2.36 Command Processing
225
7UM61 Manual
C53000-G1176-C127-3
Standard Interlock-
ing (fixed program-
ming)
The standard interlockings contain the following fixed programmed tests for each
switching device, which can be individually enabled or disabled using parameters:
• Device Status Check (set = actual): The switching command is rejected, and an
error indication is displayed if the circuit breaker is already in the set position. If this
check is enabled, then it works whether interlocking, e.g. zone controlled, is activat-
ed or deactivated.
• System Interlocking: To check system interlocking, a local command is transmitted
to the central unit with Switching Authority = LOCAL. A switching device that is
subject to system interlocking cannot be switched by DIGSI
®
.
• Zone Controlled / Bay Interlocking: Logic links in the device which were created via
CFC are interrogated and considered during interlocked switching.
• Blocked by Protection: A CLOSE-command is rejected as soon as one of the pro-
tective elements in the relay picks up. The OPEN-command, in contrast, can always
be executed. Please be aware, activation of thermal overload protection elements
or sensitive ground fault detection can create and maintain a fault condition status,
and can therefore block CLOSE commands. If the interlocking is removed, consider
that, on the other hand, the restart inhibit for motors will not automatically reject a
CLOSE command to the motor. Restarting would then have to be interlocked in
some other way. One method would be to use a specific interlocking in the CFC
logic.
• Double Operation Block: Parallel switching operations are interlocked against one
another; while one command is processed, a second one cannot be carried out.
• Switching Authority LOCAL: A switching command of the local control (command
with command source LOCAL) is only allowed if a LOCAL control is allowed at the
device (by configuration).
• Switching Authority DIGSI
®
: Switching commands that are issued locally or remote-
ly via DIGSI
®
(command with command source DIGSI
®
) is only allowed if REMOTE
control is admissible at the device (by configuration). If a DIGSI
®
PC connects to the
device, it deposits here its virtual device (VD) number. Only commands with this VD
(when Switching Authority = REMOTE) will be accepted by the device. Remote
switching commands will be rejected.
• Switching Authority REMOTE: A switching control command (command with
source of command REMOTE) is only allowed if REMOTE control is admissible at
the device (by configuration).
www . ElectricalPartManuals . com
To Next Page
Loading...
Need help?
General