Prosoft-technology MVI56E-LDM Manual de usuario descargar pdf (Pagina 165)

ControlLogix Platform ♦ "C" Programmable CIP API Functions

Linux Application Development Module Developer's Manual

ProSoft Technology, Inc. Page 159 of 264

March 12, 2014

OCXcip_GetWCTimeUTC

Syntax

int OCXcip_GetWCTimeUTC (OCXHANDLE apihandle,

BYTE *pPathStr,

OCXCIPWCT *pWCT,

WORD timeout);

Parameters

apihandle

handle returned by previous call to OCXcip_Open

pPathStr

path to device being read

pWCT

Pointer to OCXCIPWCTUTC structure to be filled with Wall Clock

Time data

timeout

number of milliseconds to wait for the read to complete

Compatibility

This function is compatible only with Logix controllers with v16 or greater

firmware installed. Firmware versions below v16 will result in error

OCX_CIP_INVALID_REQUEST. For previous firmware versions, use

OCXcip_GetWCTime().

Description

OCXcip_GetWCTimeUTC retrieves information from the Wall CLock object in the

specified device. The time returned is expressed as UTC time.

apihandle must be a valid handle returned from OCXcip_Open.

pPathStr must be a pointer to a string containing the path to a device which

supports the Wall Clock Time object, such as a ControlLogix controller.

pWCT may point to a structure of type OCXCIPWCTUTC, which on success will be filled

with the data read from the device. As a special case, pWCT may also be NULL.

If pWCT is NULL, the system time is set with the UTC time returned from the WCT

object. This is a convenient way to synchronize the system time with the

controller time (Note: The user account must have appropriate privileges to set

the system time.)

timeout is used to specify the amount of time in milliseconds the application

should wait for a response from the device.

The following example defines the OCXCIPWCTUTC structure:

typedef struct tagOCXCIPWCT

{

ULARGE_INTEGER CurrentUTCValue;

char TimeZone[84];

int DSTOffset;

int DSTEnable;

SYSTEMTIME SystemTime;

} OCXCIPWCTUTC;

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