Siemens SIPROTEC 4 7SD80 Manual page 200

Functions
2.18 Breaker Control
The "Switching authority" object serves for interlocking or enabling LOCAL control but not REMOTE or DIGSI
commands. With a 7SD80, the switching authority can be changed between "REMOTE" and "LOCAL" on the
operator panel after having entered the password or by means of CFC also via binary inputs and a function
key.
The "Switching authority DIGSI" is used for interlocking and allows commands to be initiated using DIGSI.
Commands are allowed for both a remote and a local DIGSI connection. When a (local or remote) DIGSI PC
logs on to the device, it enters its Virtual Device Number (VD). The device only accepts commands having that
VD (with switching authority = OFF or REMOTE). When the DIGSI PC logs off, the VD is cancelled.
Commands are checked for their source SC and the device settings, and compared to the information set in
the objects "Switching authority" and "Switching authority DIGSI".
Configuration
Switching authority available
Switching authority available DIGSI
Specific device (e.g. switching device)
Specific device (e.g. switching device)
Table 2-15
Current Switching
Switching
Authority Status
LOCAL not
registered
LOCAL Checked
REMOTE Not checked
REMOTE Checked
1) also "Allowed" for: "switching authority LOCAL (check for Local status): is not marked
2) also "Allowed" for: "Switching authority REMOTE (check for LOCAL, REMOTE, or DIGSI status): is not marked"
3) SC = Source of command
SC = Auto SICAM:
Commands that are initiated internally (command processing in the CFC) are not subject to switching
authority and are therefore always "allowed".
Switching Mode
The switching mode determines whether selected interlocking conditions will be activated or deactivated at
the time of the switching operation.
The following switching modes (local) are defined:
•
Local commands (SC = LOCAL)
– interlocked (normal), or
– non-interlocked switching.
With a 7SD80, the switching mode can be changed between "locked" and "unlocked" on the operator panel
after having entered the password or by means of CFC also via binary inputs and a function key.
The following switching modes (remote) are defined:
200
Interlocking logic
Command Issued with
SC 3) =LOCAL
Allowed
Allowed
Interlocked 1) - "switching
authority REMOTE"
Interlocked 1) - "switching
authority DIGSI"
y/n (create appropriate object)
y/n (create appropriate object)
Switching authority LOCAL (check for Local status): y/n
Switching authority REMOTE (check for LOCAL, REMOTE, or
DIGSI commands: y/n
Command Issued from
SC=LOCAL or REMOTE
Interlocked 2) - "switching
authority LOCAL"
Interlocked 2) - "switching
authority LOCAL"
Allowed
Interlocked 2) - "switching
authority DIGSI"
Command issued from
SC=DIGSI
Interlocked "DIGSI not
registered"
Interlocked 2) - "switching
authority LOCAL" „verrie-
gelt, da VORORT–
Steuerung"
Interlocked "DIGSI not
registered"
Allowed
SIPROTEC 4, 7SD80, Manual
E50417-G1100-C474-A2, Edition 02.2018