Operating instructions

SEPTEMBER 2005 MAGNUM 1X7 LTO AUTOLOADER
8-5
WHAT THE AUTOLOADER RETURNS
8.3.1 LOG PARAMETER FORMAT
Each log parameter begins with a four-byte header followed by one or more
bytes of parameter value data.
Parameter Code – Bytes 00 and 01
The Parameter Code field identifies which log parameter is being transferred
for that log page. The valid values for this field depend on the type of log page
the autoloader is returning, as described later in this chapter.
Parameter Control (DU, DS, TSD, ETC, TMC, LP) – Byte 02
The Parameter Control field consists of the following bits:
DU – Disable Update This bit indicates that the autoloader updates the log
parameter value to reflect all events that should be recorded by that
parameter. This bit is always 0.
DS – Disable Save This bit indicates that the autoloader does not support
saving for that log parameter. This bit is always 1.
TSD - Target Save Disable This bit indicates that the autoloader provides a
self-defined method for saving log parameters. This bit is always 0.
ETC – Enable Threshold Comparison This bit indicates a comparison to the
threshold value is not performed whenever the cumulative value is updated.
This bit is always 0.
TMC – Threshold Met Criteria This field defines the basis for comparison of
the cumulative and threshold values. This field is always 0.
LP – List Parameter The List Parameter bit indicates the format of the log
parameter:
0 – The parameter is a data counter.
1 – The parameter is a list parameter.
Bit
Byte
7 6 5 4 3 2 1 0
00 (MSB)
Parameter Code
(LSB)
01
02 DU DS TSD ETC TMC RSVD LP
03 Parameter Length
04 (MSB)
Parameter Value
(LSB)
...
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