Productivity 1000 Series PLC PID Ramp Soak Instruction

PID Ramp Soak Instruction
The purpose of a ramp soak instruction is to make gradual, controlled changes in temperature (Ramp), followed by a temperature hold (Soak) period.
We will be using our Proportional-Integral-Derivative PID Instruction that we looked at last time to apply the ramp/soak instruction.

Using the immersion heater in a cup of water to keep the temperature at a constant value, we will be adjusting the profile of the temperature as we increase the set point (Ramp) and hold that set point for a predetermined time. (Soak)

We will be modifying our existing program from our PID loop instruction. Let’s get started. Continue Reading!

Productivity 1000 Series PLC PID Instruction

PID Loop (PID) Instruction (Auto Tuning)
A Proportional-Integral-Derivative algorithm is a generic Control Loop feedback formula widely used in industrial control systems. A PID algorithm attempts to correct the Error between a measured process variable and the desired setpoint by calculating and then outputting a corrective action that can adjust the process accordingly and rapidly, to keep the Error to a minimum.

The following links will explain the PID instruction.
https://www.csimn.com/CSI_pages/PIDforDummies.html
http://www.ni.com/white-paper/3782/en/
https://en.wikipedia.org/wiki/PID_controller
We will be using an immersion heater in a cup of water to keep the temperature at a constant value. Using the Productivity Suite software we will perform an autotune on our PID instruction.

Our immersion heater will be controlled through a relay using time proportional control from our PID output. Let’s get started. Continue Reading!

C-More EA9 HMI Series Panel Installing the Software

The C-more Programming Software is a free download from Automation Direct. The software can run in DEMO (demonstration) mode or a key can be purchased to unlock this software. This powerful C-more Touch Panel programming software makes HMI touch screen panel setup and programming quick and simple. Simply drag and drop the objects from the object bar onto the screen construction area. A complete set of control panel objects include pushbuttons, selector switches, pilot lights, text and numeric data displays, bar graph displays, static and dynamic bitmapped images and more. Configure your PLC tags and click on the objects you want to use. A built-in simulator will allow you to review your work on the computer before downloading the project.

We will be installing the C-more Programming Software onto our PC (computer). This will be the DEMO mode of the program. The DEMO mode will do the following:
– You CAN download our sample projects and explore the capabilities of C-more.
– You CAN use the Simulator to test your project on the PC and see how the Simulator can save you hours of programming time.
– You CAN create your own objects, and save them in your object library.
– You CAN explore the online help, and find answers to many questions that might not be covered here on the website.
The full package will allow you to save your projects, download them to a panel and includes the full symbol factory library with over 4000 symbols.
Let’s get started. Continue Reading!