DEUTSCHMANN AUTOMATION LOCON 7, Инструкция по эксплуатации, Страница: 31 / 50

24.5.04 Instruction manual LOCON 7, LOCON 9 V. 10.4 31
Deutschmann Automation GmbH & Co. KG Programming LOCON 7 and LOCON 9
7.4 Zero offset
The zero offset or zero-point-correction is used to synchronize the mechanical zero-point of a
machine with the zero-point of an absolute encoder. It makes it possible that the encoder can be
installed in every position; the mechanical zero-point of the machine does not have to corre-
spond with the zero-point of the encoder.
The exact procedure of the zero-point-correction can be taken from the chapters "Reading out
the actual zero offset" and "Programming the zero offset".
If LOCON is used with an incremental encoder, the zero-point-correction is not necessary.
7.4.1 Reading out the actual zero offset
The programmed zero offset can be read out in normal mode by pressing the key (long).
Then the LED "Zero" lights and the difference (zero offset) between the real encoder value and
the desired encoder value (position of machine) is displayed.
This zero offset is normally programmed once on the installation of the absolute encoder. It is
necessary to compensate the difference between the 0°-position of the machine and the 0°-posi-
tion of the encoder with the help of software.
This function is left out for incremental encoders!
The procedure of this correction is described more precisely in the following chapter.
7.4.2 Programming the zero offset
In the normal mode the programming begins by pressing the key (long) and then
(long).
Please note that for an easier operation in this mode the zero offset is not displayed, but the
desired encoder-position.
The LEDs "Prg.Mode" and "Zero" flash.
In most cases the adjustment is made at the mechanical zero-point of the machine, i. e. the
machine runs up to 0°, LOCON is set to "000" with the keys and and confirmed with
.
If the adjustment at the 0°-point of a machine is not possible, it can be carried out at any other
known position. Only the desired position must be input into LOCON.
Leaving this mode is possible either by , then the programmed value is stored, or by , if
the value should be rejected.
This function is inapplicable in connection with an incremental encoder!
7.5 Displaying the active program
Pressing the key in the normal mode causes that the active program appears on the display
in form of "Pxx". "xx" represents the corresponding program number.
The program number on the display can be changed with the keys and .
If there are cams on the outputs in the displayed program, the LEDs "On" and "Off" light at the
same time. Therefore it can be examined very fast, on which program values are programmed.
The normal mode can be reached by pressing the key .
MODE
ESC