Parker Compax3 Fluid T40

Parker EME
Motion control
192-121102 N04 June 2008 177
5.5.2. Procedure when working with the C3_getSystemFingerPrint
Example of a valve characteristic line (volume current via control signal):
Procedure:
 Specification of the travel range available for the measurement with min_Position
and max_Position.
 Setting max_Velocity (is valid symmetrically for positive and negative values).
With max_Velocity, you make 2 settings at once: the max. velocity during the
measurement and the measurement range.
Connection between velocity (max_Velocity) and the relative volume current:
%100_
___[%]__
max_
⋅
⋅
=
surfaceACylinder
currentvolumenominalValvecurrentvolumerelative
Velocity
(Value_nominal_volume_current Valve-nominal-volume-current;
Cylinder_surfaceA: Cylinder_surface-A
max_Velocity should be set at least so high that the measurement exceeds the
non-linear range shown above, as the characteristic line is continued at the same
slope outside the measured velocity range.
 the Number_of_Measuring_Points should be set high enough so that the non-
linearity to be emulated can be exactly detected (typically N=100).
 Start of the measurement by positive edge at the Execute input.
 The state of the measurement can be monitored via the Status, Done, Error and
ErrorID outputs.
 A positive edge at the Done output shows the successful termination of the
identification:
 Measurement terminated successfully
 The characteristic line was inverted and written into the FLASH memory.
 In the conditioning chain responsible for the measured system, the curve ID
was already set to the new characteristic line and the characteristic line
compensation was activated.