Probe unit (functionality)
A probe unit is a hardware-oriented functional group that can store the actual axis position for a parameterizable event. The event may be an edge of a digital input in the drive, for example. The position is stored immediately without significant delay for subsequent evaluation by the control system.
The probe unit of the drive can be used for event-controlled position detection via the user program „MC_TouchProbe“. An additional application is logging of a reference position during homing („MC_Home“), if the NC referencing mode is set to „Hardware latch“.
In any case, the probe unit has to be parameterized before it can be used. The following configuration refers to an AX5000 servo drive (SoE). More generally, it can also be used for parameterization of a SERCOS drive.
SERCOS parameters
Parameter | Value | EtherCAT Transition (Startup) | Description |
|---|---|---|---|
S-0-0303 | 405 | P -> S | Allocation of real-time Control bit 2 |
S-0-0307 | 409 or 410 | P -> S | Allocation of real-time Status bit 2 |
S-0-0169 | 1, 2, 3 | P -> S | Probe control parameter |
S-0-0170 | 3 | S -> O | Probing cycle procedure command |
Process data – cyclic data between drive and NC axis
Parameter | Description |
|---|---|
S-0-0130 | Probe value positive edge |
S-0-0131 | Probe value negative edge |