FB1.ENCRES

Description

This parameter sets or gets the resolution of the motor encoder (encoder feedback systems only) in number of counts per revolution for a rotary motor and the number of encoder pitches per motor pole pitch for a linear motor. The number of encoder counts per revolution is obtained by multiplying the motor catalog resolution in units of PPR by four. For example, for a 1024 PPR resolution motor, the number of encoder counts per revolution is 1024*4 = 4096. For this motor FB1.ENCRES must be set to 4096.

For linear motors, the value of FB1.ENCRES is set to the number of encoder pitches per motor pole pitch. For a motor with 32 mm pole pitch, and a 40 µm encoder pitch, the value for FB1.ENCRES should be set to 32 mm/40 µm = 800.

Depending on the value of FB1.IDENTIFIED, FB1.ENCRES changes between read-only and read-write. The following table lists the FB1.IDENTIFIED values and FB1.ENCRES's corresponding type.

FB1.IDENTIFIED value FB1.ENCRES type
10 (Incremental encoder) R/W
11 (Incremental encoder, no halls) R/W
20 (Sine encoder) R/W
21 (Sine encoder, no halls) R/W
30 (EnDat 2.1) R/O
31 (EnDat 2.2) R/O
32 (biSS) R/O
33 (HIPERFACE) R/O
34 (biSS Mode C) R/W
40 (Resolver) R/W
41 (sfd) R/O
42 (Tamagawa) R/O

General Information

Type

Depends on FB1.IDENTIFIED.

Units

Encoder counts

Range

0 to 232-1

Default Value

1,024

Data Type

Integer

See Also

N/A

Start Version

M_01-00-00-000

FieldbusClosed A Fieldbus is an industrial network system for real-time distributed control (e.g. CAN or Profibus). It is a way of connecting instruments in a plant design

Index/Subindex

Object Start Version

EtherCATClosed ***EtherCAT is an open, high-performance Ethernet-based fieldbus system. The development goal of EtherCAT was to apply Ethernet to automation applications which require short data update times (also called cycle times) with low communication jitter (for synchronization purposes) and low hardware costs COE and CANopen

/0

M_01-00-00-000

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