System parameters/Variables

1min

In the RS274/NGC language view, a machining center maintains 5999 numerical parameters. They can be accessed by #1 .. #5999. The specific parameters with a dedicated function are listed in the table below. Other parameters in the range of 1..5999 are free to use in your G-Code program. Some of them have a special function and are read-only; see the table below:
*parameters in italics are read-only
Parameter Number
Purpose
1 - 26*
Used for parameters when overriding m-functions.
In the g-code there is e.g.
M999 X100 S1000 
And you have in your macro.cnc:
Sub m999
    msg “this is my m999 X=”#24” S=”#19
Endsub
Inside the subroutine, the given X and S parameters are at #24 and #19
#1-#26 = A – Z parameter value.
Values are negative -1e10 if not provided with m999 in this example.
27 - 4999
Free to use, note that 4995 – 4999 are used by the tool length measurement function under user button 2.
Z#4996 safe height for tool measurement above the fixed tool setter.
x#4997 y#4998 fixed tool setter position.
z#4999 chuck height, or zero length tool height, chuck just touches the fixed tool setter at this height.
Z#4995 is used for the tool setter height for zeroing Z under user button 1.
4000 - 4999
Free to use, persistent, see above some of these are used by tool length measurement and zeroing.
5001 - 5006*
Position of X – C, interpreter position = work position
5008*
Current tool number
5009*
Current tool radius
5010*
Current tool Z offset (length + zDelta)
5011*
New tool number during tool change (M6)
5012*
Current tool X offset (X offset + xDelta)
5013*
Current G43 Z offset (Z offset + zDelta)
5014*
Current G43 X offset (X offset + xDelta)
5015 - 5050
Used in tool change sub routine
5051 - 5056*
Probe position X - C in machine coordinates
5061 - 5066*
Probe position X - C in work coordinates
5067*
1 if the probe is triggered after G38.2, 0 otherwise
5068*
Current probe value
5069*
Handwheel counter
5070*
Spindle rate in rev/second
5071 - 5076*
Position of X - C, interpreter position without offsets = machine position
5081 - 5086*
Probe position X - C in joint coordinates
5101 - 5106*
MCA negative limit X - C
5111 - 5116*
MCA positive limit X - C
5121 - 5126*
Home position X - C
5131 - 5133*
TCA negative limit X - Z
5141 - 5143*
TCA positive limit X - Z
5150*
Active kinematics type:
1: Trivial
2: 4_AX_ACYLINDER (Y -> A mapping)
3: Virtual C
4 - 17: System reserved
18 - 30: Custom 1 – Custom 12
5151*
ZHC is active
5152*
1 if the spindle is on, 0 if the spindle is off.
5161 - 5166*
G28 home X - C
5181 - 5186*
G30 home X - C
5190*
G68 rotation method (0 = off, 1 = on)
5191 - 5193*
G68/G51 rotation point X - C
5194*
G68 rotation angle XY
5195*
G68 rotation angle YZ
5196*
G68 rotation angle XZ
5200*
0 if G51 scaling is off, 1 if G51 scaling is on
5204*
G51 scaling factor X
5205*
G51 scaling factor Y
5206*
G51 scaling factor Z (always 1.0)
5211 - 5216
G92 offset X - C
5220
Coordinate system number
5221 - 5226
Coordinate system 1 X - C
5241 - 5246
Coordinate system 2 X - C
5261 - 5266
Coordinate system 3 X - C
5281 - 5286
Coordinate system 4 X - C
5301 - 5306
Coordinate system 5 X - C
5321 - 5326
Coordinate system 6 X - C
5341 - 5346
Coordinate system 7 X - C
5361 - 5366
Coordinate system 8 X - C
5381 - 5386
Coordinate system 9 X - C
5390*
Spindle selection 0 = M90, 1 = M91, 2 = M92
5391 - 5393*
Alternative spindle offset X- Z
5394 - 5397*
Spindle speed max M90 - M93
5230, 5250, 5270, 5290, 5310, 5330, 5350, 5370
Reserved for rotation coordinate system
5380*
Simulation mode, 0: controller connected, 1: simulation mode
5397*
Running mode, 0: running, 1: rendering
Use e.g. if you have G38.2 movements in your macro file because during rendering G38.2 always runs until the given end point which may give incorrect tool measurement results. Always take care that the tool table contains (approx.) correct tool data
5398*
Return value of dlgmsg (1 = OK, -1 = Cancel)
5399*
Return value for M55, M56
5401 - 5499
Tool Z offset (length) for tools 1 - 99
5501 - 5599
Tool diameter for tools 1 - 99
5601 - 5699
Tool X offset (for lathe) for tools 1 - 99
5701 - 5799
Tool orientation (for turning) for tools 1 - 99
5801 - 5899
Tool X delta due to wear
5901 - 5999
Tool Z delta due to wear
﻿

Parameter Number	Purpose
1 - 26*	Used for parameters when overriding m-functions. In the g-code there is e.g. M999 X100 S1000 And you have in your macro.cnc: Sub m999 msg “this is my m999 X=”#24” S=”#19 Endsub Inside the subroutine, the given X and S parameters are at #24 and #19 #1-#26 = A – Z parameter value. Values are negative -1e10 if not provided with m999 in this example.
27 - 4999	Free to use, note that 4995 – 4999 are used by the tool length measurement function under user button 2. Z#4996 safe height for tool measurement above the fixed tool setter. x#4997 y#4998 fixed tool setter position. z#4999 chuck height, or zero length tool height, chuck just touches the fixed tool setter at this height. Z#4995 is used for the tool setter height for zeroing Z under user button 1.
4000 - 4999	Free to use, persistent, see above some of these are used by tool length measurement and zeroing.
5001 - 5006*	Position of X – C, interpreter position = work position
5008*	Current tool number
5009*	Current tool radius
5010*	Current tool Z offset (length + zDelta)
5011*	New tool number during tool change (M6)
5012*	Current tool X offset (X offset + xDelta)
5013*	Current G43 Z offset (Z offset + zDelta)
5014*	Current G43 X offset (X offset + xDelta)
5015 - 5050	Used in tool change sub routine
5051 - 5056*	Probe position X - C in machine coordinates
5061 - 5066*	Probe position X - C in work coordinates
5067*	1 if the probe is triggered after G38.2, 0 otherwise
5068*	Current probe value
5069*	Handwheel counter
5070*	Spindle rate in rev/second
5071 - 5076*	Position of X - C, interpreter position without offsets = machine position
5081 - 5086*	Probe position X - C in joint coordinates
5101 - 5106*	MCA negative limit X - C
5111 - 5116*	MCA positive limit X - C
5121 - 5126*	Home position X - C
5131 - 5133*	TCA negative limit X - Z
5141 - 5143*	TCA positive limit X - Z
5150*	Active kinematics type: 1: Trivial 2: 4_AX_ACYLINDER (Y -> A mapping) 3: Virtual C 4 - 17: System reserved 18 - 30: Custom 1 – Custom 12
5151*	ZHC is active
5152*	1 if the spindle is on, 0 if the spindle is off.
5161 - 5166*	G28 home X - C
5181 - 5186*	G30 home X - C
5190*	G68 rotation method (0 = off, 1 = on)
5191 - 5193*	G68/G51 rotation point X - C
5194*	G68 rotation angle XY
5195*	G68 rotation angle YZ
5196*	G68 rotation angle XZ
5200*	0 if G51 scaling is off, 1 if G51 scaling is on
5204*	G51 scaling factor X
5205*	G51 scaling factor Y
5206*	G51 scaling factor Z (always 1.0)
5211 - 5216	G92 offset X - C
5220	Coordinate system number
5221 - 5226	Coordinate system 1 X - C
5241 - 5246	Coordinate system 2 X - C
5261 - 5266	Coordinate system 3 X - C
5281 - 5286	Coordinate system 4 X - C
5301 - 5306	Coordinate system 5 X - C
5321 - 5326	Coordinate system 6 X - C
5341 - 5346	Coordinate system 7 X - C
5361 - 5366	Coordinate system 8 X - C
5381 - 5386	Coordinate system 9 X - C
5390*	Spindle selection 0 = M90, 1 = M91, 2 = M92
5391 - 5393*	Alternative spindle offset X- Z
5394 - 5397*	Spindle speed max M90 - M93
5230, 5250, 5270, 5290, 5310, 5330, 5350, 5370	Reserved for rotation coordinate system
5380*	Simulation mode, 0: controller connected, 1: simulation mode
5397*	Running mode, 0: running, 1: rendering Use e.g. if you have G38.2 movements in your macro file because during rendering G38.2 always runs until the given end point which may give incorrect tool measurement results. Always take care that the tool table contains (approx.) correct tool data
5398*	Return value of dlgmsg (1 = OK, -1 = Cancel)
5399*	Return value for M55, M56
5401 - 5499	Tool Z offset (length) for tools 1 - 99
5501 - 5599	Tool diameter for tools 1 - 99
5601 - 5699	Tool X offset (for lathe) for tools 1 - 99
5701 - 5799	Tool orientation (for turning) for tools 1 - 99
5801 - 5899	Tool X delta due to wear
5901 - 5999	Tool Z delta due to wear

Language standard

Supported G-code