not specific to the Omron VFD:

- Some Modbus clients like the GS2 permit reading multiple registers (aka 
'coils') in one read transactions. The Toshiba I worked with only supports 
single-register reads which required some restructuring and keeping an eye on 
roundtrip time if multiple registers are involved in the inner loop.

- to make sense of the documentation and explore the device, I wrote a utility 
to interactively explore/control the VFD - it might help you too: 
http://git.mah.priv.at/gitweb/modio.git

-m

Am 24.09.2011 um 09:14 schrieb Viesturs Lācis:

> Hello, gentlemen!
> 
> I would like to ask, if anyone could share their experience with Omron
> V1000 VFD. More specifically, I am interested in getting the drive
> communicating with EMC through Modbus. Is there anything specific to
> know or to avoid?
> 
> Thanks in advance!
> 
> Viesturs
> 
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