Rockwell-automation 1747-PCIS API Software - Open Controller Instrukcja Użytkownika Pobierz pdf (Strona 110)

Publication 1747-UM002A-US-P - June 2000

6-50 Library of Routines

OC_ReadModuleFile

OC_ReadModuleFile reads a data file from a module.

Syntax:

int OC_ReadModuleFile(HANDLE handle, BYTE ftype,

WORD *mfile, int slotnum, WORD offset, WORD len);

Parameters:

Description:

This function accesses an internal data file of the selected module. I/O

scanning is blocked while this access takes place.

Return Value:

Considerations:

Supported in the DOS API library and the Windows NT API library

Parameter: Description:

handle Must be a valid handle returned from OC_OpenScanner

ftype Defines the module type as:

FILTYP_M0 M0 file

FILTYP_M1 M1 file

FILTYP_G G file

mfile Buffer file that contains data read from the module at

slotnum

The data in mfile is read from the module starting at word

offset. This function does not read data past the end of the

module file for the slot.

slotnum Must be a valid slot number

offset Must be valid word number within module file

len Number of words read from the module located at

slotnum on the

scanner into the buffer

mfile

Name: Value: Description:

SUCCESS 0 file was read successfully

ERR_OCACCESS 2

handle does not have access to scanner

ERR_OCPARAM 8 parameter contains invalid value

ERR_OCRESPONSE 10 scanner did not respond to request

ERR_OCSCANCFG 14 scanner has not been configured

ERR_OCSLOT 12 slot number is invalid

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Rockwell-automation 1747-PCIS API Software - Open Controller Instrukcja Użytkownika Strona 110