Category Archives: PLC Learning

This offers ways in which you can learn PLC programming.

C-More EA9 HMI Series Panel Object List Indicators

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.

We will now look at the object indicators that we can use with our HMI panel. The indicator objects that are available on the C-More EA9 are Indicator Light, Valve Indicator, Numeric Display, and Multi-State Text Indicator. Let’s get started. Continue Reading!

BRX PLC HTTP JSON Instructions

One of the features of the BRX Series PLC is the ability to expand its capability to fit your application. Software and hardware changes are ongoing so the PLC can grow with your needs. Communication is something that the BRX PLC can do very well. As part of the internet of things (IoT), the BRX will share and exchange data. You can also refer to this as the industrial internet of things. This will suit several industrial applications.

The Do-more Updates Release 2.5.2 on April 22, 2019, has introduced new instructions. Here are the instructions that we will be using:
HTTPCMD – HTTP Request / Response with Server (BRX only)
JSONPARSE – Parse JSON Text (BRX only)
We will be using these instructions to read the weather conditions from a website. Let’s get started. Continue Reading!

C-More EA9 HMI Series Panel Object List Buttons

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.

Continuing from last time we will now look at the object buttons that we can use with our HMI panel. The button objects that are available on the C-More EA9 are Pushbuttons, Switches, Radio Buttons, Indicator Buttons, Step Switches, Tri-State Switches, and Key Buttons. Let’s get started. Continue Reading!

C-More EA9 HMI Series Panel Object List Shapes

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.

We can place several of these objects on one screen and have multiple panel screens. This helps you produce simple, intuitive looking human-machine interfaces.
We will be looking at our program we have so far developed (Simulate Project) and add shapes to a new screen page. These shapes can move and resize when interacting with the PLC. The navigation of the objects and additional information will also be discussed. Let’s get started. Continue Reading!

C-More EA9 HMI Series Panel Simulate Project

The C-More HMI Panel programming software has a simulation mode. This simulator will allow you to test your project before transferring it to a panel. Testing your application is a vital step in HMI program development. This feature of the software will save you time and money especially if your hardware is not available.
The simulator will display two windows. There is a graphical display of your HMI panel and a simulation control window. The control window will allow you to control variables in the project similar to a PLC.

We will be looking at our program developed last time (Common Screen Menu) and use the simulator to mimic how the PLC and HMI Panel will communicate in the field. This will help to detect any problems before we transfer to our panel. Let’s get started. Continue Reading!

Wiring a Capacitive Proximity NPN PNP Sensor to the Click PLC

A proximity sensor (switch) is able to detect object presence without physical contact like a limit switch. No physical contact means that the switch has no parts that will wear out. The life span of the sensor is increased with less maintenance.
A capacitive proximity sensor will detect ferrous and non-ferrous objects. The sensor works by oscillating the charge on the plates in the sensor. When an object is placed in front of the surface, the amount of current flow is detected. (Capacitance) The dielectric of objects will determine the distance that the object can be detected.

We will be wiring a capacitive proximity switch into the input of our Click PLC. The CK1-00-2H is an 18mm diameter, NPN/PNP N.O./N.C. selectable output with a 12mm sensing distance. That means that the sensor can be wired as positive (Sourcing) or negative (Sinking) switch. This unshielded 10 Hz switching frequency sensor also has a 4-pin M12 quick disconnect. Let’s get started. Continue Reading!

C-More EA9 HMI Series Panel Common Screen Menu

Allowing operators of your HMI (Human Machine Interface) panel to easily navigate all of the information available is a vital part of programming. We want to present the information to the operator so they will clearly understand the programmed operation of the unit. Common menus on the HMI panel pages will allow the quick navigation, understanding, and control that your operators want. When programming operator interfaces I have always heard to use the KISS method. (Keep It Stupidly Simple.) Your HMI program interface could contain hundreds of pages containing vital information for operator understanding and control, but you must make it easily accessible and intuitive. This is how you design and program a good HMI panel display.

We will be creating a common screen menu for our C-More EA9 HMI Panel using the C-More programming software. Using our previous program created we will be making a background screen to act as our menu system. Let’s get started. Continue Reading!

Wiring an Inductive Proximity NPN PNP Sensor to the Click PLC

A proximity sensor (switch) is able to detect object presence without physical contact like a limit switch. No physical contact means that the switch has no parts that will wear out. The life span of the sensor is increased with less maintenance.
An inductive proximity sensor will detect ferrous metals. The sensor develops an electric field when metal (sensing object) is introduced usually killing the oscillation circuit of the sensor triggering the output.

We will be wiring an inductive proximity switch into the input of our Click PLC. The AM1-A0-4A is an extended range 12mm tubular sensor that can be wired into the PLC as a sink or source input. Let’s get started. Continue Reading!

C-More EA9 HMI Series Panel to PLC and PLC to Panel Settings

The C-More EA9 HMI (Human Machine Interface) Series Panel will communicate to the PLC directly through the tag database that we discovered in our first program. We were able to read and write individual bits in the PLC.

Panel to PLC communications is used to write information into the PLC; like current screen number displayed, good communications, pop-up keyboard, and current language number used in the HMI.

PLC to Panel communications is used by the PLC to control the HMI. Switch to screen number, beep, increment and decrement the Clock by one hour, clear alarm history, clear alarm count, start screen saver and select language are the items you can control in the HMI.

PLC Error is used to communicate internally in the HMI the PLC error state and PLC error code value.
We will be setting up and testing our PLC to Panel and Panel to PLC communications on our EA9 C-More. Let’s get started. Continue Reading!

Wiring Push Buttons and Selector Switch to Click PLC

A push button (pushbutton) is a simple human interface for controlling some aspect of a machine or process. The push button requires a force to push the button to change the electrical operation from off to on or vice versa. The condition of the output is usually momentarily. Some common everyday pushbuttons we use are keyboards keys.

A selector switch is also a mechanical device that will require a force to turn the electrical operation from off to on or vice versa. The selector switch usually locks into a position.

We will be wiring two illuminated pushbutton switches into our Click PLC. A selector switch will also be wired in. Let’s get started. Continue Reading!