Programmable Logic Controller with RS232/RS485 Communications

The PL410 PLC has been developed as a versatile controller for machine control as a relay replacement product. The fact that the controller is programmable enables the user to program their own unique logic requirements and not be restricted by a pre-programmed unit or hardwired relays and timers. 

The PL410 PLC is programmed in ladder logic. PROCON’s PROSOFT windows-based PC software is used to generate the ladder diagram, compile the program, and then download the program to the PL410 via the programming port on the front of the unit. 

The I/O consists of 8 digital inputs and 4 relay outputs. The inputs are opto-isolated and a built in field supply is used to power the inputs so no external power supply is required. 

All wiring is done with screw terminals on removable connectors. 

The programming port requires the use of a special adaptor to connect it to an RS232 communications port of a PC. This port supports the Modbus RTU protocol and all of the internal registers and I/O status can be accessed through this port. 

The features in the PL410 include a Real Time Clock and 4 PID loops. The PID loops can be tuned manually or automatically using the open loop or closed loop techniques. 

The RS485 communications port can be configured as a Modbus master or Modbus slave.

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