Rockwell Automation 1336T Function Block Prog. Manual, Series A/B - Manual (Page 89)

Function Block Library 4–27
1336 FORCE — 5.9 August 1995
FUNCTION
Denominator = 1/2
× ∆
t
×
1/(divisor gain) = 25600
where:
∆
t = a task interval of .020 seconds = 1/50 samples/second.
divisor gain = 256.
1. If Set = true, accumulator = Preset
×
denominator.
2. If Set = false,
accumulator = [Gain
×
(Input
i–1
+ Input)] +
previous accumulated value.
3. If accumulator
÷
denominator > Max,
Output = Max, Hi Lim = true, Lo Lim = false.
4. If accumulator
÷
denominator < Min,
Output = Min, Hi Lim = false, Lo Lim = true.
5. If accumulator
÷
denominator < Max and > Min,
Output = accumulator
÷
denominator, Hi Lim = false,
Lo Lim = false.
PARAMETERS DATA TYPE LINKABLE DEFAULT VALUE RANGE
Input Signed Integer Yes 0
±
32767
Set Logic Input Yes False True/False
Preset Signed Integer Yes 0
±
32767
Gain Signed Integer No 256
±
16383
Min Signed Integer No 0 0 to – 32767
Max Signed Integer No 0 0 to + 32767
Lo Lim Logic Output No — True/False
Hi Lim Logic Output No — True/False
Output Signed Integer No —
±
32767
Example 1 — Gain = 256 = 1
×
— Horizontal Scale = 500 mS/Division
Y
INTEGRATOR Output
+ 32767 "
– 32767 "
INTEGRATOR Input
B
In Example 1, the INTEGRATOR Output accumulates at a rate of 32767 units-per-second,
an amount equal to it’s constant INTEGRATOR Input level. It takes (2) seconds to traverse
the entire range.
INTEGRATOR
(continued)