Using PID basic functions
7.3 TCONT_CP
PID control
234 Function Manual, 03/2017, A5E35300227-AC
Performing pretuning
Requirements
● The instruction and the technology object are loaded on the CPU.
To manually determine the optimum PID parameters for initial commissioning, follow these
steps:
1. Click the "Start" icon.
If there is no online connection, this will be established. The current values for the
setpoint, process value and output value are recorded.
2. Select "Pretuning" from the "Mode" drop-down list.
TCONT_CP is ready for tuning.
3. In the "Output value jump" field, specify how much the output value should be increased.
4. Enter a setpoint in the "Setpoint" field. The output value jump only takes effect when
another setpoint is entered.
5. Click the
"Start tuning" icon.
The pretuning starts. The status of the tuning is displayed.
Performing fine tuning
Requirements
● The instruction and the technology object are loaded on the CPU.
To determine the optimal PID parameters at the operating point, follow these steps:
1. Click the "Start" icon.
If there is no online connection, this will be established. The current values for the
setpoint, process value and output value are recorded.
2. Select "Fine tuning" from the "Mode" drop-down list.
TCONT_CP is ready for tuning.
3. In the "Output value jump" field, specify how much the output value should be increased.
4. Click the
"Start tuning" icon.
Fine tuning starts. The status of the tuning is displayed.
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