Siemens 7SJ82, Руководство пользователя

Страница: 167 / 1638

Persistent Commands
In addition to the switching commands, which are issued as pulse commands, and stored for the standard
switching devices (circuit breaker, disconnector switch), persistent commands are also possible. In this case, a
distinction must be drawn between controllables with the Continuous output operating mode and a stored
signal output that is immune to reset.
You can change a controllable from pulse to persistent command with the
Command output
parameter.
[scbefehl-260912-01.tif, 1, en_US]
Figure 3-88 Setting the Command Type in DIGSI 5
Select
Pulse output
or
Continuous output
for the command output type. If a persistent command is
selected, the Pulse parameter is irrelevant.
Device Logoff
Overview
In the case of multibay functions, a device uses information from one or more other devices. For some applica-
tions, it may be necessary for you to remove a device with all effective functions temporarily from the plant
and even to switch it off. These applications are, for example:
•
Maintenance work
•
System upgrades
•
Testing the local protection functions
The
Device logoff
functionality informs the receiver devices about the imminent disconnection of the
transmitter devices. To do this, the last valid received information is stored in the receiver devices and used for
the multibay functions.
3.8.3
3.8.4
3.8.4.1
System Functions
3.8 Other Functions
SIPROTEC 5, Overcurrent Protection, Manual 167
C53000-G5040-C017-8, Edition 07.2017