Rockwell Automation T8094 8000 Series TMR System Safety Manual - Manual (Page 82)

SAFETY MANUAL
D oc N umber T8094
I ssue 27 – June 2013
Page 61 of 103
5. PREVIOUSLY ASSESSED FUNCTIONS
The following list shows those function blocks that have been proven safe to use in
Certified systems.
Boolean
(>=1) Logical Or (2 to 16 inputs)
(&) Logical And (2 to 16 inputs)
( ) Inverted Line (Boolean inversion)
(=1) Exclusive Or
(RS) Reset dominant Latch
(SR) Set dominant latch
(ftrig) Falling edge detection
(rtrig) Rising edge detection
Timers
(TON) Timer delay on
(TOF) Timer delay off
Counting
(CTU) Counter
Comparison
Tests
(>=) Greater than or Equal to
(<=) Less than or Equal to
(=) Equal to
(>) Greater than.
Arithmetic
(+) Add (2 to 16 inputs)
Logic
(And Mask.) And Mask
Signal
Generation
(sig_gen) Function Generator
Data
Manipulation
(sel) Binary selector (Selects one of 2 integer variables)
(MOD) Modulo