Siemens SIMATIC S7 Sistem Kılavuzu - Sayfa 6
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Table of contents
3.3.3
Installing and removing a signal board or battery board...................................................... 59
3.3.4
Removing and reinstalling the terminal block connector ..................................................... 61
3.3.5
Installing and removing an expansion module.................................................................... 62
3.3.6
Installing and removing the expansion cable ...................................................................... 63
3.4
Wiring guidelines ............................................................................................................... 64
4
PLC concepts ........................................................................................................................................ 71
4.1
Execution of the control logic............................................................................................. 71
4.1.1
Reading the inputs and writing to the outputs .................................................................... 72
4.1.2
Immediately reading or writing the I/O ............................................................................... 73
4.1.3
Executing the user program ............................................................................................... 73
4.2
Accessing data ................................................................................................................... 75
4.2.1
Accessing memory areas.................................................................................................... 76
4.2.2
Format for Real numbers.................................................................................................... 82
4.2.3
Format for strings .............................................................................................................. 82
4.2.4
Assigning a constant value for instructions ......................................................................... 83
4.2.5
Addressing the local and expansion I/O............................................................................... 83
4.2.6
Using pointers for indirect addressing................................................................................. 84
4.2.7
Pointer examples ............................................................................................................... 86
4.3
Saving and restoring data................................................................................................... 87
4.3.1
Downloading project components...................................................................................... 87
4.3.2
Uploading project components .......................................................................................... 89
4.3.3
Types of storage................................................................................................................. 91
4.3.4
Using a memory card ......................................................................................................... 91
4.3.5
Inserting a memory card in a standard CPU ........................................................................ 94
4.3.6
Transferring your program with a memory card .................................................................. 94
4.3.7
Restoring data after power on ............................................................................................ 98
4.4
Changing the operating mode of the CPU........................................................................... 99
4.5
Status LEDs ........................................................................................................................ 99
5
Programming concepts...................................................................................................................... 103
5.1
Guidelines for designing a PLC system .............................................................................. 103
5.2
Elements of the user program .......................................................................................... 105
5.3
Creating your user program.............................................................................................. 107
5.3.1
STEP 7-Micro/WIN SMART compatibility ............................................................................ 107
5.3.2
Earlier versions of STEP 7-Micro/WIN projects.................................................................... 108
5.3.3
Using STEP 7-Micro/WIN SMART user interface.................................................................. 110
5.3.4
Using STEP 7-Micro/WIN SMART to create your programs .................................................. 111
5.3.5
Using wizards to help you create your control program ..................................................... 112
5.3.6
Features of the LAD editor................................................................................................ 113
5.3.7
Features of the FBD editor................................................................................................ 113
5.3.8
Features of the STL editor................................................................................................. 114
5.4
Data block (DB) editor ...................................................................................................... 115
5.5
Symbol table.................................................................................................................... 117
5.6
Variable table................................................................................................................... 120
5.7
PLC error reaction ............................................................................................................ 124
5.7.1
System Information ......................................................................................................... 126
6
System Manual, V2.7, 08/2022, A5E03822230-AK
S7-200 SMART