Memory Areas; Program Memory; Retentive Memory (Rem); Resources Available In Logo! - Siemens Logo! Manual

Programming LOGO!

3.8 Memory space and circuit dimensions

The size of a circuit program in LOGO! is limited by the
memory space (memory used by the blocks).

Memory areas

S

Program memory:

LOGO! allows only a limited number of blocks in your
circuit program.
The second limitation is based on the maximum number
of bytes a circuit program may contain. The total num-
ber of bytes used can be determined by adding up the
number of bytes used for the relevant function blocks.
S

Retentive memory (Rem):

In this area, LOGO! stores process variables which
need to be retentive, e.g. the hours counter value.
Blocks with optional retentivity use this memory area
only if this function is actually enabled.

Resources available in LOGO!

A circuit program in LOGO! can occupy the following maxi-
mum resources:
LOGO! monitors memory utilization, and offers only those
functions from the lists for which it can actually provide suf-
ficient memory space.
106
Bytes
2000
Blocks
130
REM
60
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