REXROTH VT-VRPD-2 Start-Up And Operation page 54

RE 30126-01-B/08.07 | Manual
Use Modem to Connect
Modem Port
Timeout
Phone Number to Dial
Modem Initialization Commands
Configuration of the modems
Select the radio button "Use Modem to Connect" if you want to connect with the PC to
the VT-VRPD remotely using a modem connection.
With the "Modeml Port" entry field the user specifies which serial port of the PC is
used to communicate with the controller card using a modem connection.
The "Timeout" field is the delay for "Cable break" detection by BODAC. This value
should be at least 1500 ms.
The "Phone Number to Dial" field is used to enter the phone number of the remote
modem.
AT commands are stringssent to the modem connected to the PC to configure it
before dialing. There is a basic command set, the Hayes Command Set, that most
modems have implemented (For more information refer to
http://en.wikipedia.org/wiki/Hayes_command_set
For specific information regarding commands that are used in your modem please
refer to the modem manufacturer documentation. At a minimum the modem codes
should be set to numeric(ATV0) and the results codes should be set to 0(ATX0).
Opens a file with previously saved Modem Initialization Commands
Saves the Modem Initialization Commands listed in the window.
Fig. 33 Modem configuration
In order to communicate successfully both the local and remote modems need to be
configurated. The VRPD communicates at a defined baud rate; therefore the modem
connected to the VRPD must be configured to communicate at the VRPD baud
rate.Setting of the baud rate that matches the VT- VRPD baud rate can be achieved
using dipswitches or AT commands depending on the modem being used (For details
regarding setting of the modem baud rate please refer to the modem documentation)
Local Modem connection:
With an external modem a standard serial cable is used. The local modem must be
set to return numeric results (Hayes Command ATV0) and basic results codes (Hayes
Command ATX0). Depending on the modem used this can either be accomplished
through dip switches on the modem or through the use of Hayes Commands.
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BODAC – Menu Description 5
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