Compatibility; Accuracy - Bosch Rexroth MAD Project Planning Manual

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Application notes
9.11.2

Compatibility

Encoder option
ADVANCED
C0 +
M2
+
S2
+ ⇒ compatible
- ⇒ incompatible
9.11.3

Accuracy

Absolute
Bosch Rexroth AG R911295781_Edition 11
within one revolution. The encoder features a data memory which contains all
relevant motor parameters required for commissioning the motor.
"M2": Multi-turn absolute encoder with EnDat2.1 interface. Sine/cosine sig‐
nals 1V with 2048 lines per revolution and absolute period assignment with‐
pp
in 4096 revolutions. The axis position remains stored in the event of a voltage
failure. The encoder features a data memory which contains all relevant mo‐
tor parameters required for commissioning the motor.
"C0": Incremental encoder. Sine/cosine signals 1 Vss with 2048 periods per
revolution.
"N0": The motor is delivered without any factory-mounted encoder unit. The
motor is closed with a cover on its rear.
For more information on the supply voltage required for the motor
encoders, please refer to
Due to different encoder technologies, the motor encoders can be connected
to certain drive controllers and interfaces only. The encoder data has to be
parameterized in the controller. The following table gives an overview of the
compatibility:
IndraDrive
BASIC
BASIC
SERCOS
OPENLOOP
- -
+ +
Tab. 9-15: Encoder compatibility
The accuracy of rotary encoders is divided into "absolute accuracy" and "rel‐
ative accuracy".
The absolute accuracy of rotary encoders is primarily determined by the qual‐
ity and precision of the encoder design and the mechanical attachment to the
motor. The following values apply to MAD/MAF motors:
Encoder op‐
tion
Single-turn absolute encoder with EnDat2.1 inter‐
S2
face. Sine/cosine signals 1 Vss with 2048 periods.
Multi-turn absolute encoder with EnDat2.1 interface.
M2
Sine/cosine signals 1 Vss with 2048 periods.
Incremental encoder, sine/cosine signals 1 Vss with
C0
Tab. 9-16: Absolute encoder accuracy
MAD / MAF Asynchronous Housing Motors
tab. 6-1 "Motor encoder" on page
BASIC
BASIC
PROFIBUS
ANALOG
- -
+ +
Technical data
2048 periods.
145.
BASIC
UNIVERSAL
+
+
Absolute
Precision
± 0.0056°
(± 20" )
± 0.0056°
(± 20" )
± 0.0056°
(± 20" )