Pilz PSS SB FT, Basic license - Manual (Page 31)

5-1 Modular Block System: Burner Management
Block design
Structure
Safety-related areas can be equipped with a multitude of safety devices such
as (e.g. E-STOPs, safety gates, light barriers). These safety devices are used
in various quantities and combinations, depending on the object requiring
protection.
The Modular Block System (MBS) is made up of individual standard function
blocks. A standard function block is geared towards the requirements of
specific safety devices (e.g. monitoring an E-STOP button, safety gate
monitoring).
A standard function block must be assigned to each safety device in order for
it to be evaluated and monitored using the MBS. This procedure enables any
combination of individual safety devices to be evaluated and monitored.
The standard function blocks can be combined in any sequence within the
user program (max. 600).
One exception to this are standard function blocks used to drive and monitor
contactors or valves. For control engineering reasons, these should be called
up at the end of the user program.
MBS Basics