ABB ACS800 Series Firmware Manual page 81

No. Name/Value
MASTER DRV
MSTR PSEUDO
PARAM 11.12
11.04 EXT1 REF MINIMUM
0...18000 rpm
11.05 EXT1 REF MAXIMUM
Description
Follows the speed reference of the master drive.
Follows 03.16 PSEUDO SPD OUT of the master drive.
Source selected by 11.12 EXT 1 REF PTR.
Defines the minimum value for external reference 1 (absolute value).
Corresponds to the minimum setting of the used source signal.
EXT REF1 Range
2'
N
motor
N
shaft
1'
1
Example: Analog input AI1 is selected as the reference source (value
of 11.03 EXT1 REF SELECT is AI1). The reference minimum and
maximum correspond the AI minimum and maximum settings as
above.
Setting range in rpm.
EXT1 REF MAXIMUM may be calculated from the formula shown
below. However, it is strongly advised to reconfirm the calculated
value during the startup.
A procedure to experimentally reconfirm parameter 11.05 is described
in steps 1...7.
Parameter 11.05 defines the maximum rotational speed in rpm for the
winder at minimum core diameter. This parameter is used as an
intermediate scaling factor to scale the Web Speed or Material speed
to a rotational speed reference for the drive.
11.05 (rpm) =
Where: L = Maximum Line Speed in ft/min or m/min
max
D = Minimum Core diameter in ft or m
core
π = 3.1415
Z = Gear Ratio
Gear Ratio (Z) = N
Rotational Speed of Winder:
Calculation of rotational speed reference from web speed (material
speed) in the control program:
L x Z
act
=
π
D x
act
Analog Input x L
max
=
100
Analog Input x 11.05 x
=
Z
100 x
Analog Input x 11.05
=
100
1 13.01 MINIMUM AI1
2 10 VDC or 20 mA
1' 11.04 EXT1 REF MINIMUM
2' 11.05 EXT1 REF MAXIMUM
2
AI1 Range
L x Z
max
π
D x
core
/ N
motor shaft
Z
x
π
D x
act
π x D
core
x
D
D
core
x
D
act
Actual signals and parameters
FbEq
8
9
10
1 = 1 rpm
Z
π
x
act
69