User Manual DEV 2190
32 Copyright DEV Systemtechnik GmbH 2009-2017
4.2.5 Reset of the Device and the Restore of Factory Defaults
During power-up or after a reset the CPU module performs a health check and
scans the assemblies of the device, e.g. to detect whether a module is installed in a
slot or not. If there is a module installed, the settings for this slot are transferred to
the module. This implies that a reset is necessary only if changes on the modules
population were performed (e.g. adding a replacement power supply module after
device operation without the defective power supply module); or if there were
applied elementary changes, e.g. restoring the factory defaults via Web Interface.
The reset of the device can be performed in three different ways:
1. Reset via the "Reset" push button of the CPU module:
press and hold (e.g. by using a ballpoint pen) the "Reset" button (please refer to
chapter 3.2.3) of the CPU module for approximately three seconds.
2. Reset via the serial interface when terminating the configuration program
(chapter 4.4.2.2.1).
3. Reset via Web Interface (chapter 5.4.7.4.3).
Note:
It takes about 60 seconds after a reset or after a power cycle that the device is
completely accessible again via serial interface, Web Interface, and via SNMP.
If the Web Interface does not react after a restart, then the ARP (Address Reso-
lution Protocol) cache of your computer may have to be cleared by opening a
command window and by typing: "arp –d<CR>" (<CR> stands for hitting the "Enter"
or "" key on the keyboard).
If –for any reason– neither a reset nor a power cycle of the device restores all
functionality, a reset to factory defaults is to be considered:
Usually, the factory settings (chapter 4.3) can be restored via Web Interface
(chapter 5.4.7.4.1). If –for any reason– the device is not accessible via Web
Interface, the factory settings can be applied in the following manner:
Press and hold the "Reset" push button of the CPU module e.g. by using a
ballpoint pen.
The yellow LED on the "Ethernet" connector of the CPU module starts to blink
after ~20…50 seconds, indicating that the "Reset" button can be released.
Now a reset follows resulting in a device with restored factory settings.
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