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Controlling Operation and Outputting Data with a Parallel Interface Sensor Data Unit FQ2-S4 User’s Manual
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Controll
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Reading Data When the GATE Signal Is Output (No Handshaking)
The Sensor will output the measurement results without synchronizing with the external device, but the GATE
signal is also output.
The GATE signal is used to control the timing of when the external device reads the measurement data.
Adjust the external device so that it reads the measurement results when the GATE signal is output.
*1 You can change the settings of when the GATE signal is turned ON after the measurement data is output and the length of time that the
GATE signal will remain ON.
Setting the Output Timing fo the GATE Signal: p. 308
Item Parameter Description
Output control None (default), Hand-
shaking, or Sync. Out-
put None: Measurement results are output without synchronizing with the external device.
Handshaking: Measurement results are output while synchronizing with the PLC.
Sync. output: Measurement results are output without synchronizing with the external
device.
Output period 2.0 to 5,000.0 ms
10.0 ms (default) This setting is enabled only when the [Output control] parameter is set to [None].
Set the period for outputting measurement results.
Set a value that is longer that the GATE ON delay plus the output time and shorter than the
measurement interval.
If you set a value that is longer than the measurement interval, the output timing will
become delayed as measurements are repeated.
GATE ON delay 1.0 to 1,000.0 ms
1.0 ms (default) Set the time from when the result is output to the parallel interface until the GATE signal
turns ON.
This is the time to wait until the data output stabilizes.
Set a value that is longer than the delay time of the external device.
Output time 1.0 to 1,000.0 ms
5.0 ms (default) This setting is enabled only when the [Output control] parameter is set to [None] or [Sync.
output].
Set the time to turn ON the GATE signal.
Set the time that is required for the external device to read the measurement results.
Timeout 0.5 to 120.0 s
10.0 s (default) This setting is enabled only when the [Output control] parameter is set to [Handshaking].
A timeout error will occur at the following times if there is no response from the external
device within the time that is set.
When the DSA signal turns ON after measurements are completed
When the DSA signal turns OFF after the GATE signal turns ON
When the DSA signal turns ON after the GATE signal turns OFF
Number of delay 1 to 15 (default) This setting is enabled only when the [Output control] parameter is set to [Sync. output].
Set the number of times to ignore the STEP signal turning ON between when the STEP
signal turns ON and the measurement results are output.
The GATE signal will not be output if there is no data set for parallel judgement output and parallel data output.
If only the OR signal is output, read the OR signal when the BUSY signal turns OFF.
External device
FQ2
(2) GATE signal
*1
(1) Measurement processing
and results output (OR and
D0 to D15)
Note