User guide

5 Function blocks
5.101 L_LdZeroDetect - zero crossing detection
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Lenze · 9400 function library · Reference manual · DMS 6.7 EN · 08/2014 · TD05
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5.101 L_LdZeroDetect - zero crossing detection
This FB observes a clocked position and detects zero crossings.
• The cycle and shift factor for the position resolution are read out of the machine parameters
(AxisData).
Inputs
Outputs
Function library: LenzeLineDrive
Runtime software licence:  Motion Control HighLevel  Motion Control TopLevel
Identifier/data type Information/possible settings
dnPosIn_p
DINT
Clocked position in [inc]
AxisData Machine parameters
• For accepting the machine parameters of the drive/motor, connect this input
with the output DI_AxisData of the SB LS_DriveInterface.
• The machine parameters of a master drive can be displayed with the
FB L_SdSetAxisData
. In this case, the FB output AxisData must be connected to
this input. ( 510)
Identifier/data type Value/meaning
dnState
DINT
Status (bit coded)
bits10 Zero crossing active
Bit15 Error
bits18 No cycle available
bits21 Input error (e.g. impermissible position jump or inverse direction of
motion)
bits23 No valid axis data structure
bZero
BOOL
Status signal "Zero crossing"
TRUE Zero crossing detected or position = "0"
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