About

Vfdmod is a LinuxCNC user space component designed to control any VFD that supports standard MODBUS RTU protocol.

Features

• Setting command speed with MODBUS function codes 0x06 (write holding register) and 0x10 (write multiple holding registers).
• Setting control word with MODBUS function codes 0x06, 0x10, 0x05 (write coil) and 0x0F (write multiple coils).
• Reading any count of user defined parameters with MODBUS function codes 0x01 and 0x03.
• Four types of user defined parameters are supported: bit, float, s32 and u32.
• Built-in PyVcp generator.
• RS485 connection state monitoring including total error count and last error code.
• Auto reconnection attempts when USB-to-RS485 adapter was physically re-plugged.
• Huanyang VFDs are not supported because they use non-standard MODBUS function codes.

Screenshots

Documentation

See vfdmod wiki: https://github.com/aekhv/vfdmod/wiki

Downloads

Latest DEB-packages: https://github.com/aekhv/vfdmod/releases

Support

English support forum: https://forum.linuxcnc.org/

Russian support forum: http://www.cnc-club.ru/

History

Vfdmod 0.3.2:

• User defined HAL pins may be boolean (bit type):
  • Function code 0x01 (read coils) supported.
  • Function code 0x03 (read holding registers, used by default) may be used to get any single bit within returned 16-bit data.

Vfdmod 0.3.1:

• Function codes 0x05 (write single coil) and 0x0F (write multiple coils) are supported.
• PyVcp generator: fault reset button fixed.
• Blank config file now includes all parameters and short description of each.

Vfdmod 0.3.0:

• Reconnection feature added, it's useful when serial device has been re-attached.
• Fault reset added.
• Function codes 0x06 (write single register) and 0x10 (write multiple registers) are supported.

Vfdmod 0.2.0:

• PyVcp generator added.

Vfdmod 0.1.0:

• First release.