Function: ISO G-Motion function block
Author:   SBP (QuickWood Automation) 
Date:     28-01-2004

NOTE: Requeres target version 2.01 or heigher

//Commands for g_motion FB
#define GCMD_ADD_TO_FIFO	1
#define GCMD_CLEAR_FIFO		2
#define GCMD_SET_OVERRIDE	3
#define GCMD_SET_ACC		4
#define GCMD_SET_DEC		5 //set decceleration
#define GCMD_SET_PAUSE		6 //pause related to G4
#define GCMD_GET_NEXT_SEG	7 //calculate next segment
#define GCMD_GET_FIFO_LINE	8 //returns returns current fifo line no
#define GCMD_SYNC_X		9 //set internal position for X
#define GCMD_SYNC_Y		10 //set internal position for Y
#define GCMD_SYNC_Z		11 //set internal position for Z
#define GCMD_SYNC_A		12 //set internal position for A
#define GCMD_SYNC_B		13 //set internal position for B
#define GCMD_SYNC_C		14 //set internal position for C
#define GCMD_START		15 //start motion
#define GCMD_STOP		16 //stop motion
#define GCMD_ABORT		17 //abort current motion
#define GCMD_SET_FEED		18
#define GCMD_READ_FIFO		19 //reads spicified line in fifo
#define GCMD_FIFO_REMAIN	20 //returns the remaining line space in fifo
#define GCMD_SET_SEG_TIME	21

//Status for g_motion FB
#define GSTAT_NO_ERR			0
#define GSTAT_UNABLE_TO_SET_PARAM	1
#define GSTAT_UNABLE_TO_START		2
#define GSTAT_UNABLE_TO_STOP		3
#define GSTAT_UNABLE_TO_ABORT		4
#define GSTAT_UNABLE_TO_SYNC		5
#define GSTAT_FIFO_FULL			6
#define GSTAT_NO_MORE_SEG		7

//Motion states
#define GSTATE_IDLE		0
#define GSTATE_RUN		1
#define GSTATE_STOP		2
#define GSTATE_ABORT	        3