Fieldserver Dart FS-8700-78 Instrukcja Użytkownika Pobierz pdf (Strona 26)

Driver Manual

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Page 24

another value for DA_Assoc.

Da_Freq Used only for connection to

DART’s.

Specify in milliseconds the

interval at which you want a

wrbc/rdbc map descriptor to be

executed.

When using wrbc/rdbc’s to a

dart device set the scan interval

to 5.0s and set this parameter to

a number greater than 180000

(3 minutes). An interval of

300000 (5 minutes is

recommended).

DA_Method

Specifies the extraction method.

Such as Hex-ASCII to decimal

number in 10's of a degree,

See section 6.3 for a list of

possible values.

DA_Bytcnt

Specifies the number of bytes

that are to be processed by the

method specified above. For

method#6 which processes an

array of elements the

DA_Bytcnt specifies the

number of bytes that constitute

each element of the array.

>= 1

DA_Offset

An offset into the data

composite that is returned when

the slave is polled. The offset is

the number of bytes from the

first data byte.

0 to the length of the data

composite. No validation is

performed.

DA_Elecnt

Number of elements that are

produces by the extraction

method.

>= 1

Ψ:

These parameters are only required for custom data extractions not provided for with DA_Field

parameter.

6.1.1 DA_Func Parameter - Permitted values.

The driver supports a limited subset of the Dart Poll & Response Functions. The selection

of the sub-set is based on the identification of useful & practical functions.

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