System Variables

Product:	ISaGRAF 4.03
Date:	04-April-2000
File:	System Variables.htm
Subject:	Listing standard system variables linked to a resource
Keywords:	System Variables

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System variables are defined in dsys0def.h To Read or Write resource system variables, only the ST language can be used.

In the R/W column:

Variable name	TYPE	R/W	Meaning
__SYSVA_RESNAME	STRING	R	Resource Name (Max len=255)
__SYSVA_SCANCNT	DINT	R	Input Scan Counter
__SYSVA_CYCLECNT	DINT	R	Cycle Counter
__SYSVA_KVBPERR	BOOL	R/W	Kernel Variable Binding Producing Error
__SYSVA_KVBCERR	BOOL	R/W	Kernel Variable Binding Consuming Error
__SYSVA_TCYCYCTIME	TIME	R/W	Programmed Cycle Time
__SYSVA_TCYCURRENT	TIME	R	Current Cycle Time
__SYSVA_TCYMAXIMUM	TIME	R	Maximum Cycle Time Since Last Start
__SYSVA_TCYOVERFLOW	DINT	R	Number Of Cycle Overflows
__SYSVA_RESMODE	SINT	R	Resource Execution Mode
__SYSVA_CCEXEC	BOOL	W	Execute one cycle when application is in cycle to cycle mode
__SYSVA_WNGCMPTNM	STRING	R	Warning Component Name;
__SYSVA_WNGCMD	SINT	R/W	Warning CMD;

Caution for _SYSVA_CCEXEC!

It is not significant to use _SYSVA_CCEXEC in an ST program, because the resource is in cycle to cycle mode, programs are not executed.

Resource modes (for __SYSVA_RESMODE) are defined as follows:

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