Rockwell Automation 1336E IMPACT Adjustable Frequency AC Drive User Manual V 1-4.XX - Manual (Page 194)

10-24 Using the Function Block
Figure 10.27
Hysteresis Function Block
The hysteresis function provides a band in which the output value
does not change. For example, if an input value is greater than
Input 4, the output value is Input 2. As the input value decrease, the
output value remains Input 2 until the input value is less than Input 5.
Refer to Figure 10.28.
Figure 10.28
Hysteresis
200 Func 1 Eval Sel
0 – 17
198 Function In1
199 Func 1 Mask/Val
I
V
Hysteresis Function Block
203 Func 2 Eval Sel
0 – 17
201 Function In2
202 Func 2 Mask/Val
I
V
212
Function Sel
In1
In2
206 Func 3 Eval Sel
0 – 17
204 Function In3
205 Func 3 Mask/Val
I
V In3
207 Function In4
208 Function In5
In4
In5
213
Function
Output 1 If: Then:
In1 > In4 In2 —> Out 1
In1 < In5 In3 —> Out 1
In5 < In1 < In4 No change
14
Hysteresis
Band
(No Change)
In 3
In 2
In 2
In 4
Output Values
In 2
In 3
In 3
In 5