EZD Program cycle
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MN05013005E
389
When wiring more than four contacts in series, use one of the
marker relays.
Figure 188: Circuit diagram with M 01 marker relay
How EZD 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.
Memory management of the EZD
The EZD 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 EZSoft 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.
I 01----Q 04----i 03----I 05---Ä M 01
I 02----I 04----M 01-----------Ä Q 02
