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FP Web-Server V2.11
9.1 Dial-up Networking Setup for Computer/ FP Web-Server
119
The modem must be set up to support RTS/CTS flow control.
Using the FP Modem-EU for PPP communication is recommended. Its factory default setup can
be used and it only needs to be connected via a 1:1 cable to the FP Web-Server.
RTS/CTS flow control needs to be enabled with AT&K3. To connect the modem to the FP
Web-Server, refer to PPP-Server with modem (see page
163).
Standard modem:
Standard computer modems should be reset to the factory default state with the command
AT&F&W. If there are connection problems, disabling the autoanswer mode with ATS0=0 or the
Keybreak function with AT%K1 helps with some modems.
GSM modem:
• Be careful with the GSM antenna! Maintain distance to the other units (PLC, modem, FP
Web-Server...), as it may cause interference by high level radio waves.
• Please reboot (power up) the FP Web-Server after changing cables and connectors.
Especially after connecting a modem / GSM module to the FP Web-Server, it is
necessary to restart the unit for modem initialization and recognition.
Further information:
ISDN Adapter (see page
136)
9.1.4 FP Web-Server PPP Gateway Functions
The PPP-Server can be called up via modem by a PPP-Client, e.g. laptop with dial-up
networking functions (see "
Modem and Dial-up Networking Installation of a Windows Client" on
page
111). As soon as the connection is established, you cannot only access the PLC and the
FP Web-Server functions of the PPP-Server with this distant PPP-Client, but also contact all the
other FP Web-Servers in the network via Ethernet!
The Ethernet (LAN) network and the dial-up networking connection have to be regarded as two
separate networks, each with its own network address! For notes on IP addressing and
distinguishing the network's and the unit's address, refer to IP and TCP/ IP (see page
166).
Within the LAN there is only one PPP-Server gateway allowed, i.e. if several FP Web-Servers
are connected in a network via the Ethernet, only one of the FP Web-Servers in this network can
assume the function of a PPP-Server.
When the IP configuration of the FP Web-Server is carried out, you can specify a default LAN
gateway. As soon as a modem connection with the PPP-Server is established, this gateway
address is replaced by the PPP configuration.
Configuration for an Initial Test:
All FP Web-Servers in the Ethernet network need to have entered the gateway address of that
FP Web-Server that implemented the PPP-Server access.