Lenze 8400 - Retracting of an Operated Limit Switch

Lenze · 8400 HighLine · Reference manual · DMS 12.0 EN · 06/2017 · TD23 581
8 Basic drive functions (MCK)
8.7 Manual jog
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8.7.3.2 Retracting of an operated limit switch
If control bit 7 (ReleaseLimitSwitch) in the MCK control word is set, retracting from an operated limit
switch is possible. Traversing is carried out in the corresponding retracting direction until the limit
switch is not longer operated.
• If a direction preselection is made for retracting by means of control bit 4/5
(ManJogPos/ManJogNeg) in the retracting direction, travelling is continued, even after the limit
switch has been left, until the corresponding control bit is reset.
• If, instead, a direction preselection is made against the retracting direction, the drive remains at
a standstill.
 Tip!
A limit switch that is in the operated state can also be moved away from again through
manual jogging in the retracting direction by means of control bits 4/5
(ManJogPos/ManJogNeg).
 Note!
Retracting from a limit switch is only possible if this switch is still in the operated state,
i.e. the corresponding limit switch input is still active. You must therefore make sure
that, when travelling to a limit switch, its tripping mechanism is not "driven over" due to
e.g. an excessively high mass or too much momentum so that the limit switch is no
longer in the operated state as a result.