
INTRODUCTION
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1-5
SIG-00-07-11 SEPTEMBER 2012 (REVISED OCTOBER 2019)
Version No.: B.2
e. DEBUG – information that may be useful to a software or hardware engineer in
understanding the internal operation of the system but is not normally useful for
anyone else.
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Diagnostic Log is stored in flash memory to prevent data loss when power is removed from
the VIU. It does not require a back-up battery.
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The number of entries that can be stored in the Diagnostic Log is 10,000.
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Events stored in the Diagnostic Log are time stamped to the hundredth of a second.
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The log is structured as a circular buffer in that once the log is full, the newest event will
overwrite the oldest recorded event..
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The entire Diagnostic Log can be downloaded to a USB drive.
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The Diagnostic Log is accessible using the web browser user interface. It can be viewed by
date/time range and can be downloaded to a PC.
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Diagnostic Log can be viewed using any of the following user interface systems:
a. A web browser over a TCP/IP network.
b. A web browser directly connected to a free Ethernet port on the VIU.
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Entries can be viewed as they are recorded and logged into the Diagnostic Log via the
Trace Events
function on the web browser user interface.
1.3.3 Status, Summary and Maintenance Logs
The Status and Summary logs are maintained on the vital side of the VIU. Most of the events
logged in these logs are also logged in the Event and Diagnostic logs, respectively. The
Maintenance Log is maintained in the DT installation directory on the PC that is running the DT
software. Each of these logs is accessible using the DT software. Please refer to Section 7 for
details on viewing these logs.
The Status and Summary logs are lost when power is removed from the VIU.
1.3.4 Consolidated Logging
When one or more VIUs are operating on a network, each VIU can be configured to forward all
events over the network to a “consolidated logger”. The logger will maintain all of the events for
every reporting VIU. The logger can be another VIU.
To configure the VIUs to send the Event and/or Diagnostic Log entries to the logger, open the
web browser user interface, select either Diagnostic Log or Event Log (or do both), enter the IP
address of the logger in the Server IP dialog box. Refer to Section 8 for details.
1.4
HARDWARE DESCRIPTION
The Siemens Vital Interface Unit (VIU) (80515) is a compact fully enclosed unit with no field-
replaceable components.