T
tom paden
> Speaking in an official capacity, I should point out that the PI-MBUS_300.PDF ("original" from 1996) is obsolete. The "Modbus Serial Line Implementation Guide v1.0 November 2002" is the current document you should be using. PI-MBUS_300.PDF is only on www.modbus.org because so many people kept asking for it to look up legacy issues. <
May I suggest that the PI-MBUS_300.pdf document be emblazoned with "OBSOLETE" on it so we know that should not be used anymore!
Also, in addition to the "Modbus Serial Line Implementation Guide v1.0 November 2002", the other document you'll need is "MODBUS Application Protocol Specification V1.1", which describes the protocol itself.
Regards,
tom
May I suggest that the PI-MBUS_300.pdf document be emblazoned with "OBSOLETE" on it so we know that should not be used anymore!
Also, in addition to the "Modbus Serial Line Implementation Guide v1.0 November 2002", the other document you'll need is "MODBUS Application Protocol Specification V1.1", which describes the protocol itself.
Regards,
tom