Chapter 1 Principles
Manual VIPA CPU 21x
1-16
HB103E - Rev. 05/45
CPU 21x programs
The program that is present in every CPU is divided as follows:
•
System routine
•
User program
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.
CPU 21x operands
The following operands are available for programming the CPU 21x:
•
Process image and periphery
•
Bit memory/marker
•
Timers and counters
•
Data blocks
The user program can quickly access the process image of the inputs and
outputs PII/PIO. 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
your user program. The following types of data are available:
- bytes
- words
- blocks
Overview
System routine
User program
Overview
Process image
and periphery
Summary of Contents for CPU 21 Series
Page 1: ...Manual VIPA CPU 21x Order No VIPA HB103E Rev 05 45 ...
Page 2: ...Lerrzeichen ...
Page 6: ...About this Manual Manual VIPA CPU 21x Subject to change to cater for technical progress ...
Page 10: ...Contents Manual VIPA CPU 21x iv HB103E Rev 05 45 ...
Page 30: ...Chapter 1 Principles Manual VIPA CPU 21x 1 18 HB103E Rev 05 45 ...
Page 58: ...Chapter 2 Hardware description Manual VIPA CPU 21x 2 28 HB103E Rev 05 45 ...
Page 80: ...Chapter 3 Deployment CPU 21x Manual VIPA CPU 21x 3 22 HB103E Rev 05 45 ...
Page 178: ...Chapter 5 Deployment CPU 21x 2BT02 with H1 TCP IP Manual VIPA CPU 21x 5 48 HB103E Rev 05 45 ...