Memory Space And Circuit Program Size - Siemens LOGO! Manual

Programming LOGO!

3.8 Memory space and circuit program size

3.8 Memory space and circuit program size
The size of a circuit program in LOGO! is limited by the memory space (memory used by the
blocks).
Memory areas
● 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 number of bytes used can be determined by adding up the number of
bytes used for the relevant function blocks.
● Retentive memory (Rem):
In this area, LOGO! stores values which need to be retentive; for example, 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 maximum resources:
LOGO! monitors memory utilization, and offers only those functions from the lists for which it
can actually provide sufficient memory space.
98
Bytes
3800
Blocks
200
Manual, 10/2017, A5E01248535-AA
REM
250
LOGO!