Inside the display system
380
1SVC 440 795 M1100
Example
The expansion unit may be powered up later than the display
system. This means that the display system is switched to
RUN when an expansion unit is missing. The following
display system circuit diagram detects if the expansion unit
is functional or not functional.
Figure: 193: Circuit diagram for expansion testing
As long as I14 is 1, the remaining circuit diagram is skipped.
If I14 is 0, the circuit diagram is processed. If the expansion
unit drops out for any reason, the circuit diagram is skipped.
M01 detects whether the circuit diagram was processed for
at least one cycle after the power supply is switched on. If
the circuit diagram is skipped, all the outputs retain their
previous state.
Analog output QA The analog output operates with decimal values between 0
and 1023. This corresponds to a 10-bit resolution. At the
output this corresponds to a physical voltage between 0 V
and 10 V DC.
Negative values such as: –512 are evaluated as zero and
output as 0 V DC.
Positive values greater than 1023, such as 2047, are
evaluated as 1023 and output as 10 V DC.
Loading and saving
programs
You can either use the display system interface to save
programs to a memory module or use CL-SOFT and a
transmission cable to transfer them to a PC.
I 14----m 01-------------------Ä : 08
------------------------------S M 01
I 14--------------------------Ä : 08
I 01--u-I 02------------------Ä Q 01
Q 01--k
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