ASTECH LDM41A - DX - Distance Tracking with Target Board (50 Hz); DF - Distance Measurement with External Trigger

LDM41A and LDM42A Manual Commands and Parameter
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8.5 DX – distance tracking with target board (50 Hz)
Input parameter SA, SD, SE, SF, OF
Output RS232/RS422, digital switching output, analog output
DX mode performs at a steady measuring rate of 50 Hz (only LDM42A). As a
necessary precondition for measured values to be stable, a white target board
must be placed at the selected object.
This measurement mode is intended in the first place for objects performing
homogeneous motion up to 4m/s. For higher rates of measurement,
preceding measured values will be included in the process to calculate a
currently measured value. There must be no sudden jumps in distance greater
than 16 cm within the measuring field!
Caution: To prevent transmission problems, please use 9600 baud
as the minimal baud rate for DX Mode!
8.6 DF – distance measurement with external trigger
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Input parameter SD, SE, SF, ST, OF, TD, ST, SA, RM
Output RS232/RS232, digital switching output, analog output
DF mode allows a measurement that is triggered by an external trigger pulse.
Initially, after selecting this mode, the operator does not receive any response.
As soon as the trigger pulse has been detected, the LDM41A and LDM42A will
send data and switches to digital and/or analog output.
Settings for trigger delay (delay) and trigger slope can be defined via
parameter TD (see 8.22 TDx y – display/set trigger delay trigger level).
With ST=1 the maximum trigger frequency should not exceed 3.5 Hz.
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Trigger function is not available for devices with internal heating (LDM41A-h and LDM42A-h)