Command Logging; Description - Siemens SIPROTEC 4 7SJ61 Manual

Functions
2.18 Breaker Control
Device Status Check (set = actual)
For switching commands, a check takes place whether the selected switching device is already in the set/
desired position (set/actual comparison). This means, if a circuit breaker is already in the CLOSED position and
an attempt is made to issue a closing command, the command will be refused, with the operating message
"set condition equals actual condition". If the circuit breaker / switchgear device is in the intermediate position,
then this check is not performed.
Bypassing Interlockings
Bypassing configured interlockings at the time of the switching action happens device-internal via interlocking
recognition in the command job or globally via so-called switching modes.
•
SC=LOCAL
– The 7SJ61 allows the switching modes "interlocked" or "non-interlocked" to be selected in the oper-
ator panel after password entry.
•
REMOTE and DIGSI
– Commands issued by SICAM or DIGSI are unlocked via a global switching mode REMOTE. A separate
request must be sent for the unlocking. The unlocking applies only for one switching operation and
for commands caused by the same source.
– Job order: command to object "Switching mode REMOTE", ON
– Job order: switching command to "switching device"
•
Command via CFC (automatic command, SC=Auto SICAM):
– Behavior configured in the CFC block ("BOOL to command").

Command Logging

2.18.5
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 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.
2.18.5.1

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.
228 SIPROTEC 4, 7SJ61, Manual
C53000-G1140-C210-6, Edition 05.2016