mks mass flow controllers only giving 2 sig. figs. over deviceNet and labview

[David_Young_NREL]

We can only read  2 digits (before the decimal point) on an MKS deviceNet mass flow controller using Labview 2013.  Does anyone know a solution to increase the resolution on this device?  We should be able to read 3 digits past the decimal point.

[ZhouShanghai]

Hi,

Is the device a 3rd party device?

According to our engineer, we have no control on how the 3rd party device returns data. Could you clarify a little more about your question?

[ZhouShanghai]

Hi David,

Could you also specify the type of mass flow controller device?

According to our engineer, we had the APIs to set the attributes of DeviceNet device, but the specific type of the device is required. Attached is the document of some device type. You could turn to page 75 to see there the S-Analog Sensor Object Attributes::FlowDataType could be Get/Set.

[David_Young_NREL]

The MFC is an MKS GE-series.  Our problem is that when we write and read the MFC through Labview-> DeviceNet, we only get integer values.  We need 2 or 3 decimal places.  Is there a problem with DeviceNet, or the MFC or do you think the problem is with our Labview code?

[ZhouShanghai]

Hi,

Could you kindly paste your VI(s) that utilizes the DeviceNet APIs?

[amazed]

check class x31. att 3 and 4  Presume you should be set for real and either sccm or liters.   Do same for setpt