Rockwell-automation 1747-PCINT API Software for 1746 I/O Manual de usuario descargar pdf (Pagina 49)

Publication 1747-6.5.3 June 1998

Chapter

Configuring I/O Modules

Introduction This chapter explains how to configure the I/O modules for your 1746 I/O PCI

Interface system. You can either use the autoconfigure (OC_GetIOConfiguration)

function or build your own configuration (OC_CreateIOConfiguration).

A separate I/O configuration utility is available for the PCI SLC I/O bus interface

to simplify this process. The utility is on the 1746 I/O PCI Interface utilities disk

that ships with the 1746 I/O PCI Interface (1747-PCIS[2]). The I/O configuration

utility (ioconfig.exe) allows an I/O configuration data file to be created and saved

to disk.

Configuring I/O The application configures the scanner by downloading information about the

installed rack sizes and module types. Call the OC_GetIOConfiguration function

to get the current I/O configuration or use OC_CreateIOConfiguration to build an

I/O configuration. Both of these functions return a valid I/O configuration that can

be downloaded to the scanner.

The scanner will not go to Scan mode until the OC_DownloadIOConfiguration

function sends the configuration information. The scanner checks the downloaded

I/O configuration against the installed modules when the application attempts to set

the scanner to Scan mode. The scanner returns an extended error if the I/O

configuration is not valid and the scanner will fault.

The OC_CreateIOConfiguration function requires a structure containing rack sizes

and module types or module names. The structure is:

struct {

BYTE Rack1Size; /* number of slots in rack1 (4,7,10, or 13) */

BYTE Rack2Size; /* number of slots in rack2 (0,4,7,10, or 13) */

BYTE Rack3Size; /* number of slots in rack3 (0,4,7,10, or 13) */

OCSLOTCFGSlotCfg[31];/* slot information */

} OCIOCFG;

Initialize the three rack size variables with the total number of slots in each rack. If

rack 2 or rack 3 is not installed, set the size to 0.

SlotCfg contains information about each slot in the racks. The 1746 I/O PCI

Interface supports as many as 31 slots, numbered 0 to 30. Slot 0 is the adapter slot

(left slot of rack 1) and is invalid for scanner functions. Each slot is described by

the structure

OCSLOTCFG:

1 2 ... 44 45 46 47 48 49 50 51 52 53 54 ... 154 155

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Rockwell-automation 1747-PCINT API Software for 1746 I/O Manual de usuario Pagina 49