C-More EA9 HMI Series Panel Object List Alarms

The C-More HMI Panel software uses virtual components called Objects. These objects are programmable to simulate the functions that you require on your automation project. Pushbuttons, Switches, meters, and graphs are just a few of the objects that are available to you.
The Alarm List Objects include a variety of options to customize the display of alarms as a screen. This is in addition to the alarm banner at the bottom of the screen that shows the active alarms. We also have the Alarm Screen Style setting in Panel Manager.

We will now look at the object list alarms that we can use with our HMI panel. The alarm objects that are available on the C-More EA9 are Alarm List and Call Alarm Screen. Alarms are specified as an event in the C-More HMI panel. We will program both discrete (On/Off) and limits on a range for our event alarms. Let’s get started. Continue Reading!

Click PLC PID using Factory IO

A PID (Proportional, Integral, and Derivative) control is possible with the Click PLC. A sample program was written for this PLC by Bernie Carlton in the following thread from the Automation Direct Forum. This was based on the math/process presented by Tim Wescott on is paper titled PID without a Ph.D. We will be using this sample program along with a Factory IO scene to demonstrate PID control using our Click PLC.

Here are some references on PID control:
PID without a Ph.D. By Tim Wescott
Understanding PID in 4 minutes
PID Control – A brief introduction
PID Controllers Explained
Who Else Wants to Learn about On-Off and PID Control?
Our Factory IO scene will be controlling the level of water in a tank. PID will be used to maintain the level based on a dial pot knob on the control panel. We will also discuss the math that the PID loop uses. Let’s get started! Keep on Reading!