Description
Acknowledgment of Commands to the Device Front
All messages with the source of command LOCAL are transformed into a corresponding response and shown
in the display of the device.
Acknowledgment of commands to Local / Remote / DIGSI
The acknowledgment 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 acknowledgment of commands is therefore not executed by a response indication as it is done with the
local command but by ordinary command and feedback information recording.
Monitoring of Feedback Information
The processing of commands monitors the command execution and timing of feedback information for all
commands. At the same time the command is sent, the monitoring 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.
Command Output and Switching Relays
The command types needed for tripping and closing of the switchgear or for raising and lowering of trans-
former taps are described in the configuration section of the SIPROTEC 4 System Description /1/ SIPROTEC 4
System Description.
2.27.5.1
Functions
2.27 Breaker Control
364 SIPROTEC 4, 7SJ62/64, Manual
C53000-G1140-C207-8, Edition 08.2016
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