Chapter 8 Logic Instructions
8-319
which is controlled for the first time, they can use the automatic tuning function to make an initial
adjustment (PID_MODE is set to 1). After the tuning of the parameter is complete, PID_MODE is set
to 0. The controlled environment in this sample is an oven. The program example is as below
The variable table and program
1. Global variable table
Variable name Data type Current value
2. Local variable table
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