>Trying to link up a weighing software to control the closing and opening of a valve for a hopper. What it does is that when a weight target is keyed in to the system, the filling of a tanker is initiated until the target weight is achieved where the valve will then be shut. The process is done via a programmable logic controller.
>Any suggestions on how this should be done using VFP on WinXP? The program needs to be fail safe as the valve control failure will result in dangerous chemical spillage.
>Thanks in advance.
>Yau

We use ActiveX control done in VB6 for the similar job. Fuel Pumping.
Saety of solution depend mainly on hardware and correct low level protocol, which will be used.