Lenze 8400 TopLine - Manual (Page 1683)

Lenze · 8400 TopLine · Reference manual · DMS 6.0 EN · 06/2014 · TD05/TD14
1683
19 Function library
19.1 Function blocks
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
19.1.171.2 Dead time compensation
The delay time of external switching elements can be compensated by setting the corresponding
delay time in C01062/x . From this input and the current speed ,the FB calculates a preliminary stop,
i.e. the bOut switching output is set correspondingly earlier.
[19-74] Dead time compensation
19.1.171.3 Switching hysteresis
Setting a hysteresis in C01063/x serves to prevent a permanent state change of the bOut switching
output that may be caused by actual position value changes due to a mechanical irregularity at the
axis.
[19-75] Switching hysteresis

Tip!
Please note that a delay time set in
C01062/x shifts the switching points including the
hysteresis.
 Switching performance without dead time compensation
 Switching performance with dead time compensation
 Switching performance of the external switching element (with dead time)
 C01062/1 : Dead time
dnSwitchPoint1_p dn2ndPoint_Size1_p
bOut1*
bOut1
external component
velocity = nActSpeed_v
t
TRUE
TRUE
"ON"
FALSE
FALSE
"OFF"
Œ
0
1
2
CenterMode = FALSE
 C01063/1 : Hysteresis
CenterMode = FALSE CenterMode = TRUE
bOut1
Œ
bOut1
Œ Œ Œ
dnSwitchPoint1_p dn2ndPoint_Size1_p
dnSwitchPoint1_p
dn2ndPoint_Size1_p