Mitsubishi DRVA Instruction Programming Example The DRVA instruction of Mitsubishi PLC (taking the FX series as an example) is used for absolute positioning control, which specifies the target position based on the origin for single-speed positioning actions. The instruction format is: DRVA S1 S2 D1 D2, where: S1: Target position (absolute address, in pulse counts, … Read more
1. Classification System of Function Instructions (FX3U Series) 1. Program Flow Control Instruction Function Typical Application Scenarios CJ Conditional Jump Device mode switching (manual/automatic) CALL Subroutine Call Repeated execution of robotic arm actions FOR/NEXT Loop Instruction Batch data processing (e.g., 100 samples) WDT Watchdog Timer Prevent program deadlock 2. Data Transfer Instruction Function Typical Application … Read more
A knowledge blind spot in Mitsubishi PLCs is the reading backup of file registers R and ZR. It becomes quite simple once you know it, but if you don’t, it can be quite perplexing. A customer created a new device, but with over a hundred models, they wanted to import all parameters from the old … Read more
1. Motor Control Case 5. Electric Motor Y-△ Reduced Voltage Start Control Requirements The electric motor should first start with a Y connection for reduced voltage, and after a delay, switch to a △ connection for full voltage operation. Main Instructions Used LD, OR, ANI, OUT, TMR Control Logic · At startup, the main contactor … Read more
Detailed Analysis of Mitsubishi PLC Traffic Light Control Program Statement List (STL) Format – Two Programming Methods for Automatic Control of Intersection Traffic Lights 1. System Overview This article uses the Mitsubishi PLC Statement List (STL) format to write a traffic light control program for intersections, providing two different implementation methods. The system controls the … Read more
When we finish writing a program, we often need to debug or modify it, or later add new features. At this time, we need to keep track of what changes were made, so that if the current program encounters a bug, we can revert to the previous version of the program. This requires the login … Read more
1. Mitsubishi’s PLC Modbus TCP master station function is generally implemented through programming, requiring the use of “communication protocol support function“ 1)In the object device connection configuration settings, add “Active connection device” and select “communication protocol“. You need to fill in the local port number, the other party’s IP and the other party’s port number. … Read more
![Learn New Knowledge! Detailed Explanation of Mitsubishi PLC [Rotary Table Control] Functionality.](https://boardor.com/wp-content/uploads/2025/11/81613f4e-83aa-45a2-9dc8-27198a32526a.jpg)
I accidentally came across this instruction, and today we will discuss a convenient instruction “ROTC” in the Mitsubishi FX3U PLC. Its function is: for our rotary table equipment, the number of divisions can be set, and among them, one or two positions can be processed. We can intelligently determine the fastest rotation direction through this … Read more
As shown in the figure: pitch 5mm, motor resolution 1000, reduction ratio 5. The requirement is to position 100mm and then return to the origin. How should the program be written? Analysis: To position 100mm, how many pulses are needed? Positioning distance = pulse count * movement per pulse Movement per pulse = 5/1000/5 = … Read more
MitsubishiQSeriesPLCAnalog Output Module for Controlling Inverters Implementing0-50Hz precise speed control solutions Application Overview In industrial automation control systems, using the MitsubishiQSeriesPLCanalog output module to control inverters is a common application scenario. By controlling the inverter output frequency with analog signals (0-10V or 4-20mA), stepless speed regulation of motors can be achieved to meet various process … Read more