Lenze 931E/K Small Drives Control - Manual (Page 141)

Appendix
Parameterisation of outside motors
Limit switch settings
10
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141 SW−HB 13.0002−EN 4.1
10.1.5 Limit switch settings
The 931E/K servo positioning controller supports both limit switches with normally closed
and normally open contacts.
When selecting the drive settings, ensure that both limit switches are inactive when the
drive is in the permissible positioning range. The LEDs in the below menu must be inactive.
For this, click NC contact (DIN7, DIN8 = +24 V
→ setpoint enabled) or NO contact (DIN7,
DIN8 = +24 V
→ setpoint inhibited).
931e_296
The little graph in the middle uses a red arrow to show that the drive traverses towards a
limit switch. In this way, you can directly see the limit switch assignment to the traversing
direction and can adapt the wiring of the limit switches, if necessary.
As long as a limit switch is active, the setpoint in the corresponding direction of rotation
will be inhibited. In applications, in which a limit switch overrun or bouncing limit switches
are possible, we recommend to activate the option Limit switch inhibits direction
permanently. When this option is activated, the direction of rotation in which a limit
switch has been activated will remain inhibited, even after the limit switch has been left.
In this case, it is possible to retract from the limit switch, but the drive cannot once again
traverse in the direction of the limit switch. The inhibited direction of rotation will only be
released again, when controller enable is deactivated.