Section 3; Operation; Power-Up - Siemens VIU-20 Installation And Instruction

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3.0

OPERATION

3.1

POWER-UP

When the VIU is first powered up, it performs various vital and non-vital software checks. During
this period (approximately 1 minute, 10 seconds), only the power LED is lit while the display
shows the following:
Following the software checks the display turns on and the VIU loads various drivers (USB,
Ethernet, etc.) before running the VIU executive (MEF). At approximately 1 minute, 30 seconds
from power-up, the VIU lights all front panel LEDs to test for bad LEDs. At approximately 2
minutes from power-up, the VIU settles into normal operation, the input status LEDs show
current input status and the health LED flashes at 0.5 Hz.
SIG-00-07-11
Version No.: B.2

SECTION 3

OPERATION
RAILROADS OR
ENSURING ONLY PROPERLY TRAINED AND/OR AUTHORIZED
PERSONNEL HAVE ACCESS TO THE VIU-20.
PROGRAM CHANGES MUST BE PERFORMED IN ACCORDANCE
WITH RAILROAD PROCEDURES.
VERIFY THAT VIU-20 HAS ALL PROPER COMPONENTS AND IS
PROGRAMMED AS SPECIFIED BY THE RAILROAD'S OR
AGENCY'S APPROVED WIRING OR INSTALLATION DIAGRAM.
FAILURE TO DO SO MAY LEAD TO INCORRECT OR UNSAFE
OPERATION OF THE SIGNAL SYSTEM.
AFTER INSTALLATION OF A UNIT, OR WHENEVER A CHANGE
IS MADE TO THE SOFTWARE (TO INCLUDE MOVING AND/OR
COPYING THE ECD)
INSTALLATION SHOULD BE FULLY OPERATIONALLY TESTED
TO ENSURE SAFETY. SYSTEM OPERATION MUST BE VERIFIED
PRIOR TO PLACING SYSTEM IN SERVICE OR FOLLOWING
PROGRAMMING, HARDWARE
CHANGES.
VIU SYSTEM BOOTING
PLEASE W AIT
During power-up, the boot monitor checks the integrity of the MEF by
performing a 32-bit CRC calculation. If the MEF is not valid, the Boot
Monitor will not run it and a new MEF must be loaded.
WARNING
AGENCIES ARE
OR THE CONFIGURATION,
CHANGES,
NOTE
3-1
SEPTEMBER 2012 (REVISED OCTOBER 2019)
BASIC VIU OPERATION
RESPONSIBLE FOR
THE
OR WIRING