Command Logging; Description - Siemens siprotec SJ62 User Manual

2.25.5 Command Logging

Prerequisites

2.25.5.1 Description

Acknowledgement
of Commands to
the Device Front
Acknowledgement
of commands to
Local / Remote /
DIGSI
Monitoring of Feed-
back Information
Command Output
and Switching
Relays
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015
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.
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 4 System Description.
All messages with the source of command LOCAL are transformed into a correspond-
ing response and shown in the display of the device.
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 in-
formation recording.
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 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.
The command types needed for tripping and closing of the switchgear or for raising
and lowering of transformer taps are described in the configuration section of the
SIPROTEC 4 System Description /1/.
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2.25 Breaker Control
362