MPH-02, MPB-02, MPD-02
Drive Functions
8-31
DOK-INDRV*-MP*-02VRS**-FK01-EN-P
Make the presetting for "set absolute measuring" by determining the
encoder for "set absolute measuring" in
P-0-0612, Control word for
setting absolute measuring
.
Start the command
P-0-0012, C0300 Command Set absolute
measuring
.
See also "Command Input and Acknowledgment" in chapter "Master
Communication"
If "set absolute measuring" is to be executed when the drive is active, the
command
S-0-0148, C0600 Drive-controlled homing procedure
command
has to be started.
See also "Command Input and Acknowledgment" in chapter "Master
Communication"
The respective bit of
S-0-0403, Position feedback value status
displays
whether the encoder selected via S-0-0612 has been homed.
Note:
If the absolute encoder had already been homed, the
respective bit only changes for a short time during command
execution!
When "set absolute measuring" was executed again for an absolute
encoder, a value for the "offset" of the actual position values before and
after command execution is entered in:
•
S-0-0175, Offset parameter 1
(motor encoder)
•
S-0-0176, Offset parameter 2
(external encoder)
After the commands (diagnosis possible via
S-0-0403, Position
feedback value status
) have been executed, the commands started
have to be cleared again in reverse order.
If an absolute encoder was replaced, the following error message is
generated:
•
F2074 Actual pos. value 1 outside absolute encoder window
- or -
•
F2075 Actual pos. value 2 outside absolute encoder window
The position data reference has to be established again!
Shifting the Position Data Reference for Relative and Absolute
Measuring Systems
Brief Description
The existing position data reference of the measuring systems to the axis
can be shifted if the respective command was activated by the master. It
is possible to shift the data reference in standstill or while the axis is
moving. This does not affect the position reference of the axis because it
is only the actual position values output for the master that are displayed
in "shifted" form. Internally the original ("non-shifted") position data
reference is maintained.
Presetting
Starting "Set Absolute
Measuring"
Starting "Drive-Controlled
Homing Procedure" If Necessary
Checking Whether Position Data
Reference was Established
Clearing the Executed
Commands
Detecting Encoder Replacement
All alternative expansion packages
with
closed-loop
characteristic
Courtesy
of
CMA/Flodyne/Hydradyne
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Control
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