Campbell PC208W, Instruction Manual

Page: 130 / 156

Appendix A. Frequently Asked Questions
A-4 PC208W, Version 3.3 Instruction Manual
What does redundant write mean?
EDLOG has detected that two instructions are writing to the same Input
Location. Writing to the same location twice is valid but is often done
unintentionally. If writing twice intentionally, ignore the warning.
What is an “ Improper use of P80” warning?
Normally P80 follows the instruction that sets the Output Flag and is used to
set the Array ID or specify were data are stored. If P80 does not immediately
follow the instruction setting the Output Flag, EDLOG generates this warning.
Using P80 in this manner has three consequences:
•
The Final Storage file that EDLOG generates may not correctly identify
how the array is divided.
•
EDLOG’s estimates of the amount of storage used may be off.
•
Some dataloggers (21X and CR7) do not support dividing arrays with
different destinations.
Why can’t I use CSI_R, CSI_1, ... as Input Location labels?
The expression compiler uses these locations to store temporary values. These
labels are reserved. Do not use these labels in your program.
Where did my expression labels go?
When you run Optimize in the Input Location Editor, EDLOG removes any
Input Location labels that are not referenced in the program or that do not have
the Manual Flag set. EDLOG does not evaluate expressions as part of the
optimization so locations that are only referenced by an expression will be
removed. This is no cause for concern as the labels are reallocated with the
next compile. The temporary labels CSI_R, CSI_1, etc. are good examples of
this.
When should I optimize?
Optimization removes all labels that are not referenced in the program or do
not have the manual flag set. It will move locations to remove any unused
locations. It will also check and reapply the Read - Write flags. It will update
all direct references (where the instructions specify an Input Location) in the
program. Indirect references are not updated. You do not need to optimize,
but it can be helpful if the Input Locations get cluttered after numerous
program changes. If in doubt, save your work before optimizing.
What’s with these “ INI” files!
PC208W uses INI files, or information files, to keep track of various program
configurations. There are INI files for each datalogger in your device map, INI
files for your modem setup, and INI files for the PC208W program itself.
Additionally, EDLOG uses an EDLOG.INI file to remember the datalogger
type you used last. It also keeps track of the program that was open when you