Logoff of a Device from a Device Combination with Communication via the IEC 61850-8-1 (GOOSE) Protocol
If devices are exchanging data via the IEC 61850-8-1 (GOOSE) protocol, for example, in the case of substation
interlocking, you can set in the receiver device for each received data point the value of this data point when
the transmitter device logs off. This value remains effective in the receiver device until the logoff is canceled
by the transmitter device, even if the transmitter and/or the receiver are switched off in the meantime.
Logoff of a Device from a Device Combination using Protection Communication
If devices in a device combination communicate via the protection interface, you can only log off a device
under the following conditions:
•
Logging off and switching off a device in a device combination must not result in an interruption of the
protection communication.
•
For series-connected topologies, the device must be located at one end of the communication chain as
otherwise, the protection communication is interrupted when the device is logged off and switched off.
For this reason, devices that are not at one of the ends in series-connected topologies cannot be logged
off.
Logoff via Binary Inputs
The following diagrams show potential variants on how to control binary inputs. If you want to use push-
buttons, switch them on as shown in the following figure. Use the push-button Key2 to log off the device; use
the push-button Key1 log on the device again.
[loextta logoff device, 1, en_US]
Figure 3-90
External Push-Button Wiring for Logging off the Device
If a switch is being used for control, route the binary input
>Device funct.logoff on
as
H (active
with voltage)
and the binary input
>Dev. funct.logoff off
as
L (active without voltage)
.
If the switch S is closed, the device is logged off.
[loextsx logoff device, 1, en_US]
Figure 3-91
External Switch Wiring for Logging off the Device
Indications
The logged-off device reports the status (
(_:315) Device logged off
) and the cause of the logoff.
If you have logged off the device via binary inputs, the indication
(_:313) Logged off via BI
is issued.
If you have logged off the device via on-site operation, via DIGSI 5, or via the protection interface, the indica-
tion
(_:314) Logged off via control
is issued.
The indications are stored in the operational log.
System Functions
3.8 Other Functions
152
SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017
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