External Latch Valid - Mitsubishi Electric MELSEC iQ-R Series User Manual

External latch valid

This is a function that arbitrary data is recorded (latch) at the timing of detecting the trigger input signal.
It is possible to latch only the data within the range by setting the data range to latch.
When this function is used, execute MC_TouchProbe. To stop this function, execute MC_AbortTrigger.
When a trigger event occurs, the operation becomes as shown below.
Operation
• Calculations for the latched data are estimated at rising edge/falling edge/both direction of the signal set in TriggerInput
(indicate trigger input signal as follows).
• When it is WindowOnly = TRUE, whether the latch data at trigger event occurrence is within the range or not is confirmed.
Data outside the range are not latched.
• The latch data is stored to the storage location specified RecordedPosition and OutputBuffer according to RecordMode,
and RecordedCounter is updated.
The following shows examples of latch operation by RecordMode.
Ex.
For RecordMode = "0: OneShot"
Trigger input signal
Execute
Busy
Done
RecordedCounter
RecordedPosition
Probe data
LastPosition
FirstPosition
Data outside range are not latched.
12 COMMON FUNCTIONS
364
12.2 Touch Probe
0
PositionData
Confirmation of detection data range
(When the window is valid)
1
Detection value
t
The second detection and later are not latched.