4 Operating From a Personal Computer
Operation Guide Flatpack MCU,
351300.013, v8-2006-07
43
General
If connected directly to a PC, and the modem callback is enabled, the following message will be received in
WinPower Silver
«THE SYSTEM WILL CALL YOU BACK». Ignore this and enter CR a couple of times, and you
will then be asked for the password.
4.9.6.3 Modem
Installation and Configuration
Configuring the local modem
The local modem (on the PC side) can be almost any type of internal or external modem that is correctly installed
within the Windows operating system.
It is recommended that only true analog / hardware modems be used
.
Note: Certain internal 56k “soft modems” (such as Rockwell/Conexant and Lucent Win modems) do not work properly
with
WinPower Silver
(these low-cost embedded laptop modems use the PC processor to effect functions that are
handled by separate DSP circuits in a “true” modem). Use of these modems is not recommended. Use of these modems
to receive automatic and periodic alarm reports from the MCU is possible; however, callback will not function when
attempting to operate
WinPower Silver
remotely through the modem dialup link.
To install the modem, open 'My Computer', select the 'Control Panel' and double click the 'Modem' icon. Follow the
steps to install your modem. After installation has completed, select ‘Properties’ and set the baud rate to 9600.
In the ‘Advanced’ menu of the ‘Properties’ -setup, the user can add extra initialization commands. If the modem has
problems initializing calls (because of internal lines etc.), ATX3 or ATX0 can be added in this field to change the
modem response code handling. Other ATX variations may be necessary to permit the correct response codes,
depending on specific modem types and line/connection conditions.
The modem cable is a normal “straight through” cable, with all pins connected.
Configuring the remote modem
Eltek Energy offers for sale with our DC power systems appropriate modems for use with the MCU controller.
Depending on system configuration and locality, two basic options are available (as of this writing); the Westermo TD-
32B DIN rail mounted modem, and the Western Telematic FTM-336 19” rack mounted modem. Both of these modems
are DC-powered and operate from the power system bus.
It is important that the modem on the alarm module side is configured to let the DCD line follow the state of the carrier,
usually by the AT command “AT&C1”.
The Westermo AT command string is the default and is as shown in section 4.9.6:
AT&F&D0&Q5&K0&C1S0=1
In order to use the Western Telematic modem, use the following AT command string:
AT&F&D&Q5&K$MB9600$SB9600S37=9S0=1
Note that the strings “9600” should coincide with the baud rate set in
WinPower Silver
and configured at the MCU.