Encoder Emulation; Brief Description - Bosch Rexroth IndraDrive MPH-02 Functional Description

9-18
Extended Drive Functions
9.3

Encoder Emulation

Base package of all variants in closed-loop characteristic

Brief Description

Shifting the Position Data Reference
Master-side writing of parameter
• P-0-0087, Actual position value offset of measuring encoder.
Shifting the position data reference already takes effect as of
communication phase "P2".
The shifting of the actual position values can be checked in:
• P-0-0052, Actual position value of measuring encoder
Other Diagnostic Messages Relevant to Measuring
Encoder
• C0161 Incorr. parameterization of measuring enc. (hardware)
• C0162 Measuring encoder unknown
• C0227 Error when initializing position of measuring encoder
• C0228 Initialization velocity measuring encoder too high
• E2076 Measuring encoder: encoder signals disturbed
• F2043 Measuring encoder: encoder signals incorrect
• F2179 Modulo limitation error of measuring encoder
By means of encoder emulation is it possible to convert available encoder
signals (encoder 1, encoder 2 or measuring encoder) or internal position
command values into one of the following two formats:
• 5V-TTL signal of an incremental encoder in the case of incremental
encoder emulation
• serial 24-bit position of an absolute encoder (SSI format) in the
case of absolute encoder emulation
This allows, for example, evaluating the signals in a higher-level master in
order to close the position loop in the external control unit in conjunction
with the freely parameterizable resolution and the data reference.
Note: Using the encoder emulation in precision applications
(mostly in machine tool applications) is considered as critical
(see restrictions under "Notes on Commissioning") and always
has to be carefully considered beforehand!
For sophisticated applications Bosch Rexroth recommends to
use digital interfaces, such as SERCOS interface.
See "Notes on Commissioning: Restrictions" in the same section
MPH-02, MPB-02, MPD-02
DOK-INDRV*-MP*-02VRS**-FK01-EN-P