Communicating With An External Device - Omron FQ2-S Series User Manual

1-2 Communicating with an External Device

FQ2-S1 FQ2-S2
This section gives the communications specifications, describes the control methods that you can use for
communications, and describes the settings that are required before starting communications with an external
device.
Basic Control Operations of the Sensor
The following figure shows basic communications between an external device and the Sensor and the flow of
signals and data.
Trigger sensor
Measurement
triggers and other
control commands
PLC
are input.
The following methods can be used to exchange data between an external device and the Sensor.
Commands That Can Be Input to the Sensor from an External Device
Type
Control com- Control signals
mands (input signals)
Communications
command input
Data Output to an External Device from the Sensor
Type
Status signals
Overall judgement
Measured values
10
Communicating with an External Device
FQ2-S3 FQ2-S4 FQ2-CH
Sensor
Description
A measurement is executed when a measurement trigger (i.e., an ON TRIG sig-
nal) is input.
For information on control signals, refer to
Status Signals: p.18.
Various commands can be executed, such as measuring commands and scene
change. The communications commands depend on the communications proto-
col that you use. Refer to the section for each communications protocol for details.
Description
When the Sensor confirms a control signal or communications command input
and begins measurement processing, the status of the Sensor is reported to the
external device through status signals (e.g., a BUSY signal).
For information on status signals, refer to
Status Signals: p.18.
NG is output whenever there is one or more NGs in the judgement results for mul-
tiple inspection items.
The overall judgement can be output through the OR signal or through the JG out-
put parameter.
*1: This behavior can be changed in the settings.
For information on the OR signal, refer to
nals: p.18.
For information on the JG output parameter.
The measured values from inspection items can be output. The output items must
be inspection items for output and registered as output data (data 0 to data 31).
Refer to the following for details.
Settings Required for Data Output: p.61, 97, 124, 148, 169, 198.
You can also use commands to obtain results after a measurement is performed.
The measurement
results are output.
• Status signals
• Overall judgement
• Measured values
• Character strings
Control with Control Signals and
Control with Control Signals and
*1
Control with Control Signals and Status Sig-
PLC
FQ2-S/CH User's Manual
for Communications Settings