User Manual

Programming LOGO!
3.9 Memory space and circuit program size
LOGO!
130 Manual, 04/2011, A5E03556174-01
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:
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.
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! device series Bytes Blocks REM
LOGO! 0BA6 3800 200 250
LOGO! 0BA7 8400 400 250
LOGO! monitors memory utilization, and offers only those functions from the lists for which it
can actually provide sufficient memory space.