Value Y1 Of Dac Scaling; Value X2 Of Dac Scaling; Value Y2 Of Dac Scaling - Siemens MICROMASTER 440 Parameter Manual

Issue 01/06
Note:
The DAC-linear characteristic is described by 4 coordinates, based on a two-point equation:
y - P0778 P
=
x - P0777 P
For calculations the point-gradient form (offset and gradient) is more advantageous:
= ⋅ +
y m x y
0
The transformation between these two forms is given by:
−
P 0780 P
=
m
−
P 0779 P
For scaling of the input the value of y_max and x_min has to be determined. This is done by the following
equations:
P 0780
=
x
m in
= −
y x (
max max
P0778[2]

Value y1 of DAC scaling

CStat: CUT
P-Group: TERMINAL
Defines y1 of output characteristic.
Index:
P0778[0] : Analog output 1 (DAC 1)
P0778[1] : Analog output 2 (DAC 2)
P0779[2]

Value x2 of DAC scaling

CStat: CUT
P-Group: TERMINAL
Defines x2 of output characteristic in [%].
Index:
P0779[0] : Analog output 1 (DAC 1)
P0779[1] : Analog output 2 (DAC 2)
Dependency:
Affects P2000 to P2003 (referency frequency, voltage, current or torque) depending on which setpoint is to
be generated.
P0780[2]

Value y2 of DAC scaling

CStat: CUT
P-Group: TERMINAL
Defines y2 of output characteristic.
Index:
P0780[0] : Analog output 1 (DAC 1)
P0780[1] : Analog output 2 (DAC 2)
MICROMASTER 440 Parameter List
6SE6400-5BB00-0BP0
−
0780 P 0778
−
0779 P 0777
⋅
0778 P 0778 P 0779
=
y
0
0777 P 0779
⋅ − ⋅
P 0777 P 0778 P 0779
−
P 0780 P 0778
−
P 0780 P 0778
⋅
x )
min
−
P 0779 P 0777
Datatype: Float
Active: first confirm
Datatype: Float
Active: first confirm
Datatype: Float
Active: first confirm
− ⋅
P 0777 P 0780
≤
200 %
−
P 0777
y
y
max
P0780
y
2
P0778
y
1
y
0
m
x x
min
P0777 P0779
x x
1 2
Unit: -
QuickComm.: No
Unit: %
QuickComm.: No
Unit: -
QuickComm.: No
Parameter Description
x
max
Level
Min: 0
2
Def: 0
Max: 20
Level
Min: -99999.0
2
Def: 100.0
Max: 99999.0
Level
Min: 0
2
Def: 20
Max: 20
95