AS and OS expansions
7.3 Changes to the safety program or F signal modules
Compendium Part D - Operation and Maintenance (V9.0)
92 Operating Manual, 02/2018, A5E43228948-AA
Changes to the safety program or F signal modules
There are other regulations and procedural guidelines for F/FH systems in safety mode in
addition to those described in the section titled "Program changes" (Page 82).
● Qualified personnel who hold the necessary authorizations and qualifications to
commission and/or maintain the SIMATIC F system, as well as devices and systems
associated with PIC protection functions, in accordance with the safety engineering
requirements of the manufacturer and the TÜV (German Technical Inspectorate).
● Modifications to the safety-instrumented system must be carefully planned, tested, and
approved prior to implementation.
● You must ensure that the safety integrity level required of the system is maintained during
and after the modifications.
● All changes must be documented. Management of Change (MOC) (IEC 61511) must be
performed according to the specifications for the respective plant.
Note
You can find more information in IEC 61511
Changing the safety program
You can make changes to the safety program either offline or online. Depending on the type
of change in question, it may be possible to do this in runtime. If not, an F-startup or CPU
warm restart is required.
Note
You can find more in
formation in the following manuals:
Making and downloading changes in safety mode:
Manual "Industrial Software S7 F/FH Systems – Configuring and Programming"
(https://support.industry.siemens.com/cs/ww/en/view/109742100) in section "Changing
the safety program".
Safety mode, changes, change tracking and acceptance:
Manual "PCS 7 Compendium - Part B - Process Safety", section "Changes, tracking
changes, and acceptance"
The following sections contain a range of use cases which require a particular procedure.
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