Frequency Converters and Their Use for Remote Control
When choosing a frequency converter, buyers often pay attention to the price; however, it is important to remember that the cost depends on functional capabilities. Budget models usually lag behind quality converters from leading manufacturers in reliability, usability, installation, and other parameters. One important aspect is the ability to remotely control the electric drive.
Before selecting a specific frequency converter, it is essential to consider that proper usage requires configuration, which should take into account the characteristics of individual mechanisms. Remote control from a panel at distances of hundreds of meters allows an operator at large enterprises to monitor all processes from a single control point. That is why converters equipped with remote control capabilities have a higher cost.
Advantages of Using an Integrated RS-485 Port
Thanks to the presence of an RS-485 port in the frequency converter, the possibility of connecting external devices arises, which are capable of changing the working parameters of the converter at significant distances using hardware-software protocols such as:
- DeviceNet
- Modbus
- Profibus
Many manufacturers of frequency converters also offer software that allows for controlling the electric drive from a computer via a local network or the Internet. This significantly increases the distance between the drive and the control station to several kilometers.
Importance of Software and Service Personnel
Personnel experienced in using the button panel of frequency converters can take advantage of a specially designed simulator program for the computer. Data transfer between the computer and the converter occurs via the RS-485 port.
To organize remote monitoring and control of the electric drive, it is necessary to have a computer, as well as an industrial controller and a communication module to ensure connection with standard protocols.
Recommendations When Choosing a Frequency Converter
Therefore, when selecting a frequency converter, it is important to pay attention to:
- Configuration (various modules, additional software);
- Supported information exchange protocols;
- Calculation of costs for acquisition, installation, and connection.