Siemens Sinumerik 840D Series Function Manual page 128

4 Firmware Drive Functions
4.5 Manipulated voltage output
5487
NEG_DUAL_GAIN_COMP_S_FLOW [n]
Knee-point compensation neg. flow saturation
Unit: Default:
% 100.0
5488
NEG_DUAL_GAIN_COMP_S_VOL T [n]
Knee-point compensation neg. voltage saturation
Unit: Default:
% 100.0
4-128
0...7 index of the parameter set
Minimum: Maximum:
0.2 100.0
0...7 index of the parameter set
Minimum: Maximum:
0.2 100.0
To calculate the inverse characteristic, the beginning of a saturation range with
parabolic rounding in the positive quadrant of the valve characteristic is defined
in MD 5485 and MD 5486 and in the negative quadrant with MD 5487 and
MD 5488.
The positive and negative valve flow rates at the start of the saturation range in
relation to the nominal valve flow rate (MD 5107) are entered in MD 5485 and
MD 5487 respectively.
The positive and negative valve voltages in relation to the nominal voltage
(MD 5109) are entered in MD 5486 and MD 5488 respectively.
The saturation range is compensated by a root characteristic such that the inter-
section point lies on a continuous tangent and the characteristic ends at the
point (100%, 100%).
If the default of 100% is set in MD 5485 and MD 5486 or MD 5487 and
MD 5488, there is no saturation range in the positive or negative quadrant.
Q [%]
100
90
Fig. 4-16 Example
For a more detailed explanation, see also Subsection 2.3.1 and Appendix A.
SINUMERIK 840D/SIMODRIVE 611 digital, HLA Module (FBHLA) - 10.03 Edition
Related to:
HLA
Data type:
FLOAT
Related to:
HLA
Data type:
FLOAT
MD 5485 = 90%
MD 5486 = 70%
70 100 U [%]
 Siemens AG, 2003. All rights reserved
10.03
Cross reference: -
Protection level:
3/3
Active:
Immediately
Cross reference: -
Protection level:
3/3
Active:
Immediately