User Manual DEV 1951
Copyright DEV Systemtechnik GmbH 2004-2017 35
5 Operation of the Product
After going through the installation steps as described above, the device is ready to
use. There are different options for monitoring and control, please refer to chapter
3.1.2. Before the operation via each of these possibilities is explained, the different
device operation modes are described:
5.1 Modes of Operation
Local Mode, Remote Mode, and Auto Mode define the manner how the device is
controlled. In addition, Individual switching mode and Simultaneous switching
mode define the switching behavior of the device.
The operation mode can be changed via the mode (or "Local") push button at the
device panel (please refer to chapter 3.1.1), via Web Interface (chapter 5.5.2), via
SNMP (chapter 5.9.4.3.1), and via Sandar Prosan protocol (restricted to the change
between Remote Mode and Auto Mode and vice versa (chapter 5.6.3.6)).
Note:
The factory setting for the operation mode is Remote Mode.
Changing the switching mode (chapter 5.1.4) is possible only if the DEV 1951 is
equipped with two switch modules.
In Local Mode the switching mode can be altered via the switching mode push
button at the device panel (labeled 6 in the figure of chapter 3.1.1) or via Web
Interface (chapter 5.5.4.1). In Remote Mode, the switching mode can be changed
via Sandar Prosan protocol (chapter 5.6.3.7) and via SNMP (chapter 5.9.4.3.3).
5.1.1 Local Mode
In Local Mode the device executes commands which are issued via push button
actions at the device panel or (also in parallel) via Web Interface.
The digital interface is disabled in Local Mode as well as the functionality of the
different remote protocols (SNMP, Sandar Prosan, Leitch, and QEC) to issue
switching commands and to modify the settings of the device. However, the
communication to the remote interfaces either is enabled or is capable to be
enabled (keyword "Echo in Local Mode", please refer to chapters 5.6.1 & 5.7.1) for
status queries.
No autonomous switching is performed in Local Mode if the DEV 1951 is equipped
with sensing switch modules (and/or digital signal switch modules). Neither Time
Based Switching nor TRAC initiated switching is performed in Local Mode, as well.
Note:
For products with the preceding version of the device panel providing a "Local"
push button (instead of the mode push button) and a single "Remote" LED
(instead of the three operation mode LEDs), only: The "Remote" LED at the
device panel being off indicates that the device is in Local Mode.
5.1.2 Remote Mode
The Remote Mode is implemented for operation via the digital interface, via SNMP,
via Sandar Prosan protocol, via Leitch protocol, or via QEC protocol.
In Remote Mode, the status of the DEV 1951 is indicated via the LEDs at the device
panel and via Web Interface, but the buttons at the device panel are locked and the
control functionality of the Web Interface is disabled.
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