Siemens SIMATIC C7-635, Manual

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Product Overview
2-6
C7-635 Control System
A5E00155581-04
CPU
The user program controlling the process runs on the C7-635.
The following functional units determine the mode of operation of the C7-635:
• Loading memory
The loading memory is located on the Micro Memory Card (MMC) and contains
the user program.
• Processor
The processor executes the program cyclically:
– At the beginning of the cycle, the processor reads the signal states on all
inputs and generates a process image of the inputs (PII).
– The program is executed step-by-step using internal counters, bit memory,
and timers.
– The processor stores the calculated signal states in the process output
image (POI). At the end of the cycle, the process image is transmitted to the
outputs.
Touch Panel/Operator Panel
The touch panel and the operator panel of the C7-635 are based on the standard
Windows CE operating system. You can visually display operating modes, current
process values, and faults. You can also make entries on the C7-635. Simple
machine diagnostic functions are also possible.
You can also incorporate your own graphics, digital pictures, and scanned images
into your project. Moreover, you can represent elements such as temperature
variations graphically using bar graphs and diagrams.
Scope of Functions
CPU
• 64 Kbytes of CPU user memory
• Various sizes of loading memory and retentive memory in the Micro Memory
Card
• Integrated I/O
– 24 DI
– 16 DO
– 4 AI
– 2 AO
– 1 PT 100