Memory Space And Circuit Program Size - Siemens LOGO! Series Manual

Programming LOGO!

3.9 Memory space and circuit program size

3.9 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:
● Retentive memory (Rem):
Note
LOGO! supports a maximum of one million write cycles. LOGO! counts every power-off,
program downloading from LOGO!Soft Comfort to LOGO!, program creation from LOGO!,
or menu setting as one cycle.
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.
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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.
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.
LOGO! device series
LOGO! 0BA6
LOGO! 0BA7
Bytes Blocks
3800
8400
REM
200 250
400 250
Manual, 04/2011, A5E03556174-01
LOGO!