Drive Data - Siemens SINAMICS S120 System Manual

5.9

Drive data

Valve/drive connection
Parameters p0343, p0346, p0347 and p0348 provide information about the valve/drive
connection. They are used to preset other parameters for "Calculate drive model data" and
"Calculate controller data". If there is a line between the valve and cylinder, then the dead
volume of the line can be calculated from the pipe length (A and B sides) and the inner line
diameter. If the valve is mounted directly onto the cylinder, then zero must be entered as line
length. The dead volume influences the drive natural frequency and the position adaptation
of the force controller or the stiction compensation with voltage pulse.
Mechanical design of drive
The movement of the piston rod is transmitted to other mechanical components (e.g. table,
tools, ...). The total moved mass must be specified as parameter (p0341).
Note
The mass of the drive is a critical parameter and should be calculated as exactly as possible!
The mounting position of the cylinder (p0344) specifies to what degree the force due to the
weight of the moved mass (p0341) is taken into account in calculating the servo gain and
maximum retraction/extension velocity.
It is assumed that the moved mass will act in the direction of the cylinder axis. If the weight
of the moved mass does not act in this direction, then p0344 must be converted accordingly.
For the HLA, a distinction is made between two different mounting methods:
• The cylinder is fixed, the moved mass is attached to the piston rod p0343.0 = 0
• The piston is stationary, the moved mass is attached to the cylinder p0343.0 = 1
"Calculate drive model data" and p0340.4 =1 calculates the force due to weight applied to
the cylinder from p0341 to p0343 and enters the result in p1532.
Hydraulic Drive
System Manual, 04/2015, 6SL3097-4BA00-0BP1
Drive functions
5.9 Drive data
183