MC_Communications_BkPlcMc

The function block internally calls the function blocks MC_AxAdsCommServer_BkPlcMc and MC_AxRtLoggerSpool_BkPlcMc. It also provides a message buffer.

Inputs

VAR_INPUT
    nFirstAxisIndex:    INT;
    nLastAxisIndex:     INT;
    pAxItf:             POINTER TO Axis_Ref_BkPlcMc;
END_VAR

Name	Type	Description
nFirstAxisIndex	INT	These parameters correspond to the parameters of the same name of the MC_AxAdsCommServer_BkPlcMc function block.
nLastAxisIndex	INT
pAxItf	POINTER	Here the address of the Axis_Ref_BkPlcMc array is to be transferred. An incorrect specification at this point causes the PLC application to crash inevitably through triggering of serious runtime errors (Page Fault Exception).

Name

Type

Description

nFirstAxisIndex

INT

These parameters correspond to the parameters of the same name of the MC_AxAdsCommServer_BkPlcMc function block.

nLastAxisIndex

INT

pAxItf

POINTER

Here the address of the Axis_Ref_BkPlcMc array is to be transferred.

An incorrect specification at this point causes the PLC application to crash inevitably through triggering of serious runtime errors (Page Fault Exception).

Outputs

VAR_OUTPUT
    PlcMcManOffline:    BOOL;
END_VAR

Name	Type	Description
PlcMcManOffline	BOOL	This parameter corresponds to the parameter of the same name of the MC_AxAdsCommServer_BkPlcMc function block.

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nFirstAxisIdx, nLastAxisIdx: This parameter is used to specify the dimensioning of the Axis_Ref_BkPlcMc array.

Notice

Crash of the PLC application

An incorrect specification at this point excludes some of the axes from the communication or results in a crash of the PLC application by triggering serious runtime errors (Page Fault Exception)

Behavior of the function block

By cyclic call of this function block in the PLC application the transferred axes are connected to an internal message buffer. The message buffer referenced when calling MC_AxUtiStandardInit_BkPlcMc is ignored when calling the MC_Communications_BkPlcMc function block. The messages from the internal message buffer are cyclically transferred to the Windows Event Viewer by internally calling an instance of the MC_AxRtLoggerSpool_BkPlcMc function block. Furthermore the PLC application gets the character of an ADS server, because internally an instance of the MC_AxAdsCommServer_BkPlcMc function block is called.