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Transmission parameters can be set for four modes, as when setting the "Serial" and "Serial Line Redundant" lines.
Parameter "ConstOpen" is ignored - TCP connection is established the first time it is used.
Operation of the line in redundancy
In redundant systems (redundant D2000 servers and/or multiple instances of KOM processes), only the active KOM process connected to the D2000 Server in the HOT state opens a TCP connection. Once it becomes passive, the connection to the device closes.
Tell command LNSTAT
The tell command LNSTAT OPEN/CLOSE stops communication (CLOSE) and closes the connection to the device. Communication resumes after the LNSTAT OPEN command or when the communication process is restarted.
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