Omron FQ2-S/CH Series User Manual page 71

Note
The ERROR signal will turn ON if the input command is not executed normally.
Set at least one data output for parallel judgement output and then read the OR signal when the GATE signal turns
ON.
Outputting Measurement Results for Data Send Requests from the External Device (Handshaking)
With handshaking, measurement results are output after there is a data send request (DSA signal) from the
external device.
Handshaking is effective for sequentially outputting many measurement results and it is a reliable way to
transfer data.
*1 The overall judgement (OR) is output even if the DSA signal is not output by the external device.
 DSA Signal
The DSA signal is used by the external device to request the next data transmission. The Sensor will not output
data until the DSA signal is turned ON. When the external device is ready for reception, turn ON the DSA
signal.
 Timing Chart
Example: Three Data Items Set for Parallel Data Output
FQ2-S/CH User's Manual
for Communications Settings
External device
(1) DSA signal sent.
Controlling Operation and Outputting Data with a Parallel Interface Sensor Data Unit
FQ2
(2) Measurement
*1
results output.
69