FieldServer FS-8700-123 instruction manual Map Descriptor Example 4 Start / Stop Counting

FS-8700-123 MetOne Particle Counter Serial Driver Manual Page 12 of 26

4.8.Map Descriptor Example 4 – Start / Stop Counting.

In this example the driver sends a command to start or stop the field device from counting based on the value found in the Data Array element. If the value is non-zero, the field device will be commanded to start counting. If the value is zero, the field device will be commanded to stop counting. In this example the function is set to wrbx which means the command message will be sent each time the value found at the specified offset in the specified Data Array is updated even if it is not changed.

//Client Side Map Descriptors

Map_Descriptors
Map_Descriptor_Name,	Data_Array_Name,	Data_Array_Offset,	Function,	Node_Name	Met1_Function,	Length,	Scan_Interval
Write_Count_Mode,	DA_COUNT_CTRL,	0,	wrbx,	MET1,	Count ,	1,	1.0s

Driver extracts one single value from this	Command is		sent
DA:Offset and uses the value to send a	each time the value
command to start counting (non-zero value) or	at	DA:offset	is
stop counting (zero value)	updated.

Set length to 1 for this Met1_Function

When the function is wrbx then the scan interval parameter is ignored.

FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldServer.com Tel: 408 262-2299 Fax: 408-262-2269 Toll_Free: 888-509-1970 email: support@fieldServer.com