Rev A Feb 2020
Page 52
Output Trigger Modes
When the
Trig 1 Mode
and
Trig 2 Mode
parameters are configured as outputs, the
TRIG ports can be used as a general purpose digital output, or to indicate motion
status or to produce a trigger pulse at configurable positions as follows:
Digital Output
- General purpose logic output (set using the appropriate server
message).
Trig Out In Motion
- Trigger output active (level) when motor 'in motion'. The output
trigger goes high (5V) or low (0V) (as set in the Trig 1. Polarity and Trig. 2 Polarity
parameters) when the stage is in motion.
Trig Out Max Vel
- Trigger output active (level) when motor at 'max velocity'. The
max velocity limit that generates the trigger is dependent on the type of move
being performed, e.g. jog move, joystick move etc.
Trig Out Pos. Steps Fwd
- Trigger output active (pulsed) at pre-defined positions
moving forward. Only one Trigger port at a time can be set to this mode. See
Trigger Out Position Steps for further details.
Trig Out Pos. Steps Rev
- Trigger output active (pulsed) at pre-defined positions
moving backwards. Only one Trigger port at a time can be set to this mode. See
Trigger Out Position Steps for further details.
Trig Out Pos. Steps Both
- Trigger output active (pulsed) at pre-defined positions
moving forwards and backward. Only one Trigger port at a time can be set to this
mode. See Trigger Out Position Steps for further details.
Trigger Out Position Steps
In the three
Pos. Steps
modes described above, the controller outputs a configurable
number of pulses (set in the
Num. Pulses Fwd
and
Num. Pulses Rev
parameters), of
configurable width (
Trig Pulse Width
), when the actual position of the stage matches the
position values configured as the Start Position and Position Interval (
Start Pos. Fwd/Start
Pos. Rev.
and
Pos Interval Fwd/Pos Interval Rev
). These modes allow external equipment
to be triggered at exact position values.
Using the last three modes above, position triggering can be configured to be
unidirectional (
Trig Out Pos. Steps Fwd
or
Trig Out Pos. Steps Rev
) or bidirectional
(
Trig Out Pos. Steps Both
). In bidirectional mode the forward and reverse pulse
sequences can be configured separately. A cycle count setting (
Num. of Move
Cycles
) allows the uni- or bidirectional position triggering sequence to be repeated a
number of times.
Note
The following output modes can be set to only one trigger at a time. If an attempt is
made to assign one of these modes to both trigger outputs, an error message will be
generated.
Note
If the trigger mode is not set to one of the three position modes described previously,
then the following parameters are not applicable and will be locked.
