Dedicated Line Operation; Dial-Up Phone Line Operation - Siemens SIMATIC TI555 System Manual

Dedicated Line
Operation
Dial-up Phone Line
Operation
TI545/TI555 System Manual
Use these procedures to establish communication between modems in a
dedicated line configuration.
1. Connect the modem configuration.
2. Ensure that the CPU controller and modem baud rates are set to the
same value.
NOTE: If the modems are auto-bauding, ensure that the controller baud rate
is set within the baud rate range of the modems.
3. Power up the modems and verify that they are connected—usually by
an indicator on the modems.
4. Execute TISOFT; TISOFT auto-bauds to the system's baud rate (CPU
and modem).
Use these procedures to establish communication between modems in a
dial-up phone line configuration.
1. Connect the modem configuration.
2. Ensure that the CPU controller and modem baud rates are set to the
same value.
3. Depending on the type of modems being used, the following are three
ways to establish communication between the modems.
Manually call from one modem station to the other modem station
and then switch on both modems.
Manually call from one modem station to an auto-answer modem
at the other station.
Use TIDIAL dialing software installed with TISOFT Release 5.0 to
call an auto-answer modem at the PLC modem station.
4. Execute TISOFT; TISOFT auto-bauds to the system's baud rate (CPU
and modems).
Cabling and Wiring the System
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