Multi-Tech Systems 7500 Changing the Internal Modem Settings, Changing the Local Modem Settings

ION 7500 / ION 7600 User’s Guide Changing the Internal Modem Settings

Changing the Internal Modem Settings

To reconfigure the ION meter’s internal modem, access its setup register:

Using PEGASYS™ or ION Enterprise™:

In Designer, right-click the internal modem’s Comm module (inside the

Communications Setup group).

Using ION Setup™:

Double-click the Comm module icon for the meter’s internal modem. If you cannot see the module, right-click the meter icon. In the Device Properties dialog box, click the Tools tab, then select “Show Advanced ION Setup” in the Device Setup box. Click OK.

Changing the Local Modem Settings

Using PEGASYS or ION Setup

PEGASYS and ION Setup use the modem.ini file to define how the local modem should behave whenever modem communication is initiated. The modem.ini file contains information that sets the local modem to the specified baud rate and turns compression and error correction off. This particular setting is useful only if there are 3700 Series meters connected to the ION meter’s internal modem communications loop (through ModemGateTM). If only ION meters are used, we recommend that only the minimum required modem.ini settings be used (i.e. Q0 E0 V1 &K0).

Use a standard text editing software like Notepad™ to make changes to the modem.ini file.

Using ION Enterprise

ION Enterprise™ uses database queries to configure the local modem settings. Database queries are beyond the scope of this technical note. If you want to learn how to configure the local modem using ION Enterprise, please contact Power Measurement Technical Services.

Cellular Phone Compatibility

Using analog cellular phones to communicate with a meter equipped with a modem is not recommended due to the inherent unreliability of cellular phone communication. However, if cellular phone-to-meter communication is necessary, we recommend the following setup:

For compatibility with the (newer) Multi-Tech internal modem:

Local modem: Multi-Tech 5600ZDX or GVC 56K (also possible with other

Conexant chipset based modems)

Necessary AT commands: +MS=11,1,1200,4800\N2

Modem AT Commands Technical Note Page 289