Campbell Scientific CR23X Micrologger User Manual

Page 16

CR23X MICROLOGGER OVERVIEW

OV-6

1. System Memory - used for overhead tasks

such as compiling programs, transferring
data, etc. The user cannot access this
memory.

2. Active Program Memory - available for

user entered programs.

3. Input Storage - Input Storage holds the

results of measurements or calculations.
The

Mode is used to view Input

Storage locations for checking current
sensor readings or calculated values. Input
Storage defaults to 64 locations. Additional
locations can be assigned using the

Mode.

4. Intermediate Storage - Certain Processing

Instructions and most of the Output
Processing Instructions maintain
intermediate results in Intermediate
Storage. Intermediate storage is
automatically accessed by the instructions
and cannot be accessed by the user. The
default allocation is 64 locations. The
number of locations can be changed using
the

Mode.

5. Final Storage - Final processed values are

stored here for transfer to printer, solid
state Storage Module or for retrieval via
telecommunication links. Values are stored
in Final Storage only by the Output
Processing Instructions and only when the
Output Flag is set in the user’s program.
Approximately 570,000 locations are
allocated to Final Storage from SRAM on
power up. This number is reduced if Input
or Intermediate Storage is increased.

While the total size of these three areas
remains constant, memory may be
reallocated between the areas to
accommodate different measurement and
processing needs (

Mode, Section

1.5).

6. Alphanumeric Labels - The CR23X can

be programmed through EDLOG (PC208W
software) to assign alphanumeric labels to
Input Storage and Final Storage locations.
Labels must consist of letters, numbers, or
the underscore ( _ ), and must not begin
with a number.