BRX PLC Monitoring and Testing the Program

Our first program for the BRX PLC involved a start stop jog circuit. We will now use the Do-More Designer Software to monitor, test and modify this program. As a system integrator, this ability can prove very useful to you in the field when troubleshooting your automation system.
We will be monitoring the ladder logic status and bits. Changing the bit status will be done by forcing the inputs and outputs.
Here is a link explaining the logic behind our circuit.
How to Make a Start Stop Jog Circuit in a PLC
Let’s get started. Continue Reading!

BRX PLC First Program

We will now look at writing our first program for the BRX PLC. The Do-More Series allows us to write programs online or offline with the PLC controller. The series will also allow us to do online editing. We can change program information and download the new program between scans of our controller. As a system integrator, this ability can prove very useful to you in the field when troubleshooting your automation system.
Our first program will be the start, stop, jog circuit. Here is a link explaining the logic behind the circuit.
How to Make a Start Stop Jog Circuit in a PLC
Let’s get started. Continue Reading!

Modbus RTU Click PLC Master to BRX PLC Slave Communication

Recently I was asked to demonstrate communication between a Click PLC and BRX PLC using Modbus RTU. Both PLCs are available from automation direct com. Modbus serial communication (Modbus RTU) is a standard protocol used in many automation devices. It works on a Master / Slave configuration. You can have only one master per network on Modbus RTU (Remote Terminal Unit). A maximum of 32 devices (Nodes) on the network can communicate to the master. A review of the Modbus RTU protocol (RTU frames) can be seen at the following URL.
http://www.rtaautomation.com/technologies/modbus-rtu/
Using the Click PLC as a Master we will be communicating to the BRX PLC (Slave). Our example will read 10 registers from the BRX PLC and write 10 registers to the Click PLC. Let’s get started! Keep on Reading!

Sharing a Database in SQL Server Express 2014

Microsoft SQL Server Express 2014 is a free, edition of SQL Server this is ideal for learning and developing desktop, web and small server applications. The database size can be 10 gigabytes in size. SQL Server Express 2014 release includes the full version of SQL Server 2014 Management Studio. We will be using SQL Server 2014 to share the database on a network. The SQL Server database is ideal for applications such as data acquisition (data logging) from our PLC applications. We need to configure the SQL Server database so other computers can access this on the LAN (Local Area Network). Continue Reading!