Display system program cycle
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1SVC 440 795 M1100
How the display system evaluates the high-speed
counters CF, CH and CI
In order to evaluate the count pulses of 3 kHz, the high-
speed counter function blocks operate with an interrupt
routine. The length of the circuit diagram and the associated
cycle time has no effect on the counter result.
Display system memory management
The display system is provided with different memories.
• The working memory or RAM, size 8 KByte
The RAM only stores the data when the device power
supply is active.
• The screen memory, size 24 KByte
The screen memory stores the visualization data created
with CL-SOFT retentively.
• The program memory, size 8 KByte
The program memory stores the program retentively.
Distribution of data in the RAM
When the power supply is switched on, the RAM stores the
program, the retentive data and the screens to be displayed.
This has a direct effect on the size of the program and the
screens. The number of retentive data bytes reduces the
memory available for program and screens. The largest
screen to be displayed likewise reduces the memory
available for the program.
h
Only use as much retentive data as is actually required.
The screen with the largest memory requirement reduces
the memory available for the program. Several smaller
screens allow more space for the program.
Use as small pictures as possible with 1 bit greyscale. The
pictures should normally be 32 × 32 pixels in size in order
to fully utilise the optimum brilliance of the display.