BRX Do-More Simple Modbus Serial Communication 

The newest version of the Do-More Designer Programming Software (2.9) includes a Modbus I/O Scanner. This will simplify Modbus RTU serial communications to any device. Communications are done independent of the PLC scan time and will have little or no ladder logic for the program.
We will be communicating to a Solo process temperature controller via Modbus RTU RS485. (twisted pair) Setting up the Modbus IO scanner, and reading the present value (PV) and set value (SV) of the Solo. We will also write the set value (SV) located within the BRX Do-More controller. This will all be done without using any ladder logic code. Let’s get started.
More information can be obtained on our website. This includes all of the links mentioned in this video.
accautomation.ca/brx-do-more-...
The entire BRX Series PLC can be found at the following location:
accautomation.ca/series/brx-d...
00:00 BRX Do-More Simple Modbus Serial Communication
01:18 Wiring BRX to Solo RS485
02:40 Solo Communication Parameters
04:28 BRX Do-More RS485 Setup / Parameters
06:50 BRX Modbus IO Scanner
13:19 Monitoring Serial Communication
Here are some of the individual posts with video links:
Installing the Software
accautomation.ca/brx-plc-inst...
• BRX Do-More PLC Instal...
Establishing Communication
accautomation.ca/brx-plc-esta...
• BRX Do-More PLC Establ...
Numbering Systems and Addressing
accautomation.ca/brx-plc-numb...
• BRX Do-More PLC Number...
First Program
accautomation.ca/brx-plc-firs...
• BRX Do-More PLC First ...
Monitoring and Testing the Program
accautomation.ca/brx-plc-moni...
• BRX Do-More PLC Monito...
Online Editing and Debug Mode
accautomation.ca/brx-plc-onli...
• BRX Do-More PLC Online...
Timers
accautomation.ca/brx-plc-timers
• BRX Do-More PLC Timers
Counters
accautomation.ca/brx-plc-coun...
• BRX Do-More PLC Counters
Math Instructions
accautomation.ca/brx-plc-math...
• BRX Do-More PLC Math I...
Program Control
accautomation.ca/brx-plc-prog...
• BRX Do-More PLC Contro...
Shifting Instructions
accautomation.ca/brx-plc-shif...
• BRX Do-More PLC Shifti...
Drum Instruction
accautomation.ca/brx-plc-drum...
• BRX Do-More PLC Drum I...
Data Logging
accautomation.ca/brx-plc-data...
• BRX Do-More PLC Data L...
Email - Text SMS Messaging Gmail
accautomation.ca/brx-plc-emai...
• BRX Do-More PLC Email ...
Secure Email Communication
• BRX PLC Secure Email C...
AdvancedHMI Communication - Modbus TCP
accautomation.ca/brx-plc-adva...
• BRX Do-More PLC Advanc...
HTTP JSON Instructions
accautomation.ca/brx-plc-http...
• BRX Do-More PLC HTTP J...
PID with PWM Output
accautomation.ca/brx-plc-pid-...
• BRX (Do-More) PLC PID ...
PID Ramp Soak Profile
accautomation.ca/brx-plc-pid-...
• BRX (Do-More) PLC PID ...
Modbus ASCII Protocol
accautomation.ca/brx-do-more-...
• BRX Do-More PLC Modbus...
HTTP Web Server
accautomation.ca/brx-do-more-...
• BRX Do-More PLC Web Se...
Dynamic Web Pages
accautomation.ca/brx-do-more-...
• BRX Do-More PLC Dynami...
BRX Do-More PLC FTP Client Get Put
accautomation.ca/brx-do-more-...
• BRX Do-More PLC FTP Cl...
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 their communication capabilities.
www.accautomation.ca