Omron FQ2-S Series User Manual

Control Methods Using an External Device
FQ2-S/CH User’s Manual
for Communications Settings
31
1
Overview of Communication Specifications
Receiving Divided Output Data (Using EtherNet/IP)
In EtherNet/IP, if the data size of the set output data exceeds the data size that the Sensor can actually output
in one cycle (256 bytes), the data is divided and output over multiple cycles.
In this case, use handshaking as shown below to receive the multiple cycles of output data.
Example: EtherNet/IP Communications with Handshaking
1 When the first data is received, the user (PLC) turns ON the measurement trigger and the DSA
signal.
2 The Sensor turns ON the GATE signal when the DSA signal is turned ON and outputs the first
data.
3 The user (PLC) turns OFF the DSA signal again when the GATE signal turns ON. Then, the user
(PLC) confirms the output data received in the PLC Data Output Area and moves the received
data to another area in PLC I/O memory.
4 The Sensor confirms that the DSA signal is OFF and automatically turns OFF the GATE signal.
5 When reception of the output data is completed and the GATE signal turns OFF, the user (PLC)
turns on the DSA signal again and waits for the second cycle of data which could not be sent in
the first cycle and was divided.
6 When the second data is output, the second data output is received when the GATE signal is
turned ON and steps 3 and 5 above are repeated.
Steps 3 through 5 above are repeated for all subsequent data output items.
Wait for the first cycle
of output data.
Measurement trigger
(e.g., TRIG signal) ON
Data Output Request
(DSA) signal
Result Completion
(GATE) signal
Output data
(DATA 0 to 7)
Wait for the second
cycle of output data.
ON
OFF
ON
OFF
ON
OFF
(2) (3) (4)(1)
First cycle of
output data
(256 bytes)
Second cycle of
output data
FQ2-S_CH_comm.book 31 ページ ２０１４年６月２６日 木曜日 午前１１時４７分

Omron FQ2-S Series Specifications

General

Brand	Omron
Model	FQ2-S Series
Category	Security Camera
Language	English