Introduction - Omron FQ2-S4 User Manual

9-1 Introduction

With the FQ2, you can use any of the following protocols to transfer data through Ethernet.
Protocol
TCP no-protocol commands
FINS/TCP no-protocol commands
*1
PLC Link
*2
EtherNet/IP (tag data links)
*1 A PLC Link uses three link areas to perform communications: the Command Area, Response Area, and Data Output Area.
A PLC Link is not the same as the Serial PLC Link protocol used to connect PLCs together with serial communications.
*2 The signal timing is equivalent to parallel I/O, i.e., command execution and data output are performed independently.
Note
You can also use the parallel interface for other controls, such as controlling measurements, changing scenes, clear-
ing errors, and clearing measurement values.
If a Parallel Interface Sensor Data Unit is mounted, you can output the judgement results of judgement conditions,
the measurement values from measurement items, and the results of expressions through the parallel interface.
8-2 Controlling Operation and Outputting Data with a Parallel Interface Sensor Data Unit: p. 302
If an RS-232C Sensor Data Unit is mounted, you can transfer data through an RS-232C connection using TCP no-
protocol commands.
10. Connecting with RS-232C: p. 445
328

Introduction

Transfer method
Commands are sent from the PLC to control the Sensor.
Received data is stored in the buffer memory of the specified port.
You can control the Sensor and obtain measurement results simply by
manipulating bits and words in the memory of the PLC.
When you turn ON the Command Execution Bit at a specific memory
address in the PLC, a command in a specified memory area (e.g., the
DM Area or CIO Area) in the PLC is read and sent to the Sensor.
The results of executing the command are written to specified words in
the memory of the PLC. These words are specified in advance.
You can use this method when the external device is a PLC.
Reference
p. 401
p. 430
p. 372
p. 329
FQ2-S4 User's Manual