Omron PLC Center

The System of VFD which abbreviate from variable frequency drive generally consists of
an AC motor, a device controller and an operator interface.

How to communicate with variable frequency drive of PLC unit?

Most VFD have a digital, analog and communication interface, you can use to exchange with a remote control.

Digital signals are Start, Stop, Rotation CW, CCW Rotation, Jog, Speed Set 1
Set Speed 2 (this can drive the speed parameter), management status, alarms .
Analog signals are the reference speed, speed feedback, current, voltage, DC voltage, bus, RTD feedback .
Communication bus of the digital and analog signals via Modbus, Profibus-DP, Ethernet / IP,
ControlNet, and many others, depending on the manufacturer.
And let SNCE multiple connections, you will save a lot on the cable, one cable run many nodes PLC

We come to try to understand the VFD system before continue to read more in PLC interface with VFD. (more…)

Tags: energy savings variable frequency drives, Ethernet Communication, industrial, medium voltage variable frequency drive, plc, variable frequency ac drives, variable frequency drive circuit, variable frequency drive controller, variable frequency drive inverter, variable frequency drive manufacturers, variable frequency drive pumps, VFDenergy savings variable frequency drives, Ethernet Communication, industrial, medium voltage variable frequency drive, plc, variable frequency ac drives, variable frequency drive circuit, variable frequency drive controller, variable frequency drive inverter, variable frequency drive manufacturers, variable frequency drive pumps, VFD

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This information hasn’t attack or partial with products and company but we presents information for your benefit.
In automation, there is no standard for communication today.
Each manufacturer uses its own protocol. Now start with TCP / IP as a means of exchanging data.
They developper to the design of protocols based on TCP. I do not know what one will be widespread. One criteria for openness.
Before comparison between Modbus/TCP,Ethernet/IP and ProfiNet ,we should be to understand for each communication standards.
PROFINET is the open Industrial Ethernet standard of PROFIBUS and PROFINET International (PI) for automation. PROFINET uses TCP / IP and IT standards and are, in reality, real-time Ethernet.

The Profinet concept is modular, so users can freely choose overlapping functions. They differ primarily because of the nature of the exchange of data with the sometimes very high speed. (more…)

Tags: Ethernet Communication, Ethernet/IP, Modbus/TCP, plc, ProfiNetEthernet Communication, Ethernet/IP, Modbus/TCP, plc, ProfiNet

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