All posts by garrys

BRX Do-More PLC Using Modbus IO Scanner Profile


The Do-More Designer Programming Software (2.9) or higher includes a Modbus I/O Scanner with some profiles for Modbus Server (Slave) devices. This will greatly reduce the time it takes to implement and troubleshoot communications in your projects. Modbus communications are done independent of the PLC scan time and will have little or no ladder logic for the program.

Last time we communicated to a Solo process temperature controller via Modbus RTU RS485. (twisted pair) We manually set the Modbus IO scanner, reading the present value (PV) and set value (SV) of the Solo. The writing of the set value (SV) located within the BRX Do-More controller was also done. This was all be done without using any ladder logic code. We will now use the Modbus profile in the Modbus IO Scanner to connect a Click Plus PLC to our RS485 network. Using the Modbus scanner to write and read instructions we will also show how to use the ladder logic code with our scanner. Let’s get started. Continue Reading!

Productivity 2000 Series PLC CPU Display


The Productivity Series 2000 and 3000 CPUs and remote controllers have OLED/LCD displays. The data can be system errors and information or user-defined messages programmed through ladder logic. Operators, maintenance, or programmer can use this information for running conditions,  troubleshooting, or other items for the PLC system.
Productivity 2000 Series PLC CPU Display
We will be looking at the CPU OLED/LCD on the productivity 2000 PLC. The eight control buttons will display the inputs and output for troubleshooting. System parameters like the real-time clock can also be set using the CPU display and control buttons. Custom messages displayed will be programmed in ladder logic. This will include scrolling messages and displaying tag information. Let’s get started. Keep on Reading!

EasyPLC Simulator Robotic Cell Click PLC


The Machine Simulator (MS) is part of the EasyPLC software suite. It has many built-in machines that are used to show different programming techniques. The robotic cell example is one of these machines. This will demonstrate a sequencer example. In this case, an engine is lifted and placed onto a rack. The logic will step through various steps to perform the task.
EasyPLC Simulator Robotic Cell Click PLC
We will be using a Click PLUS PLC and the Click programming software to program this EasyPLC machine simulator engine loader of the robotic cell. This will be done using Modbus TCP (Ethernet) for communications. The program will allow you to start, stop and jog the sequencer. Using the five steps for program development, we will show how this sequencer is programmed. Let’s get started. Keep on Reading!

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 Modbus scanner 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.
BRX Do-More Simple Modbus Serial Communication
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. Communications will happen without using any ladder logic code. Let’s get started. Continue Reading!

Productivity 2000 Series PLC Program Documentation


Previously we created our first program using the Productivity Suite Software and transferred this to our connected Productivity 2000 Series PLC. One of the most important aspects of programming the PLC is to document. This will aid you and your team in programming, troubleshooting, and modifying the automation control system. Your documentation should read like a book so information can be quickly obtained when required. Time spent on the PLC documentation will be priceless when you go to read your program in 1, 3, or 10 years from now. The Productivity Suite software provides several different methods for documenting your PLC program.
Productivity 2000 Series PLC Program Documentation
Tag Names and Details, Task Names and Descriptions, Rung Comments and Instruction comments are the ways that we will be looking at documenting our PLC program. Let’s get started. Keep on Reading!

EasyPLC Simulator Productivity PLC Robotic Cell


The Machine Simulator (MS) is part of the EasyPLC software suite. It has many built-in machines that are used to show different programming techniques. The robotic cell example is one of these machines. This will demonstrate a sequencer example. The logic will step through different steps in order to perform the task. In this case, an engine is lifted and placed onto a rack.
EasyPLC Machine Simulator Productivity PLC Robotic Cell
We will be using a Productivity Suite Programming Simulator to program this engine loader of the robotic cell. This will be done using Modbus TCP (Ethernet) for communications. Using the five steps for program development we will show how this sequencer is programmed. Let’s get started. Keep on Reading!