Subject: Assistance Needed for Modbus Communication with CompactLogix L32E Processor Hello everyone, I'm seeking your expertise to resolve an issue I'm experiencing with data retrieval. Specifically, I need to access data from a device that utilizes the Modbus communication protocol. My goal is to read this data using the CompactLogix L32E processor for use in various simulation applications within my programs. Could anyone guide me on how to accomplish this? Is it necessary to add a dedicated Modbus module to the Allen-Bradley CompactLogix PLC to facilitate data reading from other devices? Your assistance would be greatly appreciated! Thank you!
To proceed, kindly visit www.anybus.com and select either Modbus/TCP or Modbus RTU. You didn't specify which protocol you intend to use, so please clarify your choice.
The L32E features a DB9 connector that supports native RTU communication. However, utilizing a protocol converter may simplify the process, as recommended by Widelto. For more detailed insights, check out this informative article on Modbus support for CompactLogix models and watch this helpful video tutorial for additional guidance.
Nandraj inquired whether a dedicated Modbus module is required to enable the Allen-Bradley CompactLogix PLC to read data from external devices. To explore this further, visit the ProSoft website and search for the MVI69-MCM (Modbus Serial) and MVI69-MNET (Modbus over TCP/IP) modules. These options are designed as in-chassis solutions for seamless integration.
A highly effective solution for connecting with Modbus tags is the Red Lion DSPLE Module. This versatile protocol converter streamlines communication and enhances data integration. To learn more about this innovative tool, visit the official Red Lion website: [Red Lion DSPLE Protocol Converter](http://www.redlion.net/product/dsple-protocol-converter).
If you're looking to utilize Modbus RTU for simulation purposes, as you've indicated, I recommend exploring the AB sample code library. This resource includes various applications for writing Modbus. However, if your goal is to develop a comprehensive application for device control, it's advisable to consider third-party devices, as suggested by others in the community. On the other hand, if you're interested in Modbus TCP, it's important to note that the L32E controller does not natively support this protocol. In this case, you'll still require a third-party device to facilitate the connection.
Hey! You don’t necessarily need a dedicated Modbus module for the CompactLogix L32E, as you can use the Ethernet/IP protocol to communicate with Modbus devices, given that you have a suitable Ethernet connection. You might want to look into using a third-party software like RSLinx or even some open-source libraries that can handle Modbus TCP communication. Just make sure you set up your connections properly in the Ethernet settings and that the Modbus device's parameters match what you're expecting in your program. Good luck!
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