Pilz PSS SB NOT, Basic license - Manual (Page 83)

7-3 Modular Block System: Emergency Stop Circuits
• Create OB101
- Reset all enable flags ( FG/ENBL) at the start of the OB or at the start of
the cycle. This way you can be sure that the FG flags are indeed set.
INFORMATION
On some blocks (e.g. E-STOP) the input parameter “SSNR” is monitored
(see the description of the relevant SB in Chapter 6). These blocks must
be run through as part of each PSS cycle. The following commands
should therefore be entered once only at the end of OB101:
DB015 A
DW1015 I
- Call up the E-STOP standard function blocks directly in OB101 or, for
example, global call in an FB.
- Check:
Have all the blocks required for the application been called up?
• Things to note when starting up the program
Tip:
- On start up, the PSS clears all the flag words, outputs, timers and
counters in the FS section. All the necessary constants should
therefore be set when starting up the program.
• Link Project
INFORMATION
- All safety devices should be checked to ensure they operate correctly.
- Short-circuits and open circuits should be simulated.