Bits Multiturn - BONFIGLIOLI Active Cube User Manual

No.
1271 Bits/Turn
Note:
Note:

8.4.8 Bits Multiturn

If a multiturn absolute value encoder is used (EnDat 2.1, Hiperface, SSI), the number
of Bits/Turn (referred to encoder) for the multiturn resolution must be configured in the
frequency inverter. In the case of Hiperface and SSI encoders, the value specified in
the data sheet of the encoder used must be entered in parameter
In the case of EnDat 2.1, the value is read automatically from the EnDat encoder and
used internally. Parameter
encoders.
No.
1272 Bits Multiturn
Note:
Note:
03/12
Parameters
Description
The internal resolution of one motor revolution is 16 bit. The resolution of
1271 is converted to the internal resolution if the encoder is
Bits/Turn
used as a motor encoder.
In the case of application encoders, the reference between motor and
application encoder is parameterized through the gear factors
513 and
Factor Numerator
In the case of linear encoders, this value must be set according to chap-
ter 6.6.
Bits Multiturn
Parameters
Description
The position of the motor is resolved at a total of 31 bits + sign bit. The
lower 16 bits are used for the motor position angle the higher 16 bits are
used for the number of motor revolutions and the sign.
If the absolute value encoder is used as a motor encoder, the following
shall apply:
If the number of
Bits Multiturn
bits are filled internally in the frequency inverter. These additional bits
are used for overflow saving of the revolutions so that 2
(including one sign bit) can be managed safe against zero voltage.
If the number of
Bits Multiturn
cy of the encoder exceeds the accuracy of the inherent resolution of the
frequency inverter.
In the case of application encoders, the reference between motor and
application encoder is parameterized through the gear factors
513 and
Factor Numerator
In the case of linear encoders, this value must be set according to chap-
ter 6.6.
EM-ABS-01 for ACU
Settings
Min. Max.
0 bits/t 32 bits/t
EC2 Gear Factor Denominator
1272 is not evaluated in the case of EnDat
Settings
Min. Max.
0 Bit 32 Bit
1272 is smaller than 16 bits, the missing
1272 is greater than 16 bits, the accura-
EC2 Gear Factor Denominator
Factory set-
ting
13 bits/t
EC2 Gear
514 .
1272 .
Bits Multiturn
Factory set-
ting
13 Bit
16
revolutions
EC2 Gear
514 .
105