Example, Mbs basics – Pilz PSS SB FT, Basic license User Manual
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5-8
MBS Basics
Modular Block System: Burner Management
NOTICE
• One MBS standard function block must be used for each safety device.
• Each standard function block should be assigned its own SSNR.
• Make sure that each SSNR is assigned once only.
If two SB calls have the same value for the SSNR, they will access the
same data word in the administration data block. This can lead to
malfunctions.
• Document the assignment of the safety device to the respective SSNR of
the standard function block.
Example
Safety device 2 (E-STOP button) is monitored using SB061. The value
KB002 is assigned to input parameter SSNR of SB061.
The following DWs in DB015 are therefore assigned to safety device 2:
Block 1:
DW0002
Block 2:
DW0202
Block 3:
DW0402
Block 4:
DW0602
Block 5:
DW0802
The user program has read-only access to these data words.