Example "PID control"
4.5 Configure PID controller
STEP 7 Basic V10.5
Getting Started, 12/2009, A5E02651459-01
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4.5 Configure PID controller
Introduction
The following steps show you how to use the technological object "PID_Compact" to
configure the PID controller.
Settings for configuring the PID controller
● Controller type
The controller type is used to define a pre-selection for the unit of the value to be
controlled. In this example, "Temperature" with the unit "°C" is used as the controller type.
● Input/output parameters
In this area you supply the input and output parameters for setpoint, actual value and the
controlled variable of the technological object "PID_Compact". To use the PID controller
without additional hardware, link the input and output parameters of "PID_Compact" to
the "output_value" and "temperature" tags interconnected to the simulation block
"PROC_C":
– The actual value is simulated by "PROC_C" and used as input of "PID_Compact".
In the example the actual value corresponds to the measured temperature in the
heating chamber, which is mapped in the "temperature" tag.
– The controlled variable by calculated by the technological object "PID_Compact" and
is the output parameter of the block. The controlled variable is mapped in the
"output_value" tag and is used as input value of "PROC_C".
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