I just re-read this... If modbus is correctly implemented in the GT series, could you just use MB2HAL?
On 02/02/2017 10:51 AM, Sebastian Kuzminsky wrote:
> On 02/02/2017 09:34 AM, Kirk Wallace wrote:
>> On 02/02/2017 07:02 AM, Sebastian Kuzminsky wrote:
>>
>> ... snip
>>
>>> 2. The LinuxCNC Huanyang driver only works with the older style of
>>> Huanyang VFDs. It does not work with the newer GT-series models. I'm
>>> working on a new driver for Huanyang GT VFDs, but it's not ready yet.
>>
>>
>> Did you have a plan or an overview of the update. I could look at it so
>> then two of us probably won't get around to it.
>
> The GT-series use a totally different wire protocol from the earlier
> non-GT VFDs. Huanyang's manuals calls both protocols "Modbus", but the
> older non-GT VFD protocol is definitely not Modbus, it's some unique
> protocol Huanyang made up. It was reverse engineered by someone named
> "scotta" on CNC Zone, for which we owe a debt of gratitude.
>
> The Huanyang GT-series VFDs implement Modbus correctly, so they will be
> much easier to write a driver for.
>
> The VFD we got unfortunately lacked the switch on the circuit board that
> enables Modbus ("SW1"), instead it had a jumper wire there disabling
> Modbus. Wat. After communicating with Huanyang we desoldered this
> jumper wire and soldered it back in the "enable Modbus" position, and
> that got it communicating.
>
> So now it's just a small matter of programming, and writing some docs on
> how to modify the hardware to allow it to communicate via Modbus. I
> should have something ready for testing in a few weeks.
>
> Those Huanyang VFDs sure are inexpensive, but they're also the most
> wonky and obstinate VFDs I've ever worked with.
>
>
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