Fine Adjustment And Optimization - Siemens SINUMERIK 840D Description Of Functions

3 Start-Up

3.9 Fine adjustment and optimization

3.9 Fine adjustment and optimization
3.9.1 Control direction, travel direction
General
Limitation of
manipulated
voltage
Determine
control direction
(step 1)
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SINUMERIK 840D/SIMODRIVE 611 digital Descr. of Functions HLA Module (FBHLA) – 04.00 Edition
On completion of start-up, the control loop settings must be checked.
The control direction can be reversed by the following methods:
S
Manipulated voltage
S
Actual value inversion
S
Scale rotation
S
Piping A ³ A to A ³ B (inversion)
Any adjustment in the hydraulic piping can be cancelled by inversion of the ma-
nipulated voltage.
If the scale is rotated or attached at the wrong point (jacket or rod of cylinder),
the control direction can be adjusted by means of actual value inversion.
The manipulated voltage must be limited before the system is first switched on
for a control direction check.
MD 5475: OUTPUT_VOLTAGE_LIMIT [ 1 V
Note
It is not necessary to determine the control direction if the drive can already
operate in JOG mode. In this case, continue with step 2!
When the enabling signals are set, the axis may move in an uncontrolled man-
ner.
Causes:
S
Incorrect control direction of velocity controller
– Actual value encoder mounting
– Combinatorial connections of servo solenoid valve and cylinder
– Manipulated voltage polarity reversed
S
Incorrect control direction of position controller
– Actual value encoder mounting
Fig. 3-17 shows the methods which can be used to adjust any uncontrolled tra-
versing movements.
Note
When valve end A is connected to cylinder end B (MD 5140=1), inversion of
the valve manipulated variable (MD 5476) is preset by "Calculate controller
data".
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