Rockwell Automation 1336T Function Block Prog. Manual, Series A/B - Manual (Page 86)

Function Block Library 4–24
1336 FORCE — 5.9 August 1995
3. If Min Val < Input and < Max Val:
Calculate x
i
, x
i+1
from Input, where x
i
≤
Input
≤
x
i+1
.
Calculate y
i
, y
i+1
from x
i
, x
i+1
.
Output = { [(y
i+1
– y
i
)
×
(Input – x
i
)] / (x
i+1
– x
i
) } + y
i
@Max Lim = @Min Lim = false.
PARAMETERS DATA TYPE LINKABLE DEFAULT VALUE RANGE
Input Signed Integer Yes 0
±
32767
Smp Val1 – 5 Signed Integer No 0
±
32767
Min Val Signed Integer No 0
±
32767
Max Val Signed Integer No 4
±
32767
@Min Lim Logic Output No — True/False
@Max Lim Logic Output No — True/False
Output Signed Integer No —
±
32767
EXAMPLES EXAMPLE 1 EXAMPLE 2 EXAMPLE 3 EXAMPLE 4
Input 2 14 ±
32767
±
32767
Smp Val1 2 2 16383 16383
Smp Val2 8 8 32767 32767
Smp Val3 4 4 0 0
Smp Val4 12 12 8192 8192
Smp Val5 10 10 – 16383 – 16383
Min Val 0 0 – 16383 – 32767
Max Val 16 16 + 16383 + 32767
@Min Lim 0 0 – 16383 – 32767
@Max Lim 16 16 + 16383 + 32767
Output 5 11 See plot See plot
Examples 1 & 2
2
6
4
2
6 8
10
8
12
Y-Axis
Ex 1 Input
Ex 2 Input
Smp Val5
Smp
Val4
Smp
Val2
Smp
Val3
Smp
Val1
10 12 14 4
Y-Axis coordinate Smp Val1 is located at X-Axis coordinate Min Val.
Y-Axis coordinate Smp Val5 is located at X-Axis coordinate Max Val.
Smp Val2, Smp Val3, & Smp Val4, are located at equal X-Axis coordinates between Smp Val1 & Smp Val5.
FUNCTION interpolates to determine the Y-Axis coordinate of the Input.
16
X-Axis
FUNCTION
(continued)