BRX Do-More PLC Compare Instructions
We will now look at the compare instructions in the BRX Do-More controller. Compare instruction is often used in PLC programs to test pairs of values. The output of this comparison conditions the logical continuity of a rung. The BRX series of programmable logic controllers have the following compare contact instructions.
= (if Equal contact)
<> (if Not Equal contact)
> (if Greater Than contact)
>= (if Greater Than or Equal contact)
< (if Less Than contact)
<= (if Less Than or Equal contact)
Besides these instructions, the BRX Do-More PLC will also have compare instructions for the built-in real-time clock of the system. We will be looking at these instructions along with some programming examples. As a system integrator, this ability can prove very useful to you in the field when commissioning your automation system.
Let's get started with the BRX PLC Compare Instructions.
More information can be obtained at our website. This includes all of the links mentioned in this video.
https://accautomation.ca/brx-plc-comp...
Previously in this BRX Do-More Series PLC, we looked at the following:
System Hardware
https://accautomation.ca/brx-plc-syst...
System Hardware Video
• BRX Do-More PLC System Hardware
Unboxing Video
• BRX Do-More Series PLC Unboxing
Installing the Software
https://accautomation.ca/brx-plc-inst...
Installing the Software Video
• BRX Do-More PLC Installing the Software
Establishing Communication
https://accautomation.ca/brx-plc-esta...
Establishing Communication Video
• BRX Do-More PLC Establishing Communic...
Updating Firmware Video
• BRX Do-More PLC Updating Firmware
Numbering Systems and Addressing
https://accautomation.ca/brx-plc-numb...
Numbering Systems and Addressing Video
• BRX Do-More PLC Numbering Systems and...
First Program
https://accautomation.ca/brx-plc-firs...
First Program Video
• BRX Do-More PLC First Program
Monitoring and Testing the Program
https://accautomation.ca/brx-plc-moni...
Monitoring and Testing the Program Video
• BRX Do-More PLC Monitoring and Testin...
Online Editing and Debug Mode
https://accautomation.ca/brx-plc-onli...
Online Editing and Debug Mode Video
• BRX Do-More PLC Online Editing and De...
Timers
https://accautomation.ca/brx-plc-timers
Timers Video
• BRX Do-More PLC Timers
Counters
https://accautomation.ca/brx-plc-coun...
Counters Video
• BRX Do-More PLC Counters
High-Speed IO
https://accautomation.ca/brx-plc-high...
High-Speed IO Video
• BRX Do-More PLC High Speed IO
There are several reasons why we are using the BRX Series Controller. Here are just a few.
- Standalone PLC with built-in I/O
- Built-in Data Logging
- Communication ability - Ethernet Port, RS232, RS485, USB - support for protocols such as Modbus RTU, Modbus TCP, ASCII, K-sequence (DirectLOGIC users), Custom Protocols (ASCII over serial, TCP or UDP over Ethernet)
- Built-in Analog input and output
- Integrated motion control
- High-speed counters
- Powerful instruction set (Video of Instructions in software)
- Ability to expand the system with a variety of modules
- Part of the Do-More series of PLCs which use the same free software. (Do-More Designer)
- Integrated simulator in the software capable of external communications for testing
The BRX series of programmable logic controllers consist of four different units. They differ depending on the Inputs and Outputs built into the unit and if it has an ethernet port.
No I/O Micro PLC unit – (BX ME)
10 Point Micro PLC unit – (BX 10/10E)
18 Point Micro PLC unit - (BX 18/18E)
36 Point Micro PLC unit - (BX 36/36E)
These CPUs (Central Processing Units) are also known as MPU (Multi-Processing Units) because of the communication capabilities.
https://www.accautomation.ca