Fail-Safe Systems
A5E00085588-03
A-1
A Check Lists
A.1 Life Cycle of the Fail-Safe Programmable Controllers
The following table gives you a summary in the form of a check list of the activities
in the life cycle of S7 F/FH Systems as well as the requirements and rules that
must be complied with. You can find detailed safety guidelines in the sections
referred to in the Refer to column, e.g.:
F-SYS: Sect. 5.2.3 means section 5.3.2. of the "Fail-Safe Systems" manual.
F-SM: Chap. 3 means Chapter 3 of the "Fail-Safe Signal Modules" manual.
F ET 200S: Chap. 5 means Chapter 5 of the „ET 200S Distributed I/O System,
Fail-Safe Modules
Check List
Phase Note Refer to Check
Planning
Prerequisite: A "Safety
requirements specification"
must be available for the
planned application
Depends on the
process
-
Specification of the system
architecture
Depends on the
process
-
Allocation of functions and
subfunctions to the system
components
Depends on the
process
F-SYS: Sect. 1.7
F-SYS: Sect. 7.3
Selection of the sensors and
actuators
Requirements placed
on the actuators
F SM: Sect. 3.5,
F-SYS: Sect. 7.2
F ET200 S Sect. 6.5
Definition of the necessary
safety properties of the
individual components
DIN V 19 250
IEC 61508
F-SYS: Sect. 7.1, 7.2
Configuration
Installation of the add-on
package
Prerequisites for
installation
F-SYS: Sect. 1.6
Selection of S7 components Rules for physical
configuration
F-SYS: Sect. 1.3, 7.3
F SM: Sect. 3.1
F ET200 S Sect. 3.2
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