A.3.1 IEC 61800 architectural categories
From the architectural point of view, IEC 61800 application is reflected in two tables, §6.2.2.3 Tab. 3 and Tab. 4,
for the two different types of classified devices. The CPU or the whole microcontroller, considered as complex
electronics parts, are classified as Type B. Also the concept of HFT is derived from IEC 61508 as it is.
Architectural remapping on IEC61508 is therefore straightforward.
A.3.2 IEC 61800 safety metrics computation
The PFH of a safety function performed by PDS(SR) is evaluated by the application of IEC 61508-2. The strong
link with the norm IEC 61508 is reflected also by the adoption in IEC 61800-5-2 of the same relevant metrics PFH,
ref. to §6.2.1, and SFF, ref. to §6.2.3.So, results of this Safety Manual (and related FMEA or FMEDA) can be re-
mapped in IEC61800 domain.
A.3.3 IEC 61800 work products
The following table lists the work products required by the IEC 61800-5-2 standard and their mapping with the
work products from IEC 61508 compliance activity.
Table 124. IEC 61800 work product grid
IEC 618000 5.2
STM32F2 Series
IEC 61508 document
Information to be provided
IEC 61800-5.2 Part-
Clause
Safety requirements specification (SRS) for PDS(SR) including safety
function requirements and safety integrity requirements
5.4
End user responsibility
Verification of PDS(SR) safety requirements specification 8.2
Hardware design on an architectural level 6
Software design on an architectural level IEC 61508-3
Estimation of the probability of failure of safety functions due to random
hardware failures on a level of functional block diagrams
IEC 61508-2
STM32F2 Series Safety Manual and
FMEDA
Reviews of system design 8.2
End user responsibility
Detailed planning of the validation of safety related PDS(SR). 8.3
Hardware design
6
Software design
Reliability Prediction 6
STM32F2 Series Safety Manual and
FMEDA
UM1845
IEC 61800-5-2:2007
UM1845 - Rev 4
page 96/108
To Next Page
Loading...
