Siemens SIPROTEC 7UM62 Manual page 356

Functions
2.50 Command Processing
Enabling Logic via CFC
For bay interlocking, an enable logic can be created using CFC. Via specific release conditions the information
„released" or „bay interlocked" are available, e.g. object „52 Close" and „52 Open" with the data values: ON /
OFF).
Switching Authority
The interlocking condition "Switching Authority" serves to determine the switching authorization. It enables the
user to select the authorized switching source. The following switching authority zones are defined in consec-
utive priority sequence:
• LOCAL
• DIGSI
• REMOTE
The DIGSI object "Switching authority" serves to interlock or enable LOCAL control, but not remote or DIGSI
commands. For the 7UM621 and 7UM622 the switching authority can be changed between "REMOTE" and
"LOCAL" in the operator panel by password or by means of CFC also via binary input and function key. For the
7UM623 the switching authority can be changed by means of the keyswitch.
The object "Switching authority DIGSI" is used for interlocking and enabling of 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 2-22 Interlocking logic
Current switching Switching authority DIGSI
authority status
LOCAL Not logged on
LOCAL Logged on
REMOTE Not logged on
REMOTE Logged on
1)
also "Enabled" for: "Switching authority LOCAL (check for Local status): n"
2)
also "Enabled" for: "Switching authority REMOTE (check for LOCAL, REMOTE, or DIGSI status): n"
3)
SC = Source of command
356
y/n (create appropriate object)
y/n (create appropriate object)
Switching authority LOCAL (check for Local sta-
tus): y/n
Switching authority REMOTE (check for LOCAL,
REMOTE, or DIGSI status): y/n
Command with Command issued from
SC=LOCAL or REMOTE
3)
SC = DIGSI
Enabled Interlocked
because of LOCAL control"
Enabled Interlocked
because of LOCAL control"
1)
Interlocked "inter- Enabled
locked because of
REMOTE control"
1)
Interlocked "inter- Interlocked
locked because of because of DIGSI control"
DIGSI control"
Command issued
from SC=DIGSI
2)
"interlocked Interlocked "DIGSI
not registered"
2)
"interlocked Interlocked
locked because of
LOCAL control"
Interlocked "DIGSI
not registered"
2)
"interlocked Enabled
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
2)
"inter-