FieldServer FS-8700-80 Driver Related Map Descriptor Parameters, Timing Parameters

McQuay Micro Tech Open Protocol Driver Manual Page 9 of 35

4.4.Client Side Map Descriptors

4.4.1.FieldServer Related Map Descriptor Parameters

Column Title	Function	Legal Values
Map_Descriptor_Name	Name of this Map Descriptor	Up to 32 alphanumeric
		characters
	Name of Data Array where	One of the Data Array names
Data_Array_Name	data is to be stored in the	from “Data Array” section
	FieldServer	above
Data_Array_Offset	Starting location in Data Array	0 to maximum specified in
		“Data Array” section above
Function	Function of Client Map	Rdbc, Wrbc, Wrbx
	Descriptor

4.4.2.Driver Related Map Descriptor Parameters

Column Title		Function	Legal Values
			One of the node
Node_Name	Name of Node to fetch data from		names specified in
			“Client Node
			Descriptor” above
		Length of Map Descriptor. Only one data field can be	Set to 1 except
Length		read or written per poll/response sequence, thus driver	when reading a
		assumes a length of 1.	direct address.
		The name of the data field of interest. Each address
		with meaningful data in the McQuay device has a	‘Everything’ or
		name. The field names are defined in a specification
Field_Name			select a field name
		for each device type. If the field name is unknown, the
			from Table 2
	Address can be defined. Refer to Appendix A.4 for
		further information.
		If set to No then the driver stores the raw values, if set
		to Yes, the data is scaled before storing. The device
Device_Scaling		scaling applied is shown in Table 1. Note that	Yes, No
		‘Device_Scaling’ has no meaning when writing to a
		McQuay device.

4.4.3.Timing Parameters

Column Title	Function	Legal Values
Scan_Interval	Rate at which data is polled	>0.1s

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