Greetings everyone! I am currently working with a 1756-L72 ControlLogix controller and a MicroLogix 1500 PLC. My setup involves the ControlLogix accessing a register from the MicroLogix through a MSG (Message) instruction. Iām looking for an efficient method to transfer data from this register to a User-Defined Type (UDT) that encompasses various data types. Is there an effective approach to accomplish this without resorting to separate MOV or COP (Copy) instructions for each data parameter? Your insights would be greatly appreciated!
In a User-Defined Type (UDT), you cannot directly assign data from a MSG instruction to a sub-element. Instead, store the data in a tag or an array of the anticipated data type, such as Integer or Real. After that, use the MOV instruction to transfer the resulting value into the desired sub-element of the UDT. This approach ensures proper data handling and integration within your programming environment.
That's exactly what I suspected! I was searching for a more efficient method to help streamline and reduce some of my code.
ā Work Order Management
ā Asset Tracking
ā Preventive Maintenance
ā Inspection Report
We have received your information. We will share Schedule Demo details on your Mail Id.
Answer: A1: A User-Defined Type (UDT) in PLCs like ControlLogix and MicroLogix is a custom data structure that allows users to define a set of different data types under one umbrella. This enables more organized and efficient data management, especially when dealing with complex data sets, by grouping related variables together.
Answer: A2: Using a UDT can significantly simplify your code by reducing the number of instructions needed to handle multiple data types. Instead of writing separate MOV or COP instructions for each piece of data, you can manage them collectively within a UDT. This reduces programming errors, simplifies maintenance, and enhances clarity in your control logic.
Answer: A3: Yes, you can transfer data from an INT register to a UDT in ControlLogix, but it typically requires careful planning. You'll need to ensure that the UDT is configured to match the data structure you are transferring. While direct transfer might not always be possible for complex data,
Join hundreds of satisfied customers who have transformed their maintenance processes.
Sign up today and start optimizing your workflow.