Multi-Tech Systems 7500 User Manual

ION 7500 / ION 7600 User’s Guide

Using WebMeter in a Modbus Network

WebMeter Internal Web Server Feature Technical Note

Page 279

Using WebMeter in a Modbus Network

Below is a typical application of the WebMeter feature.

Hardware

In this example, the ION 7500 meter is WebMeter enabled, and is acting as Modbus
master to the ION 6200 meter (acting as Modbus slave). The IP Address of the ION
7500 meter is 192.168.1.5 and it is also connected to the workstation PC via the
Ethernet.

The ION 6200 meter’s Unit ID is 113 and its location is the office. It is serially
connected to the ION 7500 meter using RS-485 cable.

Framework

The framework for the ION 7500 meter shows how the different modules are
configured to produce a custom web page for the ION 6200 meter.

Ethernet

RS-485

(Modbus network)

Unit ID: 113
Location: Office

IP Address: 192.168.1.5

Modbus Master Device

Modbus Slave Device

Factory Module

Device Namespace = Miami.CompanyX
Device Name = MainMeter

Web Page Module

Modbus Import

Module

Gatewayed Device Namespace = Default
Gatewayed Device Name = Office
Page Location = Office

Slave Addr = 113

Value 1

Value 2

Source 3

Source 2

Source 1

Value 3

XML web page

Http://192.168.1.5/Office.xml

<D...value=”Value 1”/>
<D...value=”Value 2”/>
<D...value=”Value 3”/>

</Data>

</Device>

Http://192.168.1.5/Office.html

HTML web page

Value 1
Value 2
Value 3

Label

Office