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E300 Installation and Commissioning Guide
Issue Number: 1
Table 6-5 Supported feedback types
Position Feedback Type:
Incremental Position
feedback devices provide incremental feedback only and do not give absolute position feedback. The position is zero at
power-up and accumulates the change of position from that point on. These devices are suitable for motor control in RFC-A mode. In RFC-S mode, a
phasing autotune is required each time the drive is power cycled.
Incre Absolute Commutation Position
feedback devices with commutations signals are intended to provide absolute position feedback for
motor control in RFC-S mode. The commutation signals are not used in RFC-A mode.
The commutation signals are used in RFC-S mode to determine the motor position after position feedback initialization, and after drive power up.
There must be one period of the commutation signals for each pole pair for a rotary motor (i.e. 3 commutation signal periods per revolution for a 6
pole motor). It should be noted that for a movement of up to
1
/
3
of the commutation signal period after position feedback initialization drive power up,
the maximum motor torque is limited to 0.866 of the maximum possible torque.
Absolute commutation signals only
Incremental SINCOS
An incremental SINCOS encoder can be used in the same way as an AB incremental encoder, except that the position
resolution is increased with interpolation. These devices are suitable for motor control in RFC-A mode. They can also be used for RFC-S mode, but a
phasing autotune is required each time the position feedback is initialized, the drive is power cycled.
Incremental Absolute comms
The absolute position is obtained after position feedback initialization via the comms interface and then
after that point by tracking the incremental change from the SINCOS signals. Interpolation is used to increase the position resolution. The comms
interface can also be used for bi-directional transfer of data between the drive and encoder (except SSI comms).
These devices can be used for motor control in both RFC-A and RFC-S.
Absolute comms
The absolute position is obtained at all times via the encoder comms. The comms interface can also be used for bi-directional
transfer of data between the drive and the encoder (except SSI mode). These devices can be used for motor control in RFC-A or RFC-S mode.
absolute single SINCOS
feedback for motor control in RFC-S mode. If one of these devices is used for RFC-A mode the additional sine wave signals and the Z1 marker signal
do not affect the motor control position feedback.
Communications:
Hiperface
Hiperface is an asynchronous bi-directional comms protocol that is only used with incremental sine waves. It can be used to check the
position derived from the sine waves or for bi-direction data transfer between the drive and encoder. A checksum is provided for error checking.
EnDat 2.1
EnDat 2.1 is a synchronous bi-directional comms protocol that is intended to be used with incremental sine waves. It can be used to check
the position derived from the sine waves or for bi-directional data transfer between the drive and encoder. It can also be used as an absolute comms
only type position feedback interface, but the resolution of the position feedback may be limited. If it is used in this way, it is not possible to use the
position feedback via comms at the same time as communication with the encoder for data transfer. A CRC is provided for error checking.
EnDat 2.2 and BiSS C Mode
EnDat 2.2 and BiSS are synchronous bi-directional comms protocols that are intended to be used alone. It is possible
to obtain position feedback at the same time as communicating with the encoder for data transfer. A CRC is provided for error checking.
SSI
SSI is a uni-directional comms protocol which is intended to be used alone. The encoder provides position information only, with no possibility of
data transfer between the drive and encoder. No error checking is provided by the SSI protocol.
Signals
Position feedback type
Communications
0: AB
Quadrature
Incremental
None
1: FD
Frequency and direction
Incremental
None
2: FR
Forward and reverse
Incremental
None
3: AB Servo
Quad commutation
Incre Absolute commutation
None
4: FD Servo
Frequency and dir commutation
Incre Absolute commutation
None
5: FR Servo
Forward and r commutation
Incre Absolute commutation
None
6: SC
SINCOS
Incremental SINCOS
None
7: SC Hiperface
Hiperface comms
SINCOS incre Absolute comms
Hiperface
8: EnDat
EnDat comms
Absolute comms
EnDat 2.1, EnDat 2.2
9: SC EnDat
EnDat comms
SINCOS incre Absolute comm
EnDat 2.1
10: SSI
SSI comms
Absolute comms
SSI
11: SC SSI
SSI comms
SINCOS incre Absolute comm
SSI
12: SC Servo
commutation
Incre Absolute commutation
None
13: BiSS
BiSS comms
Absolute comms
BiSS
15: SC SC
single SINCOS per rev
absolute single SINCOS
None
16: Commutation
Commutation only
Absolute commutation only
None
Содержание E300 Series
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