Difference between revisions of "Setpoint signal"
From Granite Devices Knowledge Wiki
| [checked revision] | [checked revision] |
(→Reference signal characteristics) |
m (moved Reference signal to Setpoint signal) |
(No difference)
| |
Revision as of 21:14, 24 June 2013
Reference signal is a signal that will be used as target value in control systems. Typical occurrencies of reference signals in GD products are:
- Position reference
- Velocity reference
- Torque reference
I.e. position reference value may be "1234" which could mean a target position of 1234 mm in some linear actuator. Or torque reference of 5.0 could mean that motor is asked to produce 5 Nm torque.
Physical reference signal types
Reference signals may have several representations in real world such as:
- Analog reference signal
- Pulse and direction signals
- PWM signal
- Serial communication command
In these cases there will be a conversion between input and output units. For example when using +/-10V reference as velocity reference, the relation betveen input to output types could be 1 Volt per 100 rpm (or any other scale).
Reference signal characteristics
| Analog | Pulse & dir or Quadrature | PWM | Network | |
|---|---|---|---|---|
| Scale & range | Absolute (limited) | Incremental (infinite) | Absolute (limited) |
|
| Reference uses in motion control | Torque, velocity | Position, velocity | Torque, velocity | Position, torque, velocity, parameters |
| Pros |
|
|
|
|
| Cons |
|
|
|
|
