Absolute Measuring Systems - Bosch Rexroth IndraDrive MPH-02 Functional Description

5-62
Motor, Mechanical Axis System, Measuring Systems

Absolute Measuring Systems

Evaluating Position
Measurement
Encoders of Rexroth Housing
When temporarily incorrect encoder signals are detected the drive
generates the warning
• E2074 Encoder 1: encoder signals disturbed
- or -
• E2075 Encoder 2: encoder signals disturbed
The warning remains active until the drive is switched off or switched to
communication phase P2!
When incorrect encoder signals are detected the drive generates the
error message
• F8022 Enc. 1: enc. signals incorr. (can be cleared in ph. 2)
- or -
• F2042 Encoder 2: encoder signals incorrect
When the voltage of the battery of the encoder data memory has fallen
below the determined limit value, the drive generates the following error
message:
• F2048 Low battery voltage.
See also "Error Reactions" in chapter "Drive Functions"
Brief Description
Depending on their design and the mechanical arrangement at the axis,
position encoders can be evaluated by IndraDrive controllers as
• relative encoders (incremental encoders)
- or -
• absolute encoders (absolute value encoders)
if they have the required signal specification.
Rexroth position encoders and motor encoders of Rexroth housing
motors are available as
• single-turn encoders (absolute actual position values over one encoder
shaft revolution)
- or -
• multi-turn
4096 encoder shaft revolutions).
These encoders can be evaluated as absolute encoders if the travel
range of the axis can be represented within the absolute actual position
value range of the encoder:
• in the case of single-turn encoders within one encoder shaft revolution
• in the case of multi-turn encoders within 4096 encoder shaft
revolutions
As a standard, Rexroth housing motors are equipped with a position
Motors measuring system. The individual motor series have different measuring
systems which allows offering cost-efficient motors depending on the
application.
The following measuring systems are used:
• HSF ("high-resolution servo feedback"), single- or multi-turn type
• resolver, single- or multi-turn type
encoders (absolute actual
MPH-02, MPB-02, MPD-02
position values
DOK-INDRV*-MP*-02VRS**-FK01-EN-P
over