PI MS249E - Configuring the Single Position Trigger Mode

7 Operation
82 Version: 1.2.1 MS249E C-863.12 Mercury Controller
Example 1:
The first trigger pulse is to be output on digital output line 1 if the absolute position of axis 1 is
1.5 mm. A pulse should then be output on this line every time axis 1 has covered a distance of
0.1 µm in the positive direction. The last trigger pulse is to be output if the absolute axis
position is 2.5 mm.
➢ Send:
CTO 1 2 1
CTO 1 3 7
CTO 1 1 0.0001
CTO 1 10 1.5
CTO 1 9 2.5
TRO 1 1
Example 2:
The first trigger pulse is to be output on digital output line 2 if the absolute position of axis B is
0.4 mm. A pulse should then be output on this line every time axis B has covered a distance of
1 µm in the negative direction. The last trigger pulse is to be output if the absolute axis position
is 0.1 mm.
➢ Send:
CTO 2 2 B
CTO 2 3 7
CTO 2 1 -0.001
CTO 2 10 0.4
CTO 2 9 0.1
INFORMATION
The velocity setting of the axis must be appropriate for the distance setting (TriggerStep)
commanded by the CTO command. Recommended value:
Maximum velocity = distance * 20 kHz / 2
where 20 kHz is the servo cycle frequency of the C-863.12.
7.3.7 Configuring the "Single Position" Trigger Mode
The selected digital output line is active in Single Position trigger mode, when the axis position
has reached or exceeded a specified position (TriggerPosition).
The unit for TriggerPosition depends on the settings of the parameters 0xE and 0xF. Default is
mm.