Controlling Operation and Outputting Data with RS-232C No-protocol Communications
FQ2-S/CH User’s Manual
for Communications Settings
197
4
Controlling Operation and Outputting Data with an
RS-232C Connection
4-2
Controlling Operation and Outputting Data with RS-232C No-protocol Communications
FQ2-CH
Communications Processing Flow
If you connect an RS-232C Interface Sensor Data Unit to the Vision Sensor, you can use no-protocol
communications between an external device (such as a PLC) and the Vision Sensor to perform control from
the external device via command/response communications or to output data after measurements.
You can use these communications methods simultaneously.
Control by command/response is accomplished by issuing ASCII text commands (example: “MEASURE” for
single measurement) from the external device (PLC, etc.). The Vision Sensor returns a response such as “OK”,
“NG”, or values.
Data output by the data output method after measurement is in ASCII format or binary format, and is sent to the
external device (PLC, etc.) serially. There is no handshake to determine whether the external device (PLC, etc.)
is ready to receive the data.
Setting Up No-protocol Communications
Initial Settings for No-protocol Communications
To perform no-protocol communications with RS-232C, you must set the communications baud rate, data
length, and other RS-232C communications parameters.
[Sensor settings] − [Data output] − [No-protocol data]
1 Press [Communication type] − [No protocol (RS-232C)].
2 Set the RS-232C communications parameters.
Item Description Parameter
Baud rate [bps] Set the baud rate to use for RS-232C communications.
Set the same baud rate as the external device that you will communi-
cate with.
2400, 4800, 9600, 19200,
38400, 57600, or 115200
(default: 38400)
Data length [bits] Set the same data length as the external device that you will communi-
cate with.
7 bits or 8 bits
(default: 8 bits)
Parity Sets the parity. Set the same setting as the one in the PLC communica-
tions specifications.
None, Odd, or Even (default:
none)
Stop bit Set the number of stop bits. Set the same value as the one in the PLC
communications specifications.
1 bit or 2 bits (default: 1 bit)
Flow control Controls the flow of communications with the software. None or Xon/Xoff (default:
none)
Delimiter Set the delimiter to add to the end of commands and responses.
Set the same delimiter as the external device that you will communicate
with.
CR, LF, or CR+LF (default:
CR)
If you connect to an OMRON PLC, set the PLC to Host Link com-
munications.
FQ2-S_CH_comm.book 197 ページ ２０１４年６月２６日 木曜日 午前１１時４７分
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