For related system and data transfer with external equipment and third party devices, serial communication has long been the established connection method. Serial communication allows the FX Series to connect both efficiently and reliably with other PLCs, sensor, printers, and modems, etc. Multi drop networks , non-protocol communication, and remote maintenance are just some of the many uses.
Modbus
Both an open network and a serial communicator, Modbus-RTU allows FX3 series PLCs to interface with a wide range of equipment and devices. Using RS-485 and RS-232, the FX3U-485ADP-MD and FX3U-232ADP-MB expand the networking capabilities of the FX system while still supporting general communication with other FX systems, non-protocol devices, and serial modems.
Modbus serial communication parameters and communication execution are setup easily within the ladder program using GX Works2 or GX Developer, and the FX Modbus Master uses the special ADPRW instruction to communicate with up to 16 Slave stations.
Serial Communication
FX3U-232-BD
FX3U-485-BD
FX3G-485-BD
FX3G-232-BD
FX2NC-232ADP
FX2NC-485ADP
Modbus
FX3U-232ADP-MB
FX3U-485ADP-MB
Communications Protocols
N:N Network
Connect up to 8 FX PLCs using N:N Networking to allow
data exchange between each station.
Computer Link (Dedicated Protocol)
1:N Computer to PLC Communication with a network of up to 16 FX, A, and Q PLCs
1:1 RS-232 Communication Equipment to PLC When communicating over an RS-232 interface, the PC can communicate with one FX PLC.
Parallel Link
Auxiliary Relays (M) and Data Register (D) are update automatically between two PLCs of the same series
Remote Maintenance
Using a modem connection, a PC an monitor/force devices and perform program upload/download to a PLC from remote locations
Non-Protocol Communication is possible between a PLC and any external equipment with an RS -232C or RS-485 (RS-422) interface
