An absolute encoder does not replace the limits
A servo can use an incremental or absolute encoder; encoder type and motor wattage are selected independently.
- TypeOn the servo page
- AbsoluteCan skip homing
- LimitsStay in place
- InputNPN 24 V is common
Encoder type and position retention
An incremental encoder usually establishes position through homing after power-up. An absolute encoder can retain the previous position, so some machines can start without another homing cycle.
Encoder type and the 100W to 1500W power rating are separate configuration fields, selected from the servo model and operating requirements.
Confirm the limits separately
| Encoder | What it can change | What it does not change |
|---|---|---|
| Incremental | Homing is usually required to establish position | The limit sensors still have to be confirmed |
| Absolute | Many machines do not home on every power-up | The limit sensors still have to be confirmed |
Confirm the sensor level, the mounting direction, and the terminal names on the unit. NPN 24 V is a common input, not a substitute for the silkscreen.
Encoder and limit wiring
- Encoder wiring and the full terminal sheet are supplied for the selected servo model.
- Include the encoder type, axis count, and limit sensor type in the inquiry.
- Positive and negative limits provide travel protection and are configured separately for the machine.
Position and protection
Application: the servo page already says absolute, and the question is whether homing can be reduced.
Configuration: the limit sensors, the level, and the silkscreen terminals. Do not pick a default encoder when the type is unknown.
Related information
Related pages: Integrated servo drive, Limit sensors