Preface ...................................................................................................................................................... 3

Product overview ..................................................................................................................................... 11

1.1

Overview ................................................................................................................................. 11

1.2

Hardware and software components ...................................................................................... 13

1.3

S7-1200 Fail-Safe CPUs ........................................................................................................ 14

1.3.1

Behavior differences between standard and fail-safe CPUs .................................................. 15

1.3.1.1

Safety mode ............................................................................................................................ 15

1.3.1.2

Fault reactions ........................................................................................................................ 16

1.3.1.3

Restart of fail-safe system ...................................................................................................... 18

1.3.1.4

Firmware update ..................................................................................................................... 18

1.4

S7-1200 Fail-Safe signal modules (SM) ................................................................................. 19

1.4.1

Overview ................................................................................................................................. 19

1.4.2

SM 1226 F-DI 16 x 24 VDC .................................................................................................... 20

1.4.3

SM 1226 F-DQ 4 x 24 VDC .................................................................................................... 21

1.4.4

SM 1226 F-DQ 2 x Relay ........................................................................................................ 23

Getting started ......................................................................................................................................... 25

2.1

Introduction to example .......................................................................................................... 25

2.1.1

Instructive, interactive animation files ..................................................................................... 25

2.1.2

Requirements for configuring and programming .................................................................... 26

2.1.3

Example structure and task definition ..................................................................................... 27

2.1.4

Procedure ............................................................................................................................... 28

2.2

Configuring .............................................................................................................................. 30

2.2.1

Introduction ............................................................................................................................. 30

2.2.2

Step 1: Configuring the S7-1200 CPU 1214FC or CPU 1215FC ........................................... 31

2.2.3

Step 2: Configuring fail-safe CPU standard digital inputs for user acknowledgement,

feedback circuit, and start pushbutton .................................................................................... 34

2.2.4

Step 3: Configuring an SM1226 F-DI 16 x 24 VDC for connecting an emergency stop

switch, position switches, and the laser scanner .................................................................... 35

2.2.5

Step 4: Configuring an SM 1226 F-DQ 4 x 24 VDC for connecting a motor .......................... 43

2.2.6

Summary: Configuring the Hardware ..................................................................................... 45

2.3

Programming .......................................................................................................................... 46

2.3.1

Introduction ............................................................................................................................. 46

2.3.2

Step 5: Specifying the centralized settings for the safety program ........................................ 48

2.3.3

Step 6: Creating an F-FB ........................................................................................................ 51

2.3.4

Step 7: Programming the safety door function ....................................................................... 52

2.3.5

Step 8: Programming the emergency stop function ............................................................... 54

2.3.6

Step 9: Programming the feedback monitoring ...................................................................... 56

2.3.7

Step 10: Programming the user acknowledgment for reintegration of the fail-safe SM ......... 58

2.3.8

Step 11: Programming of the main safety block ..................................................................... 59

2.3.9

Step 12: Compiling the safety program .................................................................................. 60

2.3.10

Step 13: Downloading the complete safety program to the fail-safe CPU and activating

safety mode ............................................................................................................................ 61

S7-1200 Functional Safety Manual

Manual, 02/2015, A5E03470344-AA

Show Quick Links

Quick Links:
Sm 1226 F-DI 16 X 24...

Hide quick links:

Table of Contents

This manual is also suitable for:

Simatic s7-1200

Table Of Contents; Step - Siemens SIMATIC S7 Functional Safety Manual