MPH-02, MPB-02, MPD-02
Extended Drive Functions
9-23
DOK-INDRV*-MP*-02VRS**-FK01-EN-P
then (if axis has been homed) always have a fixed reference to the
machine zero point.
If the axis has not been homed, there aren’t any zero pulses output!
Note:
As a prerequisite the drive is moved via the position control
loop of the control unit (homing, going to zero) in order to
correctly initialize the zero pulse output.
With the parameter
P-0-0904, Encoder emulation zero pulse offset
the
output of the zero pulse, with incremental encoder emulation having been
selected, can be offset by the input value in lines (or mm or inch). The
input range in P-0-0904 is determined by the setting in
P-0-0903,
Encoder emulation resolution
, because the maximum offset is one
revolution, for example for rotary motors.
If the zero pulse is to be cyclically output depending on the travel
distance, the distance between two zero pulses can be entered in lines (or
mm or inch) in parameter
P-0-0905, Encoder emulation zero pulse
distance
.
The following applies to the zero pulse output:
•
If
one zero pulse per revolution
is required, you have to
parameterize
P-0-0905 = P-0-0903
.
•
A
non-recurring zero pulse
over the entire travel range (at the
machine zero point) can be obtained with
P-0-0905 = "0"
.
•
Outputting
several zero pulses per revolution
is possible with the
parameterization
0 < P-0-0905 < P-0-0903
.
•
Outputting
one zero pulse per n revolutions
is possible with the
parameterization
P-0-0903 < P-0-0905
.
Note:
For cyclical output you have to take into consideration that a
maximum of one zero pulse can be output per output cycle
(i.e. position loop clock).
Establishing the Position Data Reference (Drive-
Controlled Homing)
Drive-controlled homing is possible, too, if the connected control unit
permits it.
Note:
If bit 7 = 1 was set in
P-0-0902, Encoder emulation control
parameter
, the zero pulse is only output after the homing
procedure was successfully carried out. The zero pulse then is
always output at the same position (reference mark).
Note:
When the homing procedure is carried out, the emulated
signals jumps from the original position to the reference
position.
In this case the error message F2053 is suppressed on
purpose and the emulator outputs the increments of the
previous interval again.
See also "Establishing Position Data Reference: Establishing Position
Data Reference for Relative Measuring Systems" in chapter "Drive
Functions"
Zero Pulse Offset
Cyclical Zero Pulse Output
Courtesy
of
CMA/Flodyne/Hydradyne
▪
Motion
Control
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Hydraulic
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426-5480
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