Rockwell-automation 1747-PCIS API Software - Open Controller Instrukcja Użytkownika Pobierz pdf (Strona 64)

Publication 1747-UM002A-US-P - June 2000

6-4 Library of Routines

OC_ConfigureDII

OC_ConfigureDII allows an application to receive a message from the

scanner when an input bit pattern of a discrete I/O module matches a

compare value.

Syntax:

int OC_ConfigureDII(HANDLE handle, DII_CFG *diicfg);

Parameters:

Description:

The application configures the compare value using this function and

when the comparison completes, the scanner generates a message to

the application. The application must then call OC_PollScanner to

retrieve the message.

The DII_CFG structure is defined as:

typedef struct {

BYTE SlotNum;/* slot number 1-30*/

BYTE IOIncludeMask;/* bits allowed mask */

BYTE IOEdgeType;/* bit pattern to compare */

WORD PresetCount;/* number of matches */

} DII_CFG;

Parameter: Description:

handle Must be a valid handle returned from OC_OpenScanner

diicfg Points to the DII configuration

This value: Means:

Slotnum Must contain the slot number of a Class 0 Discrete Input module. An I/O error

report is generated if the scanner determines the slot does not contain a valid

discrete input module.

IOIncludeMask Should contain the bits in the discrete input module to include in the

comparison. Only bits 0 - 7 of word 0 of the module can be configured for DII’s.

IOIncludeMask is a bit-mapped mask. Any bit set to 1 in this mask includes

the corresponding bit of the discrete input module in the comparison. Any bit

set to 0 is ignored.

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Rockwell-automation 1747-PCIS API Software - Open Controller Instrukcja Użytkownika Strona 64