Enhance Modicon M340 with Compatible Remote IO Solution for Seamless Integration

31-08-2024
grnick50
13 comments
8231
97

Question:

Greetings! I am currently utilizing a Modicon M340 system equipped with built-in Modbus and Ethernet functionalities. I am interested in expanding the system with remote IOs. Unfortunately, Schneider's Advantys OTB and STB options are not suitable due to various reasons. It is important to note that the onboard ethernet port does not support IO scanning. To incorporate remote IOs with the M340, one option is to add an additional ethernet module (such as NOE) that supports IO scanning. Alternatively, there may be a method to achieve this using the existing onboard ethernet capabilities. I am seeking recommendations for a remote IO solution that is compatible with ethernet (specifically Modbus TCP/IP) for seamless integration with the M340. While I have not previously worked with Wago, I have heard they offer suitable remote IOs. Could you kindly suggest a specific part number for the interface to aid in my search? Thank you in advance for any guidance you can provide.

Top Replies

Unlock the potential of B&R's X20 IO with the ModbusTCP bus controller for seamless integration and control. Easily program the bus controller using the complimentary FieldbusDESIGNER software, available for download on their website. This setup allows you to access coils and registers with a Modbus TCP Master (client) at a cost-effective price point. For a more rugged solution, consider B&R's machine mount IP67 IO system, which eliminates the need for a panel. While this option may come at a higher price compared to the X20, its durability and performance make it a worthwhile investment.

01-09-2024
CapinWinky

Although it appears intriguing, it seems that BR lacks a supplier in Greece.

01-09-2024
grnick50

For innovative automation solutions in Limassol, Cyprus, turn to N.G. Pavlides Automations Ltd. Located at 5 Andreas Panayides Str., this leading company can be contacted at +357 / 99451265 or through email at [email protected] Visit their website at www.ngp-control.com for more information on their services.

02-09-2024
CapinWinky

Yes, I am aware that Cyprus is a separate country from Greece. It is located far away, making it challenging to provide support.

03-09-2024
grnick50

If you are considering using read_var / write_var function blocks with the processor port, I would advise against it. While it is technically possible, the time spent programming and debugging these blocks outweighs any potential benefits. In my experience, using IOScanner is a much faster and more efficient option. Here are some alternatives to consider: 1. Utilize read_var/write_var blocks with the processor port, although this may require a significant amount of time for programming and debugging. 2. Install a NOE module and utilize the IOScanner service for seamless communication with ModbusTCP slaves. 3. Install a NOC module for flexibility in utilizing scanner services for ModbusTCP or EtherNet/IP Class 1 communications, or both simultaneously. 4. If your processor supports CANOpen, consider using CANOpen IO modules. Personally, I prefer option (3) as it offers versatility in handling different protocols and is considered the future-proof choice by Schneider. When it comes to IO, I tend to avoid the OTB series from Schneider due to personal preference, despite their good performance. I find other vendors' IO devices to be easier to work with. For third-party vendors in the network IO space, there are numerous options to explore, including Rockwell EtherNet/IP IO, Wago, Phoenix Contact, Turck, Advantech, Sixnet (Redlion), Acromag, Beckhoff, Moxa, and more. Each brand has its own strengths and advantages, so it's important to research and find the best fit for your specific needs.

04-09-2024
robertkjonesjr

Hello! Wago does have a range of remote IO modules compatible with Modbus TCP/IP. A good recommendation would be the Wago 750-352 Ethernet Fieldbus; it supports Modbus TCP/IP and provides a flexible platform for various IO modules. However, remember to check the compatibility of any specific IO requirements you have with this controller. The Wago e!Cockpit software might also be a useful tool to help with the integration. Equally important is to verify your M340 PLC's firmware compatibility with this Wago part to avoid compatibility issues.

10-01-2025
Samuel Lee

Hey there! For remote IO solutions with the Modicon M340 over Modbus TCP/IP, you might want to consider Wago's 750-352 Ethernet coupler. It works well with their I/O modules and is known for reliable performance in similar setups. The flexibility of Wago’s system allows you to mix and match various I/O modules, which might help meet your specific requirements. I've had good experiences with their products in the past, so they could be worth a try! Good luck with your project!

01-03-2025
Jennifer Phillips

More Replies →

Have you explored the PRA module yet? Once you do, you can utilize standard M340 IO in the remote racks, with each remote rack being equipped with its own PRA module.

05-09-2024
chud

Wow, you're a shining star! I just realized that this product exists, it's similar to the ET200M-PN. Regards.

05-09-2024
grnick50

Does the Pra module design cater to PLCs such as M580, Momentum, and Quantum, but not the M340?

05-09-2024
AUTOlearner

When comparing the use of an NOE vs. an NOC, there doesn't seem to be a clear advantage to using one over the other. Implementing Ethernet remote I/O for the M340 can be challenging if you want to mirror the same BMX I/O modules remotely as you have locally on the processor. I have experience using the PRA with M340, and I find it to be a unique product. It functions more like a reduced size Ethernet CPU rather than a true remote I/O adaptor. While the NOC or NOE can perform I/O scanning to the PRA, code needs to be inserted into the PRA to map the data to its I/O. Essentially, the PRA operates like a smaller-sized M340 processor, requiring a separate program file and code development to manage communications failures and shut down the I/O on the remote end if needed. In contrast, utilizing Advantys STB Modbus TCP remote I/O has always yielded positive outcomes for me. By using default addressing for the modules and setting the IP with the role-name dhcp, the remote drop becomes easily configurable by electricians without the need for Advantys software. This flexibility has proven to be efficient and cost-effective in numerous instances. In terms of remote device configuration, Ethernet/IP setup on an NOC module may initially present challenges compared to Rockwell. However, with some time and effort, the results can be highly effective. My personal preference leans towards using Ethernet/IP with an NOC module over the PRA, as it offers a smoother learning curve and reliable performance. Ultimately, a practical approach is to choose a solution that streamlines the installation process and minimizes the need for constant adjustments.

05-09-2024
Corsair

Corsair mentioned that there seems to be no advantage in using an NOE over an NOC in terms of Ethernet remote I/O for the M340. It can be challenging to have the same BMX I/O modules remotely as you do locally on the processor. When working with the PRA on the M340, it becomes apparent that it is not a typical remote I/O adaptor but rather a smaller Ethernet CPU that requires its own program development, similar to the M340 Ethernet CPU. While the NOC or NOE can handle I/O scanning to the PRA, custom code needs to be implemented to map the data to its I/O. The PRA essentially functions as a scaled-down M340 processor, necessitating programming on both sides to manage communication issues and shut down remote I/O if needed. While some flexibility is offered for logic solutions at the remote end, the main advantage of the PRA is cost-effectiveness, despite potentially increasing spare parts inventory. On the other hand, utilizing Advantys STB Modbus TCP remote I/O has yielded positive outcomes in many instances. Default addressing for the modules and role-name dhcp simplifies IP configuration, allowing electricians to make changes effortlessly without Advantys configuration software. Despite Schneider's recommendation to use their software for configuration, practical experience on numerous islands supports the efficiency and ease of using Advantys for remote I/O setups. The goal is to have a system where electricians can easily replace parts, set address switches, and commence operations without expert intervention, a task efficiently achieved by Advantys. Regarding Ethernet/IP setup on an NOC module, initial configuration may seem cumbersome compared to Rockwell. However, with some learning, impressive outcomes can be achieved. With a diverse mix of Schneider and AB CPUs, coupled with motor control from various manufacturers, Ethernet/IP has proven to be reliable and effective in fulfilling its promises. In conclusion, it is advisable to forego the PRA and opt for Ethernet/IP with an NOC module. Be prepared for a reasonable learning curve in the process.

05-09-2024
AUTOlearner

According to AUTOlearner, the Pra module design is not only for PLCs like M580, Momentum, and Quantum, but can also be used with M340. Despite the outdated information, I have successfully used the PRA module with M340 in the past. Looking back, I would now recommend using a Noe (Modbus TCP/IP IO scanning) or a Noc (Ethernet IP) with remote IO from various suppliers. In my experience, I found Weidmuller's products to be the most user-friendly and easy to install.

05-09-2024
chud

Corsair reported successful use of Advantys STB Modbus TCP remote I/O modules, noting that default addressing and the "dhcp" role name have worked well for loading the IP. This allows for easy remote updates by electricians, including changing the NIP without the need for Advantys configuration software. While Modbus can be calculated manually, using software is the more preferred method due to its convenience and efficiency.

05-09-2024
Lare

There is no harm in utilizing software to locate the modbus. However, I prefer not to use it for configuring the system since it would then require the software for any changes to be made.

05-09-2024
Corsair

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Frequently Asked Questions (FAQ)

FAQ: 1. What are some compatible remote IO solutions for enhancing a Modicon M340 system with Ethernet capabilities?

Answer: Answer: Some compatible remote IO solutions for seamless integration with Modicon M340 include Wago remote IOs that support Modbus TCP/IP.

FAQ: 2. How can I incorporate remote IOs with a Modicon M340 system that has limited onboard ethernet capabilities?

Answer: Answer: One option is to add an additional ethernet module (e.g., NOE) that supports IO scanning, or explore methods to utilize the existing onboard ethernet capabilities for remote IO integration.

FAQ: 3. Are there alternative options to Schneider's Advantys OTB and STB for expanding a Modicon M340 system with remote IOs?

Answer: Answer: Yes, there are alternative solutions available, such as Wago remote IOs, that can be compatible with Modicon M340 systems for enhanced integration.

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