Limit switch monitoring

DANGER

Serious injuries caused by moving axes!

The limit switch monitoring in the AX5000 servo drive is purely functional and not suitable for personal protection!

Notwithstanding active limit switch monitoring a fault in the drive system may:

- disable the protection functions of the limit switch

- prevent braking of the axes through EStop and axis stop ramps.

In other words, the axes may not respond. This could cause serious injury.

Before commissioning ensure that all external personal protection measures were applied.

The parameter P-0-0401 enables configuration of two limit switches per axis. For dual-channel devices this parameter is configurable for both channels (A and B).

Limit switch monitoring 1:

Configuration

Limit switch monitoring 2:

Default value: 0 No limit switch

0: No limit switch
No limit switch is configured / available.
1: Normally closed (wire-break protection)
The limit switch is closed if it was not reached by the axis.
2: Normally open
The limit switch is open if it was reached by the axis.

Limit switch reaction

Limit switch monitoring 3:

Default value: 0 E-Stop with a C1D error

0: E-Stop with a C1D error
Braking of the axis with the emergency stop ramp (S-0-0429) and triggering of an error message (FCD0, FCD1). The error is displayed on the AX5000.
1: E-Stop with a C2D warning
Braking of the axis with the emergency stop ramp (S-0-0429) and triggering of a warning (ECD0, ECD1). The error is displayed on the AX5000.
2: Axis halt with a C2D warning
Braking of the axis with the halt ramp (S-0-0372) and triggering of an error message (FCD0, FCD1). The error is displayed on the AX5000.

Input number

Limit switch monitoring 4:

Under this setting in parameter P-0-0401 you can specify which digital input is to be configured with the function „Position limit switch“. You can assign the function to one of eight digital inputs (0-7).

Limit switch monitoring 5:

Configuration of the positive and negative limit switch

The positive and negative limit switch can be configured in parameter P-0-0401. The selectable settings are identical for both limit switch versions and are described in this chapter for the positive limit switch only.