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System Description

Commands manual of the command set you are using (native: Lx commands,

GCS: SPA).

NOTE

If the hardware and software limit switch configurations are not compatible, no

motion is possible. PI DC motor stages have active-high limit switches, so SW

7 must be OFF.

3.6 Reference Signal

A position reference switch (sometimes called “origin sensor”) working in

conjunction with the capture mechanism of the motion processor can be used to

provide absolute position information (referencing).

The Mercury™ DC motor controller accepts signals from a direction-sensing

reference switch. That signal is expected to be high when the axis position is on

one side of the reference position and low when the position is on the other side.

See the Commands manual for the command set you are using for a details of

commands which can use the reference signal.

3.7 Input/Output Lines

C-863 Mercury™ controllers offer 4 digital outputs and 4 inputs for either digital or

analog (8-bit resolution) use (see p. 36 for pinout of the I/O socket).

A set of commands is available to handle these I/O lines (for descriptions see the

respective native or GCS Commands manual).

Note that there are commands which allow conditional command execution

depending on the digital and joystick inputs. This makes possible pushbutton

control and/or inter-axis triggering in stand-alone mode, i.e. without a PC

connection.

Physik Instrumente C-863 Mercury User Manual

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