GS2 VFD Driver

-b or --bits <n> (default 8) Set number of data bits to <n>, where n must be from 5 to 8 inclusive

-d or --device <path> (default /dev/ttyS0) Set the name of the serial device node to use

-g or --debug Turn on debugging messages. This will also set the verbose flag. Debug mode will cause all modbus messages to be printed in hex on the terminal.

-n or --name <string> (default gs2_vfd) Set the name of the HAL module. The HAL comp name will be set to <string>, and all pin and parameter names will begin with <string>.

-p or --parity {even,odd,none} (default odd) Set serial parity to even, odd, or none.

-r or --rate <n> (default 38400) Set baud rate to <n>. It is an error if the rate is not one of the following: 110, 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200

-s or --stopbits {1,2} (default 1) Set serial stop bits to 1 or 2

-t or --target <n> (default 1) Set MODBUS target (slave) number. This must match the device number you set on the GS2.

-v or --verbose Turn on debug messages.

-A or --accel-seconds <n> (default 10.0) Seconds to accelerate the spindle from 0 to Max RPM.

-D or --decel-seconds <n> (default 0.0) Seconds to decelerate the spindle from Max RPM to 0. If set to 0.0 the spindle will be allowed to coast to a stop without controlled deceleration.

-R or --braking-resistor This argument should be used when a braking resistor is installed on the GS2 VFD (see Appendix A of the GS2 manual). It disables deceleration over-voltage stall prevention (see GS2 modbus Parameter 6.05), allowing the VFD to keep braking even in situations where the motor is regenerating high voltage. The regenerated voltage gets safely dumped into the braking resistor.

<n>.DC-bus-volts (float, out) The DC bus voltage of the VFD

<n>.at-speed (bit, out) when drive is at commanded speed

<n>.err-reset (bit, in) reset errors sent to VFD

<n>.firmware-revision (s32, out) from the VFD

<n>.frequency-command (float, out) from the VFD

<n>.frequency-out (float, out) from the VFD

<n>.is-stopped (bit, out) when the VFD reports 0 Hz output

<n>.load-percentage (float, out) from the VFD

<n>.motor-RPM (float, out) from the VFD

<n>.output-current (float, out) from the VFD

<n>.output-voltage (float, out) from the VFD

<n>.power-factor (float, out) from the VFD

<n>.scale-frequency (float, out) from the VFD

<n>.speed-command (float, in) speed sent to VFD in RPM It is an error to send a speed faster than the Motor Max RPM as set in the VFD

<n>.spindle-fwd (bit, in) 1 for FWD and 0 for REV sent to VFD

<n>.spindle-rev (bit, in) 1 for REV and 0 if off

<n>.spindle-on (bit, in) 1 for ON and 0 for OFF sent to VFD

<n>.status-1 (s32, out) Drive Status of the VFD (see the GS2 manual)

<n>.status-2 (s32, out) Drive Status of the VFD (see the GS2 manual)

<n>.error-count (s32, RW)

<n>.loop-time (float, RW) how often the modbus is polled (default 0.1)

<n>.nameplate-HZ (float, RW) Nameplate Hz of motor (default 60)

<n>.nameplate-RPM (float, RW) Nameplate RPM of motor (default 1730)

<n>.retval (s32, RW) the return value of an error in HAL

<n>.tolerance (s32, RW) speed tolerance (default 0.01)

<n>.ack-delay (s32, RW) number of read/write cycles before checking at-speed (default 2)