I am working on a project in Studio 5000 where a tag generates a three-digit code. I want to implement a logic that associates specific messages to codes, so that a message can be displayed on the HMI screen based on the code produced. For example, codes 101 to 110 each have a corresponding message. I am seeking advice on the most efficient approach to achieve this. The module produces a tag with a value of 100, which the logic interprets as "ready". Similarly, a tag value of 101 triggers the message "check door 1", and so forth. The HMI will display the appropriate message based on the tag value, such as 100, 101, 102, etc. Your insights on the best way to manage this process would be greatly appreciated. Thank you.
It appears to be a multi-state indicator based on your explanation. Simply place the object on the HMI, input the values, and specify the desired display for each value.
Which HMI model should I choose? Each model offers a unique selection of screen objects for this purpose.
There are various methods available for displaying messages in your system. One option is the Multi State Indicator, as recommended by Okie. Another option is the Local Message Display, and the third option is the Information Message Display. All three methods are effective, with the main difference being where you want the message to appear. If you only need the message to display on a specific page, then the Multi State Indicator is the best choice. Simply add the object to your display, specify the number of states and input your information in the Caption. Connect the tag in the connection tab to generate a 3-digit code and set the values of each state to your 3-digit code to display the Caption data. The Local Message Display functions similarly to the Multi State Indicator, utilizing a message file to determine which information to show. The tag value corresponds to the message in the file, and it is also a single object placed on a specific page. The Information Screen operates similarly to the Local Message Display, requiring a message file but with the distinction that it will appear on any screen when the tag value is not zero. Once the tag value returns to zero, the information screen will disappear.
In your scenario, I'd suggest using an Array and an Indirect Addressing approach. Build an array where each element corresponds to a code, and its value is the message text to be displayed. The code then serves as the index to this array. So when the code changes, the appropriate element in the array is accessed and shown on the HMI. This will allow you to easily edit or add new messages/codes in the future and keeps your logic straightforward and lean. You simply need to make sure that any adjustments within your range (101-110) are adequately accounted for. Be mindful though, indirect addressing might add some level of complexity, especially when debugging. I hope this helps you out and good luck with your project!
What you want to accomplish could be achieved using an array of UDTs (User-Defined Types). In this approach, you'd create a UDT with two elements: one for the code (INT or DINT) and another for the message (STRING). Then create an array of this UDT, where each element corresponds to a specific code-message pair. In your HMI, you'd just need to make a lookup logic to display the appropriate message based on the tag value. This consolidates your code-message relationships all in one place making it simpler and efficient to maintain.
From the sound of it, creating an array or a lookup table could be the most efficient answer to your problem. Your table could contain message strings as elements, indexed by the code minus a base number (100 in your case). When the PLC updates the tag value, a script on the HMI could look up the corresponding message in the array and display it. This way, changes are flexible, and adding more codes won't be a problem; you need only add entries to the lookup table. Of course, keep in mind the capabilities of your HMI; not all may allow such constructs directly, but Studio 5000 should be advanced enough to handle it.
There are a few ways you could approach this in Studio 5000. One method I've found particularly effective is using an array of strings for the messages and then use the tag value as an index to select the correct message. This approach is quite efficient because it avoids the need for a long series of if-else statements or case structures. For instance, let's assume you have an array: messages[110], then messages[100] will correspond to "ready", messages[101] to "check door 1", etc. You might need to subtract 100 from your tag value before using it as an index, as arrays typically start at 0. This way, the logic in your PLC and HMI remains simple and easy to manage.
It sounds like a great project! To efficiently manage the association between your three-digit codes and the corresponding messages in Studio 5000, you might consider using an array or a structured data type. You can create a data array where the index corresponds to the code (e.g., 100 to 110), and each element holds the respective message string. When the tag generates a code, simply use that code as an index to fetch and display the correct message on the HMI. This will keep your logic clean and allow for easy updates or additions to the message list in the future. Good luck!
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Answer: - To associate specific messages to codes in Studio 5000, you can create a logic that maps each code to its corresponding message. This logic can interpret the tag values and trigger the display of the appropriate message on the HMI screen.
Answer: - The most efficient approach to implementing message logic in Studio 5000 is to use a structured method where each code is linked to a specific message. This allows for easy management and display of messages based on the tag values generated by the system.
Answer: - You can achieve this by setting up conditional statements or a mapping system in the logic of Studio 5000. By associating each code with a specific message, the system can dynamically display the appropriate message on the HMI screen corresponding to the tag value received.
Answer: - Sure! You can create a structured list or array where each index corresponds to a code and holds the associated message. Then, based on the tag value received, you can retrieve the message from the list and display it on the HMI screen
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