User Manual

Technical Manual for Master Terminals of the Series IF 152x
Page 32
Test
The controller software of the master terminal contains a test program (OC task) which can be
operated via service interface per dialog station or via network connection with TELNET. The following
can serve as a dialog station:
• PC with RS 232 interface service cable and terminal emulation program. Detailed information on
the connection and the settings can be found in the chapter "Service PC Connection".
• PC within a network and TELNET.
In order to reach the command level of the program, the master terminal must be ready for operation
and the dialog station must be connected to the service interface. A host connection via network
requires a network connection via TELNET (port number 23). The invocation of the program is
protected by a password. The program can only be operated if the password entered corresponds to
the password saved.
The program is ready for input when the „$“ symbol or the login appears on screen. This can take up
to 20 seconds after a RESET or after the mains voltage has been switched on. During normal
operation, an entry is usually possible once the Enter key has been pressed.
$ Please Note: If the input readiness is not indicated after the Enter key has been pressed, please
check the connection and the interface parameters of the dialog station and then switch the operating
voltage of the master terminal off and back on again.
Enter $ oc to retrieve an overview of the current program menus. Enter menu -? (example: $ oc -?) to
retrieve further information on the respective menu.
How to Check the Checksum of the Controller Software
The controller software is protected by a CRC checksum. The 2 byte CRC is automatically created
and stored in the C-RAM after the controller software has been loaded. After a RESET or a cold boot,
the program automatically checks this CRC character. In case of an incorrect CRC, the start-up
procedure will be terminated and the boot routine will be activated.
Check the CRC by means of the OC menu $ checkappl
if the master terminal does not start working
after a RESET or a cold boot. A correct checksum will be acknowledged with Good Application CRC,
an incorrect checksum with Bad Application CRC. In case of an incorrect checksum, the application
software must be reloaded. In some cases, e.g. voltage loss of the C-RAM, it is sufficient to determine
the checksum with $ checkappl -x
.
How to Check the Network Connection
The following menus of the test program are used specifically for checking the network connection
and for reading network-specific settings of an Ethernet/token ring controller.
• ping
(see next chapter)
• netpar -?
?= Options
• netpar Display the Ethernet node number and the internet address
• ifconfig nat0
Display the network addresses and network-specific data
• netstat - ?
Options:
• - n= Active internet connection
• - s= Statistics
• - r= Display the routing tables
• bw
Display the TCP processes and errors (only when connected)
$ Note: Check the connection to and from local systems first. Local connections within a network must
be working before inter network connections can be set up.