Technical data

Troubleshooting
TeleService V6.1 Service Software for SIMATIC S7 and C7
13-6 A5E00921336-01
13.5 Modem Connection is Interrupted
Error: Possible cause: Check / Remedy:
Metering pulse in
the line
• If you have applied for a metering clock at the phone
company, metering pulses are generated. This may mean
that the modem no longer recognizes the carrier signal
and switches off.
• Set a longer waiting or disconnecting time at the modem.
• Have the metering pulse deactivated by the phone
company.
Shielding • Are the connection cables used shielded sufficiently?
• Make sure that the modem cables do not run next to
power cables and that they are at the greatest possible
distance from power supply units and monitors.
Protocol timeouts • Set fixed monitoring times.
Automatic
connection
disconnection
• Deactivate the option that disconnects an existing
connection automatically after a specified time without
data transfer ("Disconnect after no data transfer of ...").
- Useful Information on Setting Modem Properties
- Setting the TeleService-specific Modem Properties
Data flow control
deactivated
• Click on the "Extended" button in the "Settings" tab of the
modem properties and activate the following options in the
displayed dialog box (if offered and not yet set):
- Data flow control,
- Hardware (RTS/CTS),
- Data compression,
- Error control
Modem connection
is interrupted:
Initialization string of
the TS Adapters is
not suitable for the
modem
• Set the modem initialization string in accordance with the
following requirements:
- Properties of the Modem Initialization String for the
TS Adapter I/II
- Procedure for Configuring the TS Adapter IE