User manual
IEC61131 User and Reference Manual 
April 22, 2008     
118 
Handshake Authentication Protocol (CHAP). PAP and CHAP usernames and passwords are 
configured on the PPP Login page. 
The Inactivity Timeout is the inactivity timeout for this serial port. If there has been no 
activity on an existing PPP connection for the selected number of minutes, then the 
connection is automatically closed. If there is a modem connected it is hung up. Setting this 
value to zero disables the timeout. 
com2 Port 
The com2 Port property page is selected for editing by clicking com2 Port in the tree control 
section of the IP Configuration dialog. When selected the com2 Port property page is active. 
This page configures the IP settings for com2 when the PPP protocol is selected for this 
serial port. 
The com2 Port property page provides the same options as the com1 Port page. See the 
com1 Port page for a description of these options.  
com3 Port 
The com3 Port property page is selected for editing by clicking com3 Port in the tree control 
section of the IP Configuration dialog. When selected the com3 Port property page is active. 
This page configures the IP settings for com3 when the PPP protocol is selected for this 
serial port. 
The com3 Port property page provides the same options as the com1 Port page. See the 
com1 Port page for a description of these options.  
com4 Port 
The com4 Port property page is selected for editing by clicking com4 Port in the tree control 
section of the IP Configuration dialog. When selected the com4 Port property page is active. 
This page configures the IP settings for com4 when the PPP protocol is selected for this 
serial port. 
The com4 Port property page provides the same options as the com1 Port page. See the 
com1 Port page for a description of these options.  
PPP Login 
The PPP Login property page is selected for editing by clicking PPP Login in the tree control 
section of the IP Configuration dialog. When selected the PPP Login property page is active. 
This page configures the username and password list for PPP login authentication. The list 
is used only by those serial ports configured for the PPP protocol using PAP or CHAP 
authentication. 










