Pilz PSS SB FT, Basic license - Manual (Page 52)

6-8 Modular Block System: Burner Management
Standard Function Blocks SB149
• Step monitoring time W_E
If the step monitoring time has elapsed and the output parameter W_E
changes from 0 to 1, this alarm must be evaluated. The responsibility for
this lies solely with the user.
An application example for step monitoring time can be found in
Chapter 8.
• Time delay D_E
There are two options for time delay:
- Time delay can be used to carry out a function for the duration of the
time delay, or
- To start a function after this time ( D_E = 1).
An application example for time delay can be found in Chapter 8.
• Active steps in a sequence
To avoid a dangerous situation occurring in a process, the user must
ensure that only one step is active in a sequence at any given time.
SB149
STEP
M 70.10 .RDY Step_1 - X - RDY
M 70.12 .COND Step_1 - X - COND
M 70.08 .Step_1 - X - STEP
B - W_BA
W - W_V
Z - W_T
B - D_BA
W - D_V
Z - D_T
NEXT - X
W_E - X
D_E - X