Siemens SIPROTEC 6MD665, Manual

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2.2 Command processing
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6MD665 Manual
C53000-G1876-C103-3
• Switch Authority LOCAL: A control command from the user interface of the device
(command with command source LOCAL) is only allowed if the Key Switch (for
devices without key switch via configuration) is set to LOCAL.
• DIGSI switching authority: Switching commands that are issued locally or remotely
via DIGSI (command with command source DIGSI) are only allowed if the Key
Switch (for devices without key switch via configuration) is set to REMOTE. If a
DIGSI-PC communicates with the device, it deposits here its virtual device number
(VD). DIGSI must have the same virtual device number (with REMOTE switching
authority). Switch commands of the remote control are rejected.
• REMOTE switching authority: A remote control command (command with initiator
source REMOTE) is only allowed if the Key Switch (for devices without key switch
via configuration) is set to REMOTE.
Figure 2-2 Standard interlocking arrangements
1) Initiator source REMOTE also includes LOCAL. (LOCAL command via the power system management in the sta-
tion, REMOTE command via telecontrol station to power system management and from power system management
to the device)
2) Release from testing of interlocking conditions
3) Not relevant for 6MD665
For devices with operator panel the display shows the configured interlocking reasons.
They are marked by letters explained in the following table.