integrated cyclically. In C1302 you alter the
integration interval (calculation cycle):
Great value in C1302 Þ high resolution
Low value in C1302 Þ low resolution
ƒ If the integrator overflows, DCALC1−OVFL is set to HIGH. The integrator
is reset internally and starts again with the calculation of the last
correct value.
ƒ A first−order low pass filters the values calculated. The filter time
constant is set via C1303.
In C1328 the current diameter is displayed.
Æ’ For the conversion of the scaled calculated value to the absolute value
[mm], the reference diameter d
max
has to be entered via C1304.
ƒ At DCALC1−D−OUT the current diameter is output. The signal is scaled
to the value in C1304.
With DCALC1−HOLD = HIGH the last diameter value calculated is
maintained and the integrators are reset.
Æ’ When the controller is switched off, the current diameter value is
saved. When it is switched on, the last value saved is loaded.
In C1305 the minimum diameter (d
min
) in [mm] is entered. d
min
is reached
when DCALC1−DMIN switches to HIGH.
In C1306 the maximum diameter (d
max
) in [mm] is entered. d
max
is reached
when DCALC1−DMAX switches to HIGH.
In C1307 a hysteresis for resetting the display signal is set. The entry in [%]
relates to the absolute values in C1305 and C1306.
Calculating the diameter
Displaying the diameter
Maintaining/saving the
current value
Setting/displaying the
diameter
To Next Page
Loading...
Need help?
General
