Siemens SINUMERIK 840D Description Of Functions page 128

4 Firmware Drive Functions
4.5 Output of manipulated variables
5467 NEG_DUAL_GAIN_COMP_FLOW
Knee-point compensation neg. flow
Unit: Default:
% 10.0
5468 NEG_DUAL_GAIN_COMP_VOL TAGE
Knee-point compensation neg. voltage
Unit: Default:
% 10.0
5485 POS_DUAL_GAIN_COMP_S_FLOW
Knee-point compensation pos. flow saturation
Unit: Default:
% 100.0
5486 POS_DUAL_GAIN_COMP_S_VOL T
Knee-point compensation pos. voltage saturation
Unit: Default:
% 100.0
4-128
SINUMERIK 840D/SIMODRIVE 611 digital Descr. of Functions HLA Module (FBHLA) – 04.00 Edition
Minimum: Maximum:
0.2 95.0
Minimum: Maximum:
0.2 95.0
To calculate the inverse characteristic, the knee-point in the positive quad-
rant of the valve characteristic is defined in MD 5464 and MD 5465 and in
the negative quadrant with MD 5467 and MD 5468.
The positive and negative valve flows at the knee-point referred to rated flow
(MD 5107) are entered in 5464 and MD 5467 respectively.
The positive and negative valve voltages at the knee-point referred to rated
valve voltage (MD 5109) are entered in MD 5465 and MD 5468 respectively.
When the same values (defaults) are set in MD 5464 and MD 5465, the
characteristic is linear (without breakpoint in the zero range (default and
without saturation (default)).
These breakpoint data are preset from the valve data (MD 5110, MD 5111)
during the "Calculate controller data" operation. The presettings can be al-
tered later. The rounding range is not a valve data and is therefore only pre-
set to a default value. It can however be changed later by the user (MD
5466). If necessary, a measurement can be taken to obtain a precise set-
ting.
Note
A constant machining velocity of the drive directly at the knee-point of the valve
is not recommended.
S
Valve characteristic with breakpoint at beginning of a saturation region
Minimum: Maximum:
0.2 100.0
Minimum: Maximum:
0.2 100.0
Cross ref.: –
Relevant for: Protection level:
HLA 3/3
Data type: Effective:
FLOAT Immediately
Cross ref.: –
Relevant for: Protection level:
HLA 3/3
Data type: Effective:
FLOAT Immediately
Cross ref.: –
Relevant for: Protection level:
HLA 3/3
Data type: Effective:
FLOAT Immediately
Cross ref.: –
Relevant for: Protection level:
HLA 3/3
Data type: Effective:
FLOAT Immediately
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04.00 04.00
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