Omron SYSMAC FH Series User Manual page 50

1 Overview
Signal
DSA
GATE
*1. When handshaking is not enabled for output control, the GATE signal will also be turned ON when data is
output from the Sensor Controller. However, when handshaking is disabled for output control during PLC
Link communications, the GATE signal is not even output.
External device
(1) The PLC turns ON the DSA signal and waits for the output data.
(2) The Sensor Controller turns ON the GATE signal when the DSA signal is ON and it is ready to output the
measurement results.
(3) The Sensor Controller turns ON the GATE signal and outputs the output data.
*1. This is when an Output Unit in the measurement flow is performed.
● DSA Signal ON Timing
The DSA signal needs to be turned ON when data is required.
When an Output Unit has been performed and data to output is ready, the Sensor Controller will output
the data when it detected the DSA signal turned ON.
Measurement flow
Start measurement.
Processing items related to results output
Processing item
To output measurement results immediately, issue the measurement trigger and turn ON the DSA sig-
nal. The Sensor Controller does not check the change from OFF to ON of the DSA signal but checks
the ON state. As the measurement results are output from the Sensor Controller to the external device
immediately when the Output Unit is performed, the PLC takes in the output data at once.
Measurement flow
Start measurement.
Processing items related to results output
Processing completed.
1 - 26
Name
Data Output Re-
quest Signal
Data Output Com-
pletion Signal
(1) DSA signal
(3) Measurement results output
*1
DSA (data output request) signal status
OFF
No data output.
ON
DSA (data output request) signal status
OFF
ON
FH/FHV Series Vision System User's manual for Communication Settings (Z342-E1)
Description
This signal is sent by the external device (PLC) to the Sensor
Controller to request data output.
This signal is sent by the Sensor Controller to inform the external
device (PLC) of the timing to load output data. This signal is out-
put only when the DSA signal is ON.
Sensor Controller
(2) GATE signal
Data output started.
Data output started.
*1