Rockwell Automation 1336T Function Block Prog. Manual, Series A/B - Manual (Page 81)

Function Block Library 4–19
1336 FORCE — 5.9 August 1995
FILTER
BLOCK TYPE 8 decimal 8 hexadecimal
Filter
ID = Exec =
Out
NODE 0 In
NODE 1 Rad /S
NODE 2
DEFINITION
A first order low pass algorithmic filter with a programmable
bandwidth in increments of .1 radians/second.
INPUTS
In — The signed integer to be filtered.
Rad/S — The bandwidth in .1 radians/second, with a maximum
value of 400 (40 radians).
OUTPUT
Out — A signed, filtered, output integer that is clamped to
±
32767.
FUNCTION
If Rad/S = 0, then Out = In.
If Rad/S
≠
0, then Out = Out
I–1
+ k(In – Out
I–1
).
PARAMETERS DATA TYPE LINKABLE DEFAULT VALUE RANGE
In Signed Integer Yes 0
±
32767
Rad/S Unsigned Integer No 0 0 to 400
Out Signed Integer No —
±
32767
Example 1 — (10) Radians-per-Second — Horizontal Scale = 100 mS/Division
" 1 Time A
Constant
≈ 63%
≈ 100 mS
+ 32767 "
– 32767 "
FILTER In "
A––– 3 Time Constants –––"
≈ 96% ≈ 300 mS
A FILTER Out