Hardy HI 1746-WS - Manual (Page 39)

Chapter 4 - Setup
4-9
Reading from the
32 Word Logical I
and logical M1
files Reads are all done in the I file (not to be confused
with the “logical I file”). Word #0 will always be a
copy of the “Command Word”. Words 1-7 of the I file
can be configured to read up to 7 words from either
the Logical M1 or the Logical I file (you cannot read
from both at the same time).
Command Word
Bits 15-14 set
to “10” Allows the user to specify what words (up to 7) from
the logical I file to appear in words 1-7 in the I file.
For
Example If bits 15-14 are set to 10 in “Command Word” and
words 1-7 of the O file are: 18,19, 20, 21, 16, 15, 24.
The return in the I file words 0-7 would be (in order):
“Command Word”, gross weight (MSW), gross
weight (LSW), net weight (MSW), net weight (LSW),
relay status, module status, and ROC evaluation
period.
Bits 15-14 set
to “11” When written to the logical M0 file, will cause the I
file to reflect the words at the same starting offset in
the logical M1 file as specified in bits 7-0.
For
Example If 2 words are written to the logical M0 file starting at
offset word 28, then offset words 28 and 29 of the log-
ical M1 file would appear in words 1 and 2 of the I
file.
Bits 15-14 set
to “01” For a write will cause the I file to reflect the words
previously selected to read using the “10” setting.
NOTE: The selected words to read are not necessarily the
ones being written to using the “01” setting.
Bits 15-14 set
to “00” Returns the configuration set up with the “10” com-
mand.
NOTE: After an input byte is configured, the 1746 will
remember the configuration as long as it has power.
The Configuration is lost after you power down.