ModemGate

ION 7500 / ION 7600 User’s Guide

 

 

ModemGate

A gateway is a network point that acts as an entrance (or gate) to another network. Gateways enable communication between networks. This technical note describes how to use your ION meter’s internal modem as a ModemGate to collect data from serial networks.

The ModemGate feature creates a communications connection between the telephone network and a serial network (RS-232 or RS-485) of devices. When you specify the protocol for a meter’s COM port as MODEMGATE, all data received by the meter’s internal modem is automatically transferred to the serial network. You can only ModemGate out of one COM port on the meter.

Telephone

Network

MDM

Port protocol is set to MODEMGATE

COM1

RS-485 loop

NOTE

On ION 7330 and ION 7350 meters, the internal modem option is hardwired to COM1. If you are using ModemGate, then an ION 7330 or ION 7350 meter with an internal modem that will reside on the serial loop must connect to the serial loop using COM2. If COM1 is used, then the two modems (gated meter internal modem and serially looped meter internal modem) conflict during communication.

General network installation and basic setup:

1.Install the ION gateway meter with the internal modem and connect the internal modem to the telephone network.

2.Follow the instructions in your ION meter’s documentation to perform basic setup.

3.Wire the serial devices to the appropriate COM port on the meter and perform basic setup on each of these devices. After wiring and basic setup is complete, you must set up the software to reflect how you have wired the communications network.

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The ION Meter as a ModemGate Technical Note

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Multi-Tech Systems 7600, 7500 manual ModemGate, General network installation and basic setup
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7500, 7600 specifications

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