Rockwell Automation 1336T Function Block Prog. Manual, Series A/B - Manual (Page 14)

1–2 Getting Started
1336 FORCE — 5.9 August 1995
The output from the RATE LIMITER function block will be a sawtooth
signal. The value of the RATE LIMITER output will ramp up to the
value specified by the MULTIPLEXER input #1 (+ 32767). When the
RATE LIMITER output reaches the maximum value specified by the
LIMIT block t1 (+32765), the max limit flag will set the SR FLIP
FLOP output, which in turn selects the MULTIPLEXER input #2. The
RATE LIMITER output will then ramp down to this new value of
– 32767.
Max Value
Min Value
Max Value
Min Value
Out 1
RATE LIMIT
LIM
MULTIPLEXER Out
Lim In
RATE LIMITER
t1 "
Input
LIMIT
Set
SR FLIP FLOP INPUTS
Reset
A
B
C
At2
At2
When the RATE LIMITER output reaches the minimum value specified
by the LIMIT block (– 32765), the min limit flag will clear the SR
FLIP FLOP output (t2), which in turn selects the MULTIPLEXER input
#1. The RATE LIMITER output will continue to ramp up and down
between the LIMIT block minimum and maximum values.
Sawtooth Application
Operation