Contents
viii
System- and communication configuring D7-SYS - SIMADYN D
Edition 12.2003
2.1.4
Operating statuses of a CPU module .................................................................. 2-14
2.1.5
Configuring example of a CPU module ............................................................... 2-15
2.1.5.1
Task ..................................................................................................................... 2-15
2.1.5.2
Solution ................................................................................................................ 2-15
2.1.6
Description and use of the signal transfer mechanisms ...................................... 2-17
2.1.6.1
Data consistency.................................................................................................. 2-17
2.1.6.2
Data transfer within the same task of a CPU....................................................... 2-18
2.1.6.3
Data transfer between various CPU tasks........................................................... 2-18
2.1.6.4
Data transfer between cyclic tasks of several CPUs ........................................... 2-19
2.1.6.5
Data transfer between interrupt tasks of several CPUs ...................................... 2-20
2.1.6.6
Minimizing the deadtimes .................................................................................... 2-21
2.1.6.7
Processing sequence within a basic CPU clock cycle ........................................ 2-21
2.1.6.8
Interconnection changes and limited number of interconnections ...................... 2-21
2.1.7
Significance and uses of the process image ....................................................... 2-23
2.1.7.1
Implementing the process image......................................................................... 2-24
2.1.7.2
Process image for cyclic tasks............................................................................. 2-25
2.1.7.3
Process image for interrupt tasks ........................................................................ 2-26
2.1.8
Significance and application of the CPU synchronization ................................... 2-27
2.1.8.1
Time synchronization ........................................................................................... 2-27
2.1.8.2
Synchronizing its own basic clock cycle to the basic clock cycle of a master
CPU...................................................................................................................... 2-27
2.1.8.3
Synchronizing its own basic clock cycle to an interrupt task of a master CPU ... 2-28
2.1.8.4
Synchronizing its own interrupt tasks to interrupt tasks of a master CPU........... 2-28
2.1.8.5
Synchronizing several SIMATIC TDC/SIMADYN D stations ............................... 2-28
2.1.8.6
Response when the synchronization fails ........................................................... 2-28
2.1.8.7
Configuring the CPU basic clock cycle synchronization...................................... 2-28
2.1.8.8
Configuring the interrupt task synchronization .................................................... 2-30
2.1.8.9
Example of a synchronization configuration ........................................................ 2-31
2.1.9
Significance of the processor utilization .............................................................. 2-31
2.1.9.1
Determining the approximate processor utilization.............................................. 2-31
2.1.9.2
Calculating the precise processor utilization ....................................................... 2-32
2.1.9.3
Mode of operation of the task administrator ........................................................ 2-32
2.1.9.4
Eliminating cycle errors........................................................................................ 2-34
2.1.10
Technical data of the operating system ............................................................... 2-34
2.1.10.1
Features ............................................................................................................... 2-34
2.1.10.2
The basic operating system functions ................................................................. 2-36
2.1.10.3
The service utility ................................................................................................. 2-39
2.2
Function description and user instructions .......................................................... 2-41
2.2.1
Fatal system error "H".......................................................................................... 2-41
2.2.2
Background processing ....................................................................................... 2-43
2.2.2.1
Online test mode.................................................................................................. 2-44
2.3
System chart @SIMD .......................................................................................... 2-45
3
Communications configuring ............................................................................................... 3-1
3.1
Introduction ............................................................................................................ 3-2
3.1.1
Basic information on communications ................................................................... 3-2
3.1.1.1
Overview of the various data couplings ................................................................. 3-2
3.1.2
Overview of the communication utilities................................................................. 3-8
3.1.3
Communication block I/Os ..................................................................................... 3-9
3.1.3.1
Initialization input CTS ........................................................................................... 3-9
