Support Delta VFD-B

[DougCoffland]

A customer sent me his Delta VFD-B and I got it going. We should add it to the tool pull-down.

Note - this is different from the existing entry in the tool pull-down titled 'Delta VFD015M21A (Beta) in the following ways:

• It uses a different manual.
• The front panel is different.
• The register seem to be named differently.
• The modbus program is the same except for the 'max-freq-read' command. This one reads from register 256 (100H) while the existing one reads from register address 3.

Here are screenshots of the Custom Modbus tool configuration

Here is a link to the manual: https://www.moteurspmr.com/wp-content/uploads/2015/09/VFD037B53A.pdf

Here are the recommended register settings for the VFD:

• 00-03 -> 01 startup display is the actual frequency
• 00-05 -> 60.00 displays actual output frequency in RPM
• 01-00 -> 400.00 Use this value with 24000 RPM spindle
• 02-00 -> 05 source of master frequency is RS-485 and last frequency not used
• 02-01 -> 04 source of first operation command is RS-485 and STOP/RESET button is disabled
• 02-04 -> 00 enable forward/reverse operation
• 09-00 -> 01 communications address (must be the same as 'bus-id' on the Buildbotics Controller)
• 09-01 -> 01 9600 baud (must be the same as 'baud' on the Buildbotics Controller)
• 09-02 -> 03 Transmission fault treatment is 'no warning, keep operating'
• 09-03 -> 0.0 No timeout detection
• 09-04 -> 03 8-bit, no parity, 2 stop bits