Command Logging; Description - Siemens 7SC80 Manual

Functions
2.27 Breaker Control

Command Logging

2.27.5
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 center. These messages
contain information on the cause. With the corresponding allocation (configuration) these messages are
entered in the event list, thus serving as a report.
Prerequisites
A list of possible operating responses and their meaning as well as the command types required for tripping
and closing of switching devices or for raising and lowering transformer taps are described in the SIPROTEC 4
System Description.
2.27.5.1

Description

Acknowledgment of Commands to the Device Front
All indications with the source of command LOCAL are transformed into a corresponding response and shown
in the text field of the Web Monitor.
Acknowledgment of Commands to LOCAL/REMOTE/DIGSI
The acknowledgment of indications with source of command LOCAL/REMOTE/DIGSI are sent back to the
initiating point independent of the routing (configuration on the interface).
The acknowledgment of commands is thus not effected via a response as in the case of a local command but
via the normal command and feedback logging.
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
System Description.
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SIPROTEC Compact, 7SC80, Manual
E50417-G1140-C486-A8, Edition 07.2017