Hello everyone, I would like to know what kind of product I must use, with the minimum of knowledge to communicate with a product in rs485 other tcp/ip. The protocol on tcp/ip must be Modbus TCP. Is there a product that doing that automatically ?

 

There are many products that will do this, but you must be specific about which protocol you are using on the RS-485 side (for example, Modbus RTU or BACnet MS/TP etc.)

Our company makes a gateway called the ETH-1000 that communicates via a variety of RS-485 and Ethernet protocols. There are similar products available from other companies as well.

http://iccdesigns.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=ICC&Product_Code=eth1000

Darrin

 

I usually use OPC for this kind of communication. It's a quick and easy way to get my data:

http://www.matrikonopc.com/opc-drivers/opc-modbus/base-driver-details.aspx

Cheers,
Wassim Daoud
Global Solutions Architect

 

What you would need is a Modbus RTU/TCP gateway. There are plenty of
offerings around.

We for example have an easy-to-use Modbus TCP-to-RTU gateway MODG-100 which works well for the scenario that the Master is the TCP device and the Slave the RS-485 device.
Follow this link: http://www.proconx.com/modg100/

If you want it the other way round, you can use our MBRG-300 Modbus router which can operate in any direction.
Follow this link: http://www.proconx.com/mbrg300/

Henrik
www.proconX.com

Depending which device is the master

 

Hi there,

There are two types of gateways, transparent ones and non-transparent.
The transparent gateways requires minimum of configuration, only to configure baudrate parity etc. When this gateway receives a Modbus TCP command, it will convert to Modbus RTU and send it to the Modbus RTU slave. This means that the Modbus TCP master has to include correct Modbus RTU slave Id in the Modbus TCP command and also handle timing and resending of commands, when needed.

The non-transparent gateways needs more configuring, since they need a list of Modbus RTU commands. With this type of gateway one can offload the Modbus TCP master, since the gateway will handle timing functions and will handle resending of commands. Usually the Modbus TCP and Modbus RTU interface of the gateway, share a memory area and the two networks are separated and can be run independently.

Transparent gateway:
http://www.anybus.com/support/support.asp?PID=237&ProdType=Anybus X-gateway

Non-transparent gateway:
http://www.anybus.com/support/support.asp?PID=110&ProductType=Anybus Communicator

Good luck with your project.

Patrick Lansdorf

 

For what you're trying to do, I recommend the DIGI ONE IAP:

http://www.digi.com/products/serialservers/digioneiap.jsp#overview

I've used this device many times, always with success.

Hope this helps!

 

Hello,

my company does also produce easy to use gateways.

Here is a main overview about the different Gateway solutions we offer:
http://hilscher.com/products_group_gateways_nettap.html

To see the different protocol combinations (RS485 to Modbus) please follow this link:
http://hilscher.com/products_list_group.html?upg=15&pg=22

Feel free to ask any question on this.

Regards
AJ