3.3 OPC UA for PROFINET Encoder terms

3.3.1 Controller

The Controller is a controlling device which is associated with one or more Encoders. Related to the automation system, the Controller is the host for the overall automation (See [ENCP], chapter 5.1.1).

3.3.2 P-Device

The P-Device (peripheral device) is a field device and the host device for the Encoder Unit. The
P-Device typically is associated with one or more Controller devices (See [ENCP], chapter 5.1.1).

3.3.3 Supervisor

The Supervisor typically is an engineering device which manages provisions of configuration data (parameter sets) and collections of diagnosis data from P-Devices and/or Controllers (See [ENCP], chapter 5.1.1).

3.3.4 Encoder Unit

An Encoder Unit is a part of a P-Device containing one or multiple Encoder Objects. (See [ENCP], chapter 5.2.3).

3.3.5 Encoder Object

An Encoder Object is a part of an Encoder Unit and contains the Process Control Task. The Encoder Object shall comprise the mandatory functionality: Parameters, measuring task, IO Data (setpoint values, actual values), support for diagnosis mechanism, clock synchronous operation and fault buffer (See [ENCP], chapter 5.2.4).

3.3.6 Process Control Task

The Process Control Task is part of an Encoder Object and is the task that takes the measurements and calculates the results (See [ENCP], chapter 5.2.4).