8/11/2017 3:46 PM | |
Posts: 2 Rating:
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Hello, I'm trying to run pfd assessments on safety functions using the Simatic Safety System (please see attached). However, it was not very clear what proof test intervals are associated with the claimed pfd for the Simatic Safety System (CPU, I/O's etc). The only metric mentioned was the mission time and I had to find out via another separate document that Siemens systems are designed with Working Life = Proof Test Interval. However, it still was not clear because some of the items like 6ES7136-6RA00-0BF0, show a mission life of 20 years and at the same time specific function test intervals (proof test?) of 1 year or 1 month depending on SIL requirement. I'm just looking for clarification on what proof test intervals are associated to each claimed pfd. Thanks in advance Ghassan ------------------------------------------------------------------------------------------ Attachmentsafety_pfd_pfh_2nd_ed_fail_product_info_x_en-US.pdf (1631 Downloads) |
Last edited by: Jen_Moderator at: 8/14/2017 10:25:52 AMNew subject after splitting |
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