OMRON CJ1G-CPU45P-GTC Loop-control CPU Unit

Loop Controllers with Fully Integrated Sequence and Loop Control and Built-in Gradient Algorithm for Uniform Temperature Control Across Multiple Points   Inconsistent thermal processing temperatures result in unstable workpieces and reduced yield.   OMRON's unique Gradient Temperature Control technology enables uniform in-plain control of thermal processing temperatures. This not only increases the quality of thermal processing, but also reduces energy loss while the temperature stabilizes and the adjustment time required to eliminate interference caused by heaters.   This has a great impact on batch ovens, glass substrate hot plates, and other precise process control.

What is Gradient Temperature Control?

Gradient temperature control enables controlling the temperature of an object subject to interference at multiple points, such as the multi-point control of surface temperature using multiple heaters. It directly controls the average temperature of all points and the temperature difference between points and also eliminates interference from the control outputs from one point to another.   The temperature for each point is input and the average temperature for all points and the gradient temperature (temperature difference) between each pair of neighboring points is calculated. PID control is performed using each of these values as a process value. PID manipulated variable outputs are distributed to prevent the outputs from affecting other PID control, i.e., to prevent interference. This means that interference from multiple heaters to other measurement points is reduced and the temperature of multiple points can be raised and controlled uniformly.

Features

Greater Quality with Uniform In-plain Temperature Control ** Click on the picture to enlarge. Gradient Temperature Control Mechanism and Programming Examples   Gradient temperature control finds and controls the relationship between temperatures for mutually interfering points, i.e., it finds the average temperature and the gradient temperatures, which are the temperature differences between points. This type of control achieves uniform in-plan temperatures. ** Click on the picture to enlarge.

Posted in: PLC-Based Process Controllers