B&B Electronics GW-7472 - Manual - Manual (Page 5)

GW-7472 User Manual, Version 1.0, Dec 2010 --- 5
1. Introduction
The GW-7472 (EtherNet/IP adapter to Modbus RTU Master Gateway) is helpful for data-
exchanging between the Modbus RTU network and the EtherNet/IP network. It reads the
register data from the Modbus RTU slaves and publishes these data to the input register data of
the EtherNet/IP scanner. The output data transmitted by the EtherNet/IP scanner are updated to
the register data of Modbus RTU slaves via the GW-7472. Through the GW-7472, all of the
Modbus slaves can be regard as one EtherNet/IP adapter. The GW-7472 allows maximum 6
connections for the Explicit Messages and 1 connection for the Implicit Messages at the same
time. It means that 7 EtherNet/IP scanners can connect to one GW-7472 at the same time.
The Modbus RTU master functions of the GW-7472 can scan up to 30 Modbus RTU
commands. After configuring the Modbus RTU master behavior of the GW-7472 and the
mapping status between the Modbus RTU registers and EtherNet/IP registers by using the GW-
7472 Utility tool, the input/output registers of the Modbus RTU slaves are mapping to the
output/input registers of the EtherNet/IP adapter. While booting up, the GW-7472 scans the pre-
defined register addresses in all of the Modbus RTU slaves according to the sequence defined
in the utility tool. The input and output register data of the Modbus devices are updated as soon
as the GW-7472 could.
In order to save the installation space, the GW-7472 is offered in an amazing tiny form-
factor that makes it easy to install in anywhere, even directly attached to a serial device or
embedded into a machine. The GW-7472 features a powerful 32-bit MCU to handle efficient
network traffic and it provides the IEEE 802.3af-compliant (classification, Class 1) Power over
Ethernet (PoE) with a standard category 5 Ethernet cable. Through the NS-205PSE, Poe switch,
the GW-7472 can be powered via the Ethernet cable. When there is no PoE switch on site, the
GW-7472 provide another way to be powered from DC adapters. These two power interfaces
are redundant. If one fails, another will take it over to supply the proper power to the GW-7472.