Lenze 8400 HighLine - Manual (Page 1274)

17 Function library
17.1 Function blocks
1274
Lenze · 8400 HighLine · Referenzhandbuch · DMS 10.0 EN · 06/2014 · TD05/TD14
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17.1.28.2 Function 2: dnIn1 > dnIn2
This function serves, for instance, to implement the comparison "actual speed is higher than a limit
value" (n
act
> n
x
) for one direction of rotation.
[17-14] Function 2: Switching performance
Functional sequence
1. If the value at dnIn1_p exceeds the value at dnIn2_p, bOut changes from FALSE to TRUE.
2. Only if the signal at dnIn1_p falls below the value of dnIn2_p - hysteresis again, bOut changes
back from TRUE to FALSE.
[17-15] Function 2: Example
 C001671 : Hysteresis
TRUE
FALSE
bOut
dnIn2_p
dnIn1_p
Œ
 C001671 : Hysteresis
dnIn1_p
dnIn2_p
TRUE
FALSE
bOut
t
t
Œ