Default system variables

The default system variables for

Micro800

controllers are available in the global variables grid.

Default system variables
Variable Name	Type	Read/Write	Description
__SYSVA_ABORT_CYCLE	BOOL	Read	Canceling cycle.
__SYSVA_CCEXEC	BOOL	Read/Write	Execute one cycle when the application is in cycle-to-cycle mode.
__SYSVA_CYCLECNT	DINT	Read	Cycle counter.
__SYSVA_CYCLEDATE	TIME	Read	Time stamp of the beginning of the cycle in milliseconds.
__SYSVA_FIRST_SCAN	BOOL	Read	First scan bit. True only on the first scan after that go to run.
__SYSVA_KVBCERR	BOOL	Read/Write	Kernel variable binding consuming error or consumption error.
__SYSA_KVBPERR	BOOL	Read	Kernel variable binding producing error or production error.
__SYSVA_MAJ_ERR_HALT	BOOL	Read	Fault indicator.
__SYSVA_POWERUP_BIT	BOOL	Read	Power up bit. True only in the first scan after a power-up or running a new ladder for the first time.
__SYSVA_PROJ_INCOMPLETE	UDINT	Read	Project incomplete. BIT 0: Set when the Run Mode Change process starts. Cleared once the Run Mode Change is written permanently to the controller after completion of Accept Changes or Undo Changes. BIT 1: Set if an error occurs while saving the changes to flash or an integrity check fails during Run Mode Change. Cleared on the next successful Run Mode Change.
__SYSVA_REMOTE	BOOL	Read	Indicates the switch position of the remote switch.
__SYSVA_RESMODE	SINT	Read	Resource execution mode. Possible modes are: -1: Fatal error. -2: Resource is stopped in stepping mode after exception. -3: Resource is stopped in stepping mode after division by zero exception. -4: Resource is stopped in stepping mode after bound check exception. -5: Maximum negative value for stepping. 1: Stored resource available. 2: Ready to run. 3: Run in real time. 4: Run in cycle by cycle. 5: Run with breakpoint encountered. 7: Stopped in stepping mode. 8: Micro800 programming mode. 9: Micro800 suspend mode. 10: Micro800 download mode - no program is loaded.
__SYSVA_RESNAME	STRING	Read	System variable showing controller model name. For example, Micro810 . (max length = 255).
__SYSVA_SCANCNT	DINT	Read	Input scan counter.
__SYSVA_SUSPEND_ID	UINT	Read	Suspend ID for SUS instruction block.
_SYSVA_TCYCURRENT	TIME	Read	Current cycle time. Current cycle time and maximum cycle time fluctuate due to variabilities in the project such as user program and communications.
__SYSVA_TCYCYCTIME	TIME	Read/Write	Programmed cycle time. Programmed cycle time is implemented in a resolution of 10 ms. If the entered value is not a multiple of 10, it will be rounded up to the next multiple of 10.
__SYSVA_TCYMAXIMUM	TIME	Read	Maximum cycle time since last start. Current cycle time and maximum cycle time fluctuate due to variabilities in the project, such as user program and communications.
__SYSVA_TCYOVERFLOW	DINT	Read	Number of cycle overflows. Micro810 system variable values cannot be retained during a power down. To save system variable values, they must be copied to a retained user variable. The value of _SYSVA_TCYOVERFLOW increases when (SYSVA_TCYCYCTIME)-(actual scan time) is smaller than or equals 10 ms.
__SYSVA_TCYWDG	UDINT	Read/Write	Watchdog timeout. User Program watchdog timeout don't configured more than 2.55 seconds.
__SYSVA_USER_DATA_LOST	BOOL	Read/Write	User data lost. True when Retentive User Data is cleared. Remains True until cleared by user or on a new User Program download. User Data Lost is TRUE when the controller powers up with certain Hard Faults and is only able to restore the User Program but not the Retentive User Data.

Variables

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