Values of communication lines

An object of Line type can acquire the following values in the D2000 system:

Object valueDescription
TrueThe line is working.
FalseThe line is not working.

Note: Solving line failure problems depends on the line category. Each line generates the output file called line_name.log placed in the trace subdirectory of the application directory. The file contains detailed information about the error.

The definition of working of the line depends on its category:

Line categoryFunctioning line

The LonWorks dynamic library (ldv32.dll) was initialized and the specialized LON device could be opened.

MOXA IP Serial Library

The Moxa dynamic library (Ipserial.dll) was initialized, a connection to the specified Moxa devices was established and specified serial port parameters were set.

RFC2217 Client

A TCP connection with the RFC2217 server was established and possibly the parameters of the serial port were queried.

Serial Line Redundant
System&Line Redundant

The serial port was open and the required serial port parameters were set.

SerialOverUDP Device Redundant
SerialOverUDP Line Redundant
SerialOverUDP System&Line Redundant

Binding to the specified local UDP port(s) was successful.

TCP/IP-TCP Redundant

TCP/IP-TCP System Redundant

A TCP connection was established (client protocols), resp. binding to the specified local TCP port(s) was successful (server protocols).


Binding to the specified local UDP port was successful.


Object value of category Communication lines can have also flags (user attributes) set. Currently, they are implemented for the following combinations of line categories and communication protocols:

Related pages:

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