Lenze ETC Motion Control - Manual (Page 36)

Getting started
Parameterising drives via machine constants
Overview of the most important machine constants
2
2.8
2.8.1
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36 EDSTCXN EN 2.0
2.8 Parameterising drives via machine constants
The properties of the drives must be parameterised both in the drive itself
and in the control system.
In the control system, the properties are assigned via machine constants
(MCs). A machine constant consists of a keyword and the corresponding
values; for example "MK_VMAX 20".
The machine constants are saved on the PC in a text file with the extension
.mk (e.g. ETCHC.mk for the ETCHC) and are loaded into the control system via
the ETC−MMI. The machine constants can be changed after loading via a
dialogue in the ETC−MMI.
2.8.1 Overview of the most important machine constants
The machine constants listed in the following are mandatory for the
operation of the drive. In relation to the drives, they are only a subset of the
required parameterisation. For a detailed description of all machine
constants, refer to chapter "Machine constants" (
¶ 190).
(
Stop!
The control system only initialises the drives via its machine
constants and determines path−related parameters. The
control−related parameters, the safety functions of the drives
and the parameters of the reference run must be parameterised
in the drive itself by means of the GDC (Global Drive Control).
MC keyword No. of
values
Values Meaning
MK_TEST_OHNEMECHANIK 1 0, 1 0: "Achsrechner" ("Axis computer") of
the NC firmware works and considers
the actual position counter of the
drive.
1: "Achsrechner" ("Axis computer") of
the NC firmware works, but simulates
the actual position counter of the drive
(actual position = desired position for
the test of the NC function without
mechanics).
MK_SPS_DUMMY 1 0, 1, −1 0: with integrated PLC function
1: without integrated PLC function
−1: without integrated PLC function,
releases are reset
Test setting