ErrSetLevel | Error Functions

Sets the nesting error level to enable Citect SCADA error checking inside a nested function (when Citect SCADA error checking has been disabled). This function returns the old error level and sets a new error level.

The nesting error level is incremented every time the ErrSet(1) function is called.

! ErrorLevel 0 defaults to ErrSet(0) - enables Citect SCADA error-checking.
FUNCTION MainFn()
	ErrSet(1);
	! ErrorLevel 1 - disables Citect SCADA error checking.
	Fn1();
	ErrSet(0);
	! Enables Citect SCADA error checking.
END
FUNCTION Fn1()
	ErrSet(1);
	! ErrorLevel 2 - disables Citect SCADA error checking.
	Test=Var/0;
	Error=IsError();
	! Sets Error to 273 (divide by zero).
	Fn2();
	ErrSet(0);
	! Enables Citect SCADA error checking.
END
FUNCTION Fn2()
	OldErrorLevel=ErrSetLevel(0);
	! Sets nesting error level to 0 to enable Citect SCADA error-checking.
	Test=Var/0;
	! Cicode halts and a hardware alarm is generated.
	ErrSetLevel(OldErrorLevel)
	! Resets nesting error level to disable Citect SCADA error-checking.
END