NAME

       svd-ps_vfd - HAL userspace component for SVD-P(S) VFDs

SYNOPSIS

       svd-ps_vfd [OPTIONS]

DESCRIPTION

       The svd-ps_vfd component interfaces a Soyan Power SVD-P(S) VFD to the LinuxCNC HAL. The
       VFD is connected via RS-485 to the LinuxCNC computer.

       The SVD-P(S) VFDs are also sold under the LAPOND brand.

HARDWARE SETUP

       The SVD-P(S) VFDs do not come with a Modbus daughterboard by default, it needs to be
       purchased separately.

FIRMWARE SETUP

       The sad-ps_vfd component uses standard Modbus protocol communication which requires that
       one parameter be changed from the default settings:

       PD-05 = 1 (Standard Modbus protocol)

       The following settings have been tested successfully and are the default per Soyans
       documentation:

       PD-00 = 6005 (9600 baud)

       PD-01 = 0 (8N2)

       PD-02 = 1 (Slave address)

       PD-03 = 2 (Response delay)

       PD-04 = 0 (Communication timeout)

       PD-06 = 0 (Current resolution)

OPTIONS

       -b, --bits N
           (default 8) For Modbus communication. Set number of data bits to N.  N must be between
           5 and 8 inclusive.

       -p, --parity [Even,Odd,None]

           (default None) For Modbus communication.  Set serial parity to Even,
           Odd, or None.

       -r, --rate N
           (default 9600) For Modbus communication. Set baud rate to N. It is an error if the
           rate is not one of the following: 1200, 2400, 4800, 9600, 19200, 38400

       -s, --stopbits [1,2]
           (default 2) For Modbus communication. Set serial stop bits to 1 or 2.

       -t, --target N
           (default 1) For Modbus communication. Set Modbus target (slave) number. This must
           match the device number you set on the Huanyang GT VFD.

       -d, --device PATH
           (default /dev/ttyS0) For Modbus communication. Set the name of the serial device node
           to use.

       -v, --verbose
           Turn on verbose mode.

       -S, --motor-max-speed RPM
           The motor’s max speed in RPM.

       -F, --max-frequency HZ
           This is the maximum output frequency of the VFD in Hz.

       -f, --min-frequency HZ
           This is the minimum output frequency of the VFD in Hz.

PINS

       svd-ps_vfd.period (float, in)
           The period for the driver’s update cycle, in seconds. This is how frequently the
           driver will wake up, check its HAL pins, and communicate with the VFD. Must be between
           0.001 and 2.000 seconds. Default: 0.1 seconds.

       svd-ps_vfd.speed-cmd (float, in)
           The requested motor speed, in RPM.

       svd-ps_vfd.speed-fb (float, out)
           The motor’s current speed, in RPM, reported by the VFD.

       svd-ps_vfd.at-speed (bit, out)
           True when the drive is on and at the commanded speed (within 2%), False otherwise.

       svd-ps_vfd.freq-cmd (float, out)
           The requested output frequency, in Hz. This is set from the .speed-cmd value, and is
           just shown for debugging purposes.

       svd-ps_vfd.freq-fb (float, out)
           The current output frequency of the VFD, in Hz. This is reported from the VFD to the
           driver.

       svd-ps_vfd.spindle-on (bit, in)
           Set this pin True to command the spindle on, at the speed requested on the .speed-cmd
           pin. Set this pin False to command the spindle off.

       svd-ps_vfd.output-voltage (float, out)
           The voltage that the VFD is current providing to the motor, in Volts.

       svd-ps_vfd.output-current (float, out)
           The current that the motor is currently drawing from the VFD, in Amperes.

       hsvd-ps_vfd.output-power (float, out)
           The power that the motor is currently drawing from the VFD, in Watts.

       svd-ps_vfd.dc-bus-voltage (float, out)
           The current voltage of the VFD’s internal DC power supply, in Volts.

       svd-ps_vfd.modbus-errors (u32, out)
           A count of the number of modbus communication errors between the driver and the VFD.
           The driver is resilient against communication errors, but a large or growing number
           here indicates a problem that should be investigated.

       svd-ps_vfd.input-terminal (float, out)
           The VFD’s input terminal register.

       svd-ps_vfd.AI1 (float, out)
           The VFD’s AI1 register.

       svd-ps_vfd.AI2 (float, out)
           The VFD’s AI2 register.