03/12 EM-ABS-01 for ACU 29
6 Commissioning the encoder
This chapter describes how the different encoder types are commissioned.
6.1 General Information
The EM-ABS-01 supports both Singleturn and Multiturn encoders. Multiturn encoders
must be configured as such in order to avoid unwanted effects.
he internal resolution of encoder information is 32 bits, 16 bits for the position in one
turn and 16 bits for the number of turns. Encoders with other properties will be con-
verted to this format internally.
Note: In the case of motor encoders with a multiturn portion of more than 16
bits, clear identification of the position in the frequency inverter is not
guaranteed.
Note: In the case of motor encoders with a multiturn portion of less than 16 bits,
the free bits are filled up to 16 bits and managed in a fail-safe manner.
Example: An encoder has a multiturn portion of 13 bits. 3 bits are ma-
na
ed additionally in the inverter, thus 8 (=2³) overflows of the multiturn
portion are recognized.
This information may be lost in some situations if the DC link is dischar
ed
very quickly due to external conditions.
In the case of usage in positioning applications (configuration x40), the absolute posi-
tion of the encoder can be used for the reference system directly in user units [u].
Using gear factors, a
ear transmission between the encoder and the travel distance
can be considered.
Note:
he input data of the encoder is evaluated via the reference systems. The
evaluated parameters (e.
. motor frequency, drive speed in rev/s, position
in rev.) are available for dia
nosis via actual value parameters, see chapte
8.6 “Actual value display”.
Check the power demand of the encoder to be connected. The internal power supply
unit can only supply a maximum total of 2 W for all consumers connected. In the case
of a higher power demand, connect an external DC 24 V supply to X410A.1 (DC 24
volta
e input) and X410A.2 (GND). BONFIGLIOLI VECTRON recommends connectin
an external power supply. Refer to chapter 5.3.3 “Power supply”.
Note: For supply of the encoder via an external power supply unit, always con-
nect it to X410A.1 (DC 24 V volta
e input) and X410A.2 (GND). Connection
at X210A.1 (DC 24 V voltage input of ACU basic device) and X210A.2
(GND) will not be sufficient for external power supply of the encoder.
Install encoder cables separate from motor cables to minimize interference.
Upon first commissionin
and durin
operation, make sure that the encoder and other
electrical components can acclimatize in order to prevent condensation and resulting
malfunction.
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