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MPH-02, MPB-02, MPD-02
Resolution
Unit of the Emulated Position
Scaling-Dependent Emulation
DOK-INDRV*-MP*-02VRS**-FK01-EN-P
Resolution and Unit of the Emulated Signal
The output data format (i.e. the resolution) for the emulated SSI position
is determined in parameter P-0-0903, Encoder emulation resolution.
The input range and the unit of the value in parameter P-0-0903 are
depending on:
• type of construction of motor:
• rotary motors
• linear motors
•
parameterized scaling
(cf. S-0-0076, Position data scaling type)
Note:
The emulated digital position value is always displayed with
24 bits the setting in P-0-0903 defining the resolution of one
revolution (= decimal place). With P-0-0903 = 12 bits, 12 bits
of places before decimal point and 12 bits of decimal places
take effect, for example.
Reference of the Emulated Position
The emulation of the signals "position feedback 1 value", "position
feedback 2 value" and "position command value" depends on the scaling
determined in parameter S-0-0076, Position data scaling type.
The values of emulator and parameters S-0-0051, Position feedback 1
value, S-0-0053, Position feedback 2 value or S-0-0047, Position
command value are synchronous. This simplifies, among other things,
emulation control, e.g. with the commissioning tool "DriveTop".
If "motor reference" is parameterized in S-0-0076, encoder-related
emulation is possible.
If "load reference" is parameterized in S-0-0076, the feed constant and
gear ratio must be additionally entered according to the application.
Note:
The values for position feedback value 3 (measuring encoder)
and master axis position are always emulated in encoder-
related form. Parameter S-0-0076 in this case is irrelevant.
See also "Mechanical Axis System and Measuring Systems: Scaling of
Physical Data" in chapter "Motor, Mechanical Axis System, Measuring
Systems"
Establishing the Position Data Reference (Set Absolute
Measuring)
Using parameter P-0-0012, C0300 Command Set absolute measuring
it is possible to home the absolute position that is output by the absolute
encoder emulator. When setting absolute measuring, the value of
parameter S-0-0052, Reference distance 1 is processed.
See also "Establishing Position Data Reference: Establishing Position
Data Reference for Absolute Measuring Systems" in chapter "Drive
Functions"
Extended Drive Functions
→ bits/revolution
→ bits/mm or bits/inch
9-25
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