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2.36.5 Command Logging/Acknowledgement
During the processing of the commands, independent of the further message routing
and processing, command and process feedback information are sent to the message
processing centre. These messages contain information on the cause. With the cor-
responding allocation (configuration) these messages are entered in the event list,
thus serving as a report.
Prerequisites
A listing of possible operating messages and their meaning as well as the command
types needed for tripping and closing of the switchgear or for raising and lowering of
transformer taps are described in the SIPROTEC
2.36.5.1 Description
Acknowledgement
All messages with the source of command LOCAL are transformed into a correspond-
of Commands to
ing response and shown in the display of the device.
the Device Front
Acknowledgement
The acknowledgement of messages with source of command Local/ Remote/DIGSI
of Commands to
are sent back to the initiating point independent of the routing (configuration on the
Local / Remote /
serial digital interface).
Digsi
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 in-
formation recording.
Monitoring of Feed-
The processing of commands monitors the command execution and timing of feed-
back Information
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 in-
formation, 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.
Command Output
The command types needed for tripping and closing of the switchgear or for raising
and Switching
and lowering of transformer taps are described under configuration in /1/.
Relays
7UM61 Manual
C53000-G1176-C127-3
2.36 Command Processing
®
4 System Description.
231
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