Prosoft-technology MVI56-DFCMR Manual de usuario descargar pdf (Pagina 96)

MVI56-DFCMR ♦ ControlLogix Platform Reference

DF1 Interface Module with Reduced Data Block

Page 96 of 113 ProSoft Technology, Inc.

October 20, 2008

Function Code #501 - Protected Typed Logical Read (Two Address Fields)

Column Parameter Description Parameter

1 Enable/Type Word 0=Disabled and 1=Continuous.

2 Virtual Database Address This parameter defines the database address of the first

data point to be associated with the command.

3 Poll Interval Minimum number of seconds to wait before polling with

this command.

4 Count Number of data word values to be considered by the

function.

5 Swap Type Code Swap type code for command: 0=None, 1=Swap words,

2=Swap words & bytes and 3=swap bytes in each word.

6 Node Address Address of unit to reach on the data highway.

7 Function Code = 501 Logical Read Command

8 File Type SLC file type letter as used in file name string. Valid

values for the system are N, S, F, A, ….

9 File Number SLC file number to be associated with the command. P2

10 Element Number The parameter defines the element in the file where

write operation will start.

11 Not Used This field is not used by the command. Values entered

in this column will be ignored.

This function reads one or more words of data from a PLC data table.

Function Code #502 - Protected Typed Logical Read (Three Address Fields)

Column Parameter Description Parameter

1 Enable/Type Word 0=Disabled and 1=Continuous.

2 Virtual Database Address This parameter defines the database address of the first

data point to be associated with the command.

3 Poll Interval Minimum number of seconds to wait before polling with

this command.

4 Count Number of data word values to be considered by the

function.

5 Swap Type Code Swap type code for command: 0=None, 1=Swap words,

2=Swap words & bytes and 3=swap bytes in each word.

6 Node Address Address of unit to reach on the data highway.

7 Function Code = 502 Logical Read Command

8 File Type SLC file type letter as used in file name string. Valid

values for the system are N, S, F, A, ….

9 File Number SLC file number to be associated with the command. P2

10 Element Number The parameter defines the element in the file where

write operation will start.

11 Sub-Element Number This parameter defines the sub-element to be used with

the command. Refer to the AB documentation for a list

of valid sub-element codes.

This function reads one or more words of data from a PLC data table. This

function should work on the following devices: SLC 500, SLC 5/03 and SLC 5/04.

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