Chapter 2. CPU Features & Specifications
GFK-2222AD
April 2018
97
Ethernet Restart Pushbutton
The Ethernet Restart pushbutton is used to manually restart the Ethernet firmware without power
cycling the entire control system. It is recessed to prevent accidental operation. The restart does not
occur until the pushbutton is released.
The type of restart behavior is selected by the length of time that the pushbutton is depressed. The
pushbutton-controlled restart operations are listed in the following table, along with the LED indications
for each. In all cases, the EOK, LAN and STAT LEDs briefly turn on in unison as an LED test. The Ethernet
port LEDs are not affected by a manual restart of the Ethernet firmware.
Restart Operation
Depress Ethernet Restart
pushbutton for
Ethernet LEDs
Illuminated
Normal restart
Less than 5 seconds
EOK, LAN, STAT
Restart without Ethernet plug-in
applications
5 to 10 seconds
LAN, STAT
Restart into Firmware Update operation More than 10 seconds
STAT
Normal Restart
When the Ethernet Restart pushbutton is pressed for less than 5 seconds, the Ethernet interface will
restart into normal operation.
Restart without Ethernet Plug-in Applications
When the Restart pushbutton is pressed and held for 5 to 10 seconds, the Ethernet interface will restart
into normal operation but does not start any optional Ethernet plug-in applications. This is typically done
during troubleshooting.
Restart into Firmware Update Operation
When the Ethernet Restart pushbutton is pressed and held for more than 10 seconds, the Ethernet
interface will restart into firmware update operation. This is typically done during troubleshooting to
bypass possibly invalid firmware and allow valid firmware to be loaded using WinLoader.
Until the firmware update actually begins, you can manually exit the firmware update and restart with
the existing firmware by pressing the Ethernet Restart pushbutton again.