Bosch Rexroth IndraDrive MPH-02 Functional Description page 532

9-4
Extended Drive Functions
Measuring Signal Selection
Storing Measured Values and
Measured Value Differences
In addition, other modalities of measured value detection for one probe
input can be preset in parameter P-0-0226, Probe, extended control
word:
• switching from position measurement to time measurement
• limitation of a range for actual position values ("expectation window")
in which measurements can take place. A "trigger failure monitor" can
be activated for the "expectation window" which registers the passing
through of this range without probe event.
The selection of the signal the value of which is measured at the
respective measured value trigger takes place by entering the respective
IDN in the corresponding parameter
• S-0-0426, Signal select probe 1,
• S-0-0427, Signal select probe 2.
The IDNs of the parameters assigned to the selectable measuring signals
are listed in S-0-0428, Probe, IDN list signal selection:
• S-0-0051, Position feedback 1 value
• S-0-0053, Position feedback 2 value
• P-0-0052, Actual position value of measuring encoder
• P-0-0227, Cam shaft profile, access angle
• P-0-0753, Position actual value in actual value cycle
• P-0-0775, Resulting master axis position
• P-0-0776, Effective master axis position
Should the time measurement for a probe input have been activated in
P-0-0226, Probe, extended control word, the signal selection made for
this probe is inactive.
Note: The time measurement is only relative! The generation of the
measured value
advantageous for the time measurement. Depending on the
available hardware and firmware and the performance setting
in P-0-0556, Control word of axis controller, time
differences can be measured with a precision of 4 µs:
- time differences up to 1000 s for basic performance
- time differences up to 500 s for advanced performance
Depending on the switching edge of the probe signal that was activated
as measured value trigger (setting in S-0-0169), the measured value of
the signal selected from the list parameter S-0-0428 is stored in one of
the following parameters:
• S-0-0130, Probe value 1 positive edge
• S-0-0131, Probe value 1 negative edge
• S-0-0132, Probe value 2 positive edge
• S-0-0133, Probe value 2 negative edge
In the case of continuous measurement, the difference from the last two
measured values of the same probe, that were measured with opposed
(positive/negative/positive...) measured value trigger, is always generated
in addition (setting in S-0-0169). This difference is stored in the
corresponding parameter:
• P-0-0202, Difference probe values 1
• P-0-0203, Difference probe values 2
MPH-02, MPB-02, MPD-02
difference () therefore
DOK-INDRV*-MP*-02VRS**-FK01-EN-P
is especially