48
Table 5-27 Memory Partition Status/Control Window Registers
Parameter Offset Type R/W Range
Log partition status +0 UINT16 R Bit-mapped register:
bit 0 = 0 - non-wrap partition
= 1 - wrap-around partition
bit 4 = 1 - TOU monthly profile partition
bit 5 = 1 - TOU daily profile partition
bit 9 = 1 - reading after the end of file:
the read pointer has rolled over the end of a log file,
that is the file is being re-read from the beginning.
This bit is cleared when the read pointer [+6] points
to a new record, or either command register [+6] or
[+7] is written.
The total number of records
logged in the partition/sub-
partition
+1 UINT16 R 0 to 65535. Returns the total number of logged
records available in the partition.
The number of the new records
never read before
+2 UINT16 R 0 to 65535. Returns the number of records from the
first new one never read before and until the end of
the log file.
The next sequence number to be
used when the next log event will
take place
+3 UINT16 R 0 to 65535 (increments modulo 65536 with each
log). Returns the sequence number that will be
applied to the next record being logged.
The sequence number of the first
(oldest) record in the log file
+4 UINT16 R 0 to 65535. Returns the sequence number of the
oldest record in the log file.
The sequence number of the
first new record never read
before
+5 UINT16 R 0 to 65535. Returns the sequence number of the
first new (most recent) record that has never been
read. If this number is equal to the contents of
register [+3], there are no newest records never
read before.
The sequence number of the
current record to be read
+6 UINT16 R/W
1
0 to 65535. Points to the record that will be read via
the partition read window. Can be overwritten to
point to the desired record.
Command register +7 UINT16 R/W This is a write-only register. Write value:
0 = automatically restores the read sequence to the
beginning of the log file, that is puts the read
pointer to the first (oldest) record in the log file
(actually, safely copies the contents of the register
[+4] to the register [+6]).
1 = automatically sets the read sequence to the first
new record never read before, that is puts the read
pointer to the record following the last one
whenever read. If there are new records in the
partition, this actually copies the contents of the
register [+5] to the register [+6]. If there are no
new records, the register [+5] will point to the first
(oldest) record in the log file as if the command
register was written with zero.
Read as 0.
1
If there is no record in the log file that matches the written sequence number, the instrument will respond with the
exception code XP (invalid data).
5.14 Event Log Registers
These registers allow you to circularly read a packet of consequent records from the event log file. From 1 to 6
event log records can be read at a time via the event log windows, which comprise registers CD80h through
CDAFh. Reading from either register window always returns the next logged event record. All registers within one
window must be read at once using a single request. After reading an event log window, the partition queue
pointer is shifted forward until the end of the log file. After the last record has been read, the file pointer is
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