Web Client Access to Modbus TCP Server Data

A simple way to exchange Modbus TCP Server Registers and Coil data with your web applications





Easily Access Registers and Coils in Modbus
There are millions of Modbus measuring, metering and analyzing devices in industrial and building automation applications. Now, with the 460MCWI, you have an easy way to exchange Modbus TCP Server register and coil data with your web applications. Use that data to easily build an Excel log, a dashboard, archive data or create a sophisticated alarm system. The 460MCWI gets you the data – you just have to make use of it.

How Do I get Modbus Server Data?
First, you configure the 460MCWI using the easy to use, browser-based configuration pages. You’ll identify the address of the Modbus Servers to access and the registers and coils from each you want to read/write. Once that’s complete, you’ll map, name and group the data to be presented as XML or JSON files. Your application can than issue standard HTTP GET or POST instructions to move data into your application. It’s that easy.

How Is the Data Represented?
In your GET you can request either a JSON or XML data. In XML, you’ll get something like <Speed105>523<Speed105>. In JSON, you’ll get “Speed105:523” for the same register. Individual devices and groups can be identified to further organize your data.

What Web Client Applications Can I Use?
You can access the JSON or XML tags from any web application tool including Python, PSP and other similar tools.

Why Use Real Time Automation as a Gateway Supplier?
When you call, a live person answers the phone. When you talk with sales, you will get honest answers and recommendations. When you get support, it is from an engineer who had a hand in the product’s development, and support doesn’t require a ticket or 24-hour wait. Try the RTA difference today.

Web Interface Features

Max Web Interface Connections: 1 (Gateway acting as Client) / Unlimited (Gateway acting as Server)
Encodings: JSON, XML
Proxy Support: HTTP, SOCKS5 for Client
Maximum Number of Input Data Points: 1000 JSON Fields or 1000 XML Tags
Maximum Number of Output Data Points: 1000 JSON Fields or 1000 XML Tags
HTTP Services: Client: POST only; Server: GET and POST

Modbus TCP/IP Client Features

Modbus Operation Modes: Modbus TCP/IP Client
Function Codes Supported: 1, 2, 3, 4, 5, 6, 15 and 16
Swapping: Byte and Word Swapping
Maximum Modbus TCP/IP Server Devices: 32
Number Read/Write Scan Lines per Server Device: 200 Total - 100 reads & 100 writes
Scan Line Support: Up to 125 Registers or 512 Coils

What our Customers are Saying

“I challenged a customer to get it working by the time I got back from his break room with a Coke and he indeed had it working when I got back. He then said, "It’s worth twice the price!"”

Eric P. / Kendall Electric

“Everything seems to be working as we imagined. Thanks for the great response time. I did not see any way to save the configuration other than screen shots, but the configuration did not get lost in the update. Thanks again, and you were a pleasure to work with.”

Kevin L. / Extol, Inc.