Manual VIPA System 300S SPEED7 Chapter 1 Basics
HB140E - CPU SC - RE_313-6CF03 - Rev. 07/45 1-5
CPU Applications
The program that is present in every CPU is divided as follows:
• System routine
• User application
The system routine organizes all those functions and procedures of the
CPU that are not related to a specific control application.
This consists of all the functions that are required for the processing of a
specific control application. The operating modules provide the interfaces
to the system routines.
Operands of the CPU
The following series of operands is available for programming the CPU:
• Process image and periphery
• Bit memory
• Timers and counters
• Data blocks
The user application can quickly access the process image of the inputs
and outputs PAA/PAE. You may manipulate the following types of data:
• individual Bits
• Bytes
• Words
• Double Words
You may also gain direct access to peripheral modules via the bus from
user application. The following types of data are available:
• Bytes
• Words
• Blocks
Overview
System routine
User application
Overview
Process image
and periphery
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