Blocks required, Programming guidelines, Standard function blocks – Pilz PSS SB FT, Basic license User Manual
Page 68: Sb151
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Modular Block System: Burner Management
Standard Function Blocks
Blocks required
• DB002:
Will be made available when the configurator is called up.
• DB015:
Administration data block
DB015 must consist of its total length of 1024 data words and
have Read/Write status (refer also to the section “Administrati-
on data blocks DB015, DB016 and DB017” in chapter 5).
• OB101:
To call up SB 151
• SB151:
BridgedS
• SB152:
BR_START for the error reaction
• SB255:
To call up the operating system
Programming guidelines
ENBL
The enable
ENBL from SB151 must be supplied to the AND-operation
before the global input
ERR or to the AND-operation before the global
input
CHAI of SB152 “Burner: Start and operator elements”. The decision
to use
ERR or CHAI depends on the user and the respective standards
regarding error reactions.
ERR:
If an error occurs, a controlled shutdown is carried out when
AuSt = 1 with restart.
CHAI: If an error occurs, a safety shutdown is carried out.
A programming example can be found in Chapter 8 under “Managing
enables”.
SB151