Communication Modbus -Compatible MODBUS Master-Slave Communication Rievtech Micro PLCs are compatible with the world’s Modbus* de facto standard and can serve as both Modbus master and slave RTUs, which are ideal for air conditioning or temperature control etc. Modbus is the most popular industrial protocol being used today, for good reasons. It is simple, inexpensive, universal, and easy to use. The Micro PLC can be networked to other Micro PLCs, data input devices (barcode readers, weight scales, etc.), and/or data output devices (serial printers, serial text displays, etc.).
It is also The default device address is 1, but can be configured to any possible to network the Micro PLC to other 3rd party PLCs and desired address via xlogicSoft. devices that have the ability to communicate using the Modbus RTU protocol. * Protocol developed by Modicon Inc., an American company RS232 (USB) Port – Serial COM0 MODBUS Master Command All Micro PLCs have built-in the universal communication port with optional USB or RS232 interface.
USB interface complies with standard functional specification of USB1.1 Besides providing the standard RS232 interface, the universal port also provided USB interface since more and more notebook computers are using USB port to replace COM ports due to light weight and thickness considerations. To connect to the RS232 port, use an RS232 cable with galvanic isolation or USB Cable to connect to USB port of PC. American Standard Code for Information Interchange and defines a RS232 ports are commonly used for interfacing hardware HMI panels and other devices through Modbus RTU/ASCII character encoding method for text that is used in computers and communications. other communication devices).
RS232 Port can be used as a Modbus RTU master or slave With special accessory – PRO-RS485 Cable, the universal port can protocol device, or handle ASCII data In or Out (ASCII stands for serve as RS485 Port. RS232 Cable USB-Cable RS-485 PRO Cable 17 MASTER SLAVE Initiate Request Receive the Response Perform the Action Initiate the Response READ DATA WRITE DATA 01 Read Coils 0x 1x 05 Write Single Coil 02 Read Discrete Input 0x 06 Write Single Register 03 Read Holding Registers 4x 15 Write Multiple Coils 04 Read Input Registers 3x 16 Write Multiple Registers