1.6.6 Commissioning and maintenance
1.6.6.1 Commissioning
Before the system is put into operation the safety functions must be tested/validated.
The STO-SBC function shall be activated/deactivated and the reactions shall be monitored (the reaction
depends if used as emergency stop or prevention of unexpected start-up or another safety function).
1. Safety wiring diagrams and the commissioning test shall be documented and stored
(who,what,when)
2. Define maintenance routines according to the need (see chapter maintenance)
1.6.6.2 Maintenance
IEC 61800-5-2:2017 requires to have a maintenance test for STO-SBC function. The frequency of testing
depends on the required safety level:
one test per year for SIL 2 , PL d / category 3
one test per three months for SIL 3 , PL e / category 3
The maintenance test can be done by activating STO/SBC function through STO-SBC inputs and observe
the reaction of the system.
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