FieldServer FS-8704-49 instruction manual DAAI1 Rdbc

FS-8700-49_Data_Aire_DAP Page 30 of 48

Appendix B.6. Advanced Map Descriptor Example 2:Collecting Error Messages

The DAP-II Status query returns 14 bytes of errors & status information. The arrangement and meaning of these bytes is defined by the Data Aire Corporation and is also dependent on the type of DAPII module being polled.

// Client Side Map Descriptors
Map_Descriptor_Name,	Data_Array_Name,	Data_Array_Offset,	Function,	Node_name,	Address,	Length,	DA_Func,	DA_Field,	Scan_Interval
A1,	DA_AI1,	0,	RDBC,	Node_A,	0,	1,	dap-stat,	errors,	5
A2,	DA_AI1,	1,	passive,	Node_A	0,	1,	dap-stat,	bitErrors,	5

The 'errors' key word returns 14 bytes, thus the DA_AI1 should be a BYTE array. Each byte will have values 0-15 to represent the value of the bits in each byte.

The bitErrors extracts the same data from the DAP but presents it as a series of 14x8 bits. Thus DA_DI1 should be a BIT array

Data arrangement and meaning of each error is defined by Data Aire Corp.

Example: Bit 24 is a LOW TEMP WARNING for DAPII-044/8/9 units.

Example: Bit 09 is a HUMIDITY SENSOR PROBLEM for a DAPII-080 unit

Server is a DAP
and is reading
status	BitErrors is a synonym
information.	for errors. The data is
	extracted using a
	different data format.

Appendix B.7. Advanced Map Descriptor Example 3: Using Special DA Field

//Client Side Map Descriptors

Map_Descriptor_Name,

Data_Array_Name,

Data_Array_Offset,

Function,

Node_name,

Address,

Length,

DA_Func,

DA_Field,

DA_Method,

DA_Bytecnt,

DA_Offset,

DA_Elecnt,

Scan_Interval

A1,

DA_AI3,

0,

RDBC,

Node_A,

0,

1,

dap-stat,

special,

1,

4,

10,

1,

5

It would be sensible for	Specials can	Performs a	If parameter	See Appendix B.4
		DAP status
DA_AI3 to be an array of	be used as		'special' is used,	for descriptions on
		query
Floats because extraction	rdbc and		additional	how these
method#1 returns a floating	passive Map		parameters must	extraction
point number.	Descriptors.		be specified.	methods work.

From the data bytes returned by the Server, extract 4 bytes starting at byte 10 and apply method 1 to convert the bytes before writing them to the FieldServer Data Array.

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