Fieldserver Dart FS-8700-78 Manual do Utilizador descarregar pdf (Página 32)

Driver Manual

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Page 30

6.1.6 Advanced Map Descriptor: Example 3 - Using the 'special' parameter.

Map_Descriptor_Name, Data_Array_Name, Data_Array_Offset, Function, node_name, Address, Length, DA_Func, DA_Field, DA_Method

,DA_Bytcnt, DA_Offset, DA_Elecnt Scan_Interval

A1, DA_AI3, 0, rdbc, Node_A, 0, 1 , dap-stat, special, 1 4, 10, 1, 5

You can use

specials as rdbc

and passive map

descriptors.

See table

6.3

for

descriptions

on how these

extraction

methods work.

It would be

sensible for

DA_AI3 to be an

array of FLOATs

because extraction

method(=1)

returns a floating

point number.

Performs a D

status query

From the data bytes

returned by the slave,

extract 4 bytes

starting at

byte 10

and

apply method 1

to convert the bytes

before writing them to

the FieldServer data

Once you use

the parameter

'special' you

must specify the

additional

parameters.

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