BRX Do-More PLC Modbus ASCII Protocol

We will now look at the do more plc modbus ascii protocol communication. This will be done through PLC ladder logic sending ASCII characters out the serial port.
More information can be obtained on our website. This includes all of the links mentioned in this video.
https://accautomation.ca/brx-do-more-...

Modbus is a communication method used for transmitting information over serial lines between electronic devices. The device requesting the information is called the Modbus Master (Client) and the devices supplying information are Modbus Slaves (Servers). This protocol was originally developed by Modicon systems.
Modbus protocol comes in basically three different types. Ethernet (Modbus TCP) or Serial (Modbus RTU or Modbus ASCII). Modbus TCP and Modbus RTU come as standard protocols in the BRX Do-More series of PLCs.
We will connect the BRX Do-More PLC to a Solo process temperature controller. This will be done using the Modbus ASCII protocol over serial RS485 communication wire. (Media) The present and set values (PV / SV) will be read from the Solo controller and the set value will be written when required. Let's get started.

The entire BRX Series PLC can be found at the following location:
https://accautomation.ca/series/brx-d...
Here are some of the individual posts with video links:
Installing the Software
https://accautomation.ca/brx-plc-inst...
   • BRX Do-More PLC Installing the Software  
Establishing Communication
https://accautomation.ca/brx-plc-esta...
   • BRX Do-More PLC Establishing Communic...  
Numbering Systems and Addressing
https://accautomation.ca/brx-plc-numb...
   • BRX Do-More PLC Numbering Systems and...  
First Program
https://accautomation.ca/brx-plc-firs...
   • BRX Do-More PLC First Program  
Online Editing and Debug Mode
https://accautomation.ca/brx-plc-onli...
   • BRX Do-More PLC Online Editing and De...  
Timers
https://accautomation.ca/brx-plc-timers
   • BRX Do-More PLC Timers  
Serial Communication – Modbus RTU to Solo Process Temperature Controller
https://accautomation.ca/brx-plc-seri...
   • BRX Do-More PLC Serial Communication ...  
Data Logging
https://accautomation.ca/brx-plc-data...
   • BRX Do-More PLC Data Logging  
Email – Text SMS Messaging Gmail
https://accautomation.ca/brx-plc-emai...
   • BRX Do-More PLC Email – Text SMS Mess...  
Secure Email Communication
   • BRX PLC Secure Email Communication  
AdvancedHMI Communication – Modbus TCP
https://accautomation.ca/brx-plc-adva...
   • BRX Do-More PLC AdvancedHMI – Modbus TCP  
PID with PWM Output
https://accautomation.ca/brx-plc-pid-...
   • BRX (Do-More) PLC PID with PWM Output  
PID Ramp Soak Profile
https://accautomation.ca/brx-plc-pid-...
   • BRX (Do-More) PLC PID Ramp Soak Profile  
BRX Do-More Simulator MQTT Publish-Subscribe
https://accautomation.ca/brx-do-more-...
   • BRX Do-More Simulator MQTT Publish Su...  
BRX Do-More PLC MQTT Communications
https://accautomation.ca/brx-do-more-...
   • BRX Do-More PLC MQTT Communications  
BRX Do-More PLC to Stride Field IO Modbus TCP
https://accautomation.ca/brx-do-more-...
   • BRX Do-More PLC to Stride Modbus TCP ...  
BRX Do-More PLC Ethernet Remote IO Controller BX-DMIO
https://accautomation.ca/brx-do-more-...
Modbus RTU TCP Remote IO Controller BX-MBIO
https://accautomation.ca/modbus-rtu-t...
BRX Do-More PLC to Modbus TCP RTU Remote IO Controller BX-MBIO
https://accautomation.ca/brx-do-more-...
   • BRX Do-More PLC to Modbus Remote IO C...  

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 the 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