Pilz PIT m3.2p machine tools pictogram - Manual (Page 27)

Function description
Operating Manual PIT m3.2p
1003176­EN­02 27
4.2.2 Control program requirements
In order to achieve SIL CL 2 (EN IEC 62061)/PL d (EN ISO 13849­1) in an application, the
evaluation must be carried out by a safety­related function block. The safety­related func­
tion block must meet the following requirements:
} The function block must enable safe "1oon" evaluation of the output signals at SOM1 ...
SOM5.
} If two or more operating modes are present at the same time, this must be detected as
an error.
INFORMATION
The function block must bridge the t1 switchover delay (see Switchover
delay t1 [ 50] ).
If a PNOZmulti (e.g. PNOZ m1p) is used as the safety control system in
conjunction with an "operating mode selector switch" function element, then
this requirement is met automatically.