Siemens 440 - Manual (Page 95)

Issue 01/06 Parameter Description
MICROMASTER 440 Parameter List
6SE6400-5BB00-0BP0
95
Note:
The DAC-linear characteristic is described by 4 coordinates, based on a two-point equation:
0777 P 0779 P
0778 P 0780 P
P0777 - x
P0778 - y
−
−
=
For calculations the point-gradient form (offset and gradient) is more advantageous:
0 y x m y + ⋅ =
The transformation between these two forms is given by:
0777 P 0779 P
0778 P 0780 P
m
−
−
= % 200
0777 P 0779 P
0780 P 0777 P 0779 P 0778 P
y 0
≤
−
⋅ − ⋅
=
For scaling of the input the value of y_max and x_min has to be determined. This is done by the following
equations:
0778 P 0780 P
0779 P 0778 P 0777 P 0780 P
x in m
−
⋅ − ⋅
=
0777 P 0779 P
0778 P 0780 P
) x x ( y min max max
−
−
⋅ − =
x
y
0
x
min
x
max
y
max
y
m
y
1
y
2
P0780
P0778
P0777
x
1
P0779
x
2
P0778[2] Value y1 of DAC scaling Min: 0
CStat: CUT Datatype: Float Unit: - Def: 0
P-Group: TERMINAL Active: first confirm QuickComm.: No Max: 20
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 Min: -99999.0
CStat: CUT Datatype: Float Unit: % Def: 100.0
P-Group: TERMINAL Active: first confirm QuickComm.: No Max: 99999.0
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 Min: 0
CStat: CUT Datatype: Float Unit: - Def: 20
P-Group: TERMINAL Active: first confirm QuickComm.: No Max: 20
Defines y2 of output characteristic.
Index:
P0780[0] : Analog output 1 (DAC 1)
P0780[1] : Analog output 2 (DAC 2)
Level
2
Level
2
Level
2