Siemens SIPROTEC 6MD665, Manual

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2 Functions
28
6MD665 Manual
C53000-G1876-C103-3
2.2.4.1 Description
Acknowledgement
of Commands to
the Device Front All messages with the source of command LOCAL are transformed into a correspond-
ing response and shown in the display of the device.
Acknowledgement
of commands to
Local/Remote/Digsi The acknowledgement of messages with source of command Local/ Remote/DIGSI
are sent back to the initiating point independent of the routing (configuration on the
serial digital interface).
The acknowledgement of commands is therefore not executed by a response indica-
tion as it is done with the local command but by ordinary command and feedback infor-
mation recording.
Monitoring of feed-
back information The processing of commands monitors the command execution and timing of feed-
back information for all commands. At the same time the command is sent, the moni-
toring time is started (monitoring of the command execution). This time controls
whether the device achieves the required final result within the monitoring time. The
monitoring time is stopped as soon as the feedback information arrives. If no feedback
information arrives, a response "Timeout command monitoring time" appears and the
process is terminated.
Commands and information feedback are also recorded in the event list. Normally the
execution of a command is terminated as soon as the feedback information (FB+) of
the relevant switchgear arrives or, in case of commands without process feedback
information, the command output resets and a message is output.
The "plus" sign appearing in a feedback information confirms that the command was
successful. The command was as expected, in other words positive. The "minus" is a
negative confirmation and means that the command was not executed as expected.