schmersal PSC1-C-10 Series Installation Manual page 6

Installation manual
7.5 Parameter configuration..................................................................................................................... 134
7.5.1 Using the Memory Card ...................................................................................................... 134
7.6 Function test ....................................................................................................................................... 135
7.7 Validation ........................................................................................................................................... 135
8 SAFETY-RELATED CHECK .............................................................................. 136
9 MAINTENANCE ................................................................................................. 137
9.1 Modification / dealing with changes to the device ............................................................................. 137
9.2 Replacement of a module ................................................................................................................... 137
9.3 Servicing interval ................................................................................................................................ 137
10 TECHNICAL DATA ......................................................................................... 138
10.1 Ambient conditions ............................................................................................................................ 138
10.2 Safety-related characteristic data ....................................................................................................... 138
11 SWITCH TYPES .............................................................................................. 139
12 NOTES FOR DESIGNING, PROGRAMMING, VALIDATING AND TESTING
SAFETY-RELATED APPLICATIONS ....................................................................... 146
12.1 Risk assessment .................................................................................................................................. 146
12.2 Technical documentation required ..................................................................................................... 148
12.3 Steps required for designing, realisation and testing .......................................................................... 149
12.3.1 Phases of the V model ....................................................................................................... 150
12.3.2 Specification of the safety requirements (breakdown) ....................................................... 151
12.3.3 Specification of the functional safety system ...................................................................... 154
12.3.3.1 Definition of the safety functions ................................................................................. 154
12.3.3.2 Performance Level required (PLr) (additional emergency stop) ................................ 154
Example - specification of the safety functions in tabular form ................................. 155
12.3.3.3
12.3.4 Software specification ......................................................................................................... 156
12.3.5 Hardware specification ....................................................................................................... 158
12.3.5.1 Selection of SRP/CS and equipment ......................................................................... 158
12.3.5.2 Examples for hardware specification .......................................................................... 159
12.3.5.3 Consideration of systematic failures ........................................................................... 160
12.3.6 Hardware and software design ........................................................................................... 161
12.3.7 Check on the hardware design ........................................................................................... 161
12.3.7.1 Iterative check on the safety level achieved ............................................................... 162
12.3.8 Verification of software (program) and parameters ............................................................ 164
12.3.8.1 FUP check .................................................................................................................. 164
12.3.8.2 Validating FUP against IL and parameters using validation report ............................ 166
12.3.9 Performance of system tests / FIT test (Fault Injection Test) ............................................. 169
13 APPENDIX ...................................................................................................... 170
13.1 Appendix A - categorisation of the switch types ................................................................................ 170
13.2 CE - declaration of conformity ............................................................................................................ 173
PSC1-C-10 Installation manual V2.6
Version: 57E
Page 6 of 173