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Modbus is a serial communications protocol published by Modicon and generally used with PLCs(programmable logic controllers). It has now become a factory standard for communications protocols in industry, and is the most commonly used means of communicating industrial devices. The main reasons for the extensive use of Modbus over other communications protocols are:   It is open source protocol and it’s free.   It is simple to understand, easy to implement.   It moves raw bits or words without placing many restrictions on vendors  Modbus allows for serial communication between many third party devices connected to the same network, for e.g. a system that measures temperature and humidity and communicates the results to a computer or number of VFDs communicating to PLC over a single Modbus serial line.  Modbus is often used to connect a supervisory computer with a remote terminal unit (RTU) in supervisory control and data acquisition (SCADA) systems. Modbus ...

Before performing any communication, it is better to understand the hardware interface of Delta Hmi TP04 series and how to set the communication settings in TPEditor software program. Please refer to the following sections for the method of communication. An external 24V DC power is required when activating TP04 series. After the power is in connected to TP04 series, the start-up display will show up first and then the system main menu of TP04 series will appear. Choose “4.TP SETUP” > “1.Communication Protocol”. There are three items regarding the communication settings: TP Settings: It is used to set the communication address of TP series. RS232: It is used to set the transmission speed (baud rate), data length, parity check, and stop bit of     RS-232 communication. RS485: It is used to set the transmission speed (baud rate), data length, parity check, and stop bit of RS-485 communication. The above three items should be set in accordance with the settings set in T...

Connection between 2 E-Terminals and FX2N PLC.  The required material for the setup is as follows Sr. no. Material 1 PLC            :FX Series 2 CPU             :FX2N 3 HMI           : E1101 ,E1071 4 HMI S/W     :E-Designer Ver: 7.31   Two E-Terminals are connected to FX-2N PLC using MISTU- CAB14A          and MISTU-CAB 6Aa    The required cables are as follows      Sr. no. Item Description 1 MISTU-CAB 6Aa Prog.Cable For E-Terminal And Comm. Cable between E1071 and E-1101 2 MISTU-CAB 14A Comm. Cable for E-Terminal to FX2N PLC   E1101 Program Setting STEP 1: Select Controller FX and FX Series Serial driver for Controller.  Snapshot of Controller 1 Setting in E1101  Put Controlle...