78 Version: 1.2.1 MS249E C-863.12 Mercury Controller
The settings for the configuration of the digital output lines can only be modified in the volatile
memory of the C-863.12. After switching on or restarting the C-863.12 the factory default
settings are active, unless a configuration has already been made using the startup macro.
7.3.2 Configuring the "Position Distance" Trigger Mode
The Position Distance trigger mode is suitable for scanning applications. Once the axis has
moved along the distance that was set with CTO parameter ID = 1 (TriggerStep), a trigger pulse
is output. The pulse width is one servo cycle.
The unit of the distance (TriggerStep) is subject to the settings of parameters 0xE and 0xF.
Default is mm.
1. Configure the digital output line (<TrigOutID>) that is to be used as the trigger output:
− Send CTO <TrigOutID> 2 A, where A indicates the axis to be moved.
− Send CTO <TrigOutID> 3 0, where 0 specifies the Position Distance trigger
mode.
− Send CTO <TrigOutID> 1 S, where S indicates the distance.
2. If you want to activate the conditions for trigger output, send TRO <TrigOutID> 1.
Example:
A pulse on digital output line 1 is output every time the axis 1 of the positioner has covered a
distance of 0.1 µm.
➢ Send:
CTO 1 2 1
CTO 1 3 0
CTO 1 1 0.0001
TRO 1 1
"Position Distance" trigger mode with start and stop values for positive motion
direction of the axis
Optionally, you can define start and stop values for limiting the range and for specifying the
motion direction of the axis (positive or negative).
If start and stop values have the same value, they are ignored.
If the direction of motion is reversed before the axis position has reached the stop value,
trigger pulses continue to be output.
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