Difference between revisions of "Setpoint signal"
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| + | [[File:Setpoint and actual.png|thumb|400px|An example setpoint signal (target value) and measured response signal (realized output value) of a system.]] | ||
Setpoint (a.k.a reference) signal is a signal that will be used as ''target value'' in control systems. Typical occurrencies of setpoint signals in GD products are: | Setpoint (a.k.a reference) signal is a signal that will be used as ''target value'' in control systems. Typical occurrencies of setpoint signals in GD products are: | ||
* Position setpoint | * Position setpoint | ||
Revision as of 18:33, 6 August 2013
Setpoint (a.k.a reference) signal is a signal that will be used as target value in control systems. Typical occurrencies of setpoint signals in GD products are:
- Position setpoint
- Velocity setpoint
- Torque setpoint
I.e. position setpoint value may be "1234" which could mean a target position of 1234 mm in some linear actuator. Or torque setpoint of 5.0 could mean that motor is asked to produce 5 Nm torque.
Physical setpoint signal types
Setpont signals may have several representations in real world such as:
- Analog setpoint 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 as velocity setpoint, the relation between input to output types could be 1 Volt per 100 rpm (or any other scale).
Setpoint signal characteristics
| Analog | Pulse & dir or Quadrature | PWM | Network | |
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| Scale & range | Absolute (limited) | Incremental (infinite) | Absolute (limited) |
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| Setpoint uses in motion control | Torque, velocity | Position, velocity | Torque, velocity | Position, torque, velocity, parameters |
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