Rockwell-automation 2711P Creating Modbus Applications Instrukcja Użytkownika Pobierz pdf (Strona 11)

11 Publication 2711P-UM002B-EN-P - March 2007

Chapter

Modbus KEPServer Drivers

Objectives

This chapter provides an overview of MODBUS KEPServer drivers

available in the RSView Enterprise software.

• Modbus Master/Slave

– Modbus (RTU) Serial

– Modbus Unsolicited Serial

• Modbus ASCII

• Modbus/TCP

Modbus Master/Slave

A Modbus master/slave network provides a protocol for data transfer

and programming with a single RTU master and up to 247 slave

devices. A Modbus network links distributed devices with a central

computer terminal or controller for supervisory control and data

acquisition. Up to 247 nodes can be connected at data rates of up to

19,200 baud using media such as twisted pair cable, common carrier

phone lines, or microwave transmission. This network is commonly

used in SCADA application over large areas such as the water/waste

water and oil & gas industries.

Modbus (RTU) Serial

Modbus (RTU) Serial is the protocol for a master and includes RTS

support for radio modems. Supported devices include:

• Modbus compatible devices

• Elliott Flow Computer

• Magnetek GPD 515 Drive

• Omni Flow Computer

• Daniel S500 Flow Computer

• Dynamic Fluid Meter (DFM) SFC3

• Instromet

Modbus Unsolicited Serial

Modbus Unsolicited Serial simulates up to 247 Modbus slave devices.

Supported devices include Modbus compatible devices.

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Rockwell-automation 2711P Creating Modbus Applications Instrukcja Użytkownika Strona 11