System variables list

FANUC Macro B system variables provide access to internal CNC control data including machine coordinates, offsets, modal states, timers and so on. This makes them essential for advanced CNC automation.

Common use cases include probing and automatic offset adjustment, adaptive machining programs, tool life tracking, and custom macro cycles. By using system variables, manufacturers can improve machining accuracy, reduce setup time, and automate complex CNC processes.

Common system variables {{ fanucA }}{{ fanucB }}{{ fanucC }}{{ haas }}

Variable	Meaning
#3000	Custom alarm message
#3006	Operator message
#3001	This variable acts as a timer that counts continuously at 1 millisecond intervals. Upon reaching 2,147,483,648 milliseconds, the timer returns to 0.
#3011	This variable contains the current date (year / month / day). for example, February 01, 2020 is stored as 20200201.
#3012	This variable contains the current time (hours / minutes / seconds) . for example, February 01, 2020 is stored as 20200201. For example, 15 minutes and 10 seconds after 4 p.m. is stored as 161410.

Tool data (mill) {{ fanucA }}{{ fanucB }}{{ fanucC }}

Variable (200 tools max) or (up to 400)	Meaning
#2201 - #2400 or #11001 - #11400	Tool length
#2001 - #2200 or #10001 - #10400	Tool length wear
#2401 - #2600 or #13001 - #13400	Tool radius
#2601 - #2800 or #12001 - #12400	Tool radius wear

Tool data (lathe) {{ fanucA }}{{ fanucB }}{{ fanucC }}

Variable (64 tools max) or (up to 160)	Meaning
#2701 - #2764 or #10001 - #10160	X-axis offset
#2001 - #2064 or #15001 - #15160	X-axis offset wear
#2801 - #2864 or #11001 - #11160	Z-axis offset
#2101 - #2164 or #16001 - #16160	Z-axis offset wear
#2901 - #2964 or #12001 - #12160	Nose radius
#2201 - #2264 or #17001 - #17160	Nose radius wear
#2300 - #2364 or #13001 - #13160	Tool-tip direction

Work offset variables {{ fanucA }}{{ fanucB }}

Variable	Meaning
#2500 - #2800	G53
#2501 - #2801	G54
#2502 - #2802	G55
#2503 - #2803	G56
#2504 - #2804	G57
#2505 - #2805	G58
#2506 - #2806	G59

Work offset variables {{ fanucC }}

Variable	Meaning
#5201 - #5205	G53
#5221 - #5225	G54
#5241 - #5245	G55
#5261 - #5265	G56
#5281 - #5285	G57
#5301 - #5305	G58
#5321 - #5325	G59

System variables {{ fanucA }}{{ fanucB }}

Variable	G-code	Group number
#4001	G00 G01 G02 G03 G33	1
#4002	G17 G18 G19	2
#4003	G90 G91	3
#4004	G22 G23	4
#4005	G93 G94 G95	5
#4006	G20 G21	6
#4007	G40 G41 G42	7
#4008	G43 G44 G45	8
#4009	G73 G74 G76 G80 G81 G82 G83 G84 G85 G86 G87 G88 G89	9
#4010	G98 G99	10
#4011	G50 G51	11
#4012	G65 G66 G67	12
#4013	G96 G97	13
#4014	G54 G55 G56 G57 G58 G59	14
#4015	G61 G62 G63 G64	15
#4016	G68 G69	16
#4017	G15 G16	17
#4019	G40.1 G41.1 G42.1	19
#4022	G50.1 G51.1	22

System variables {{ fanucC }}

Variable - previous line	Variable - current line	G-code	Group number
#4001	#4201	G00 G01 G02 G03 G33	1
#4002	#4202	G17 G18 G19	2
#4003	#4203	G90 G91	3
#4004	#4204	G22 G23	4
#4005	#4205	G93 G94 G95	5
#4006	#4206	G20 G21	6
#4007	#4207	G40 G41 G42	7
#4008	#4208	G43 G44 G45	8
#4009	#4209	G73 G74 G76 G80 G81 G82 G83 G84 G85 G86 G87 G88 G89	9
#4010	#4210	G98 G99	10
#4011	#4211	G50 G51	11
#4012	#4212	G65 G66 G67	12
#4013	#4213	G96 G97	13
#4014	#4214	G54 G55 G56 G57 G58 G59	14
#4015	#4215	G61 G62 G63 G64	15
#4016	#4216	G68 G69	16
#4017	#4217	G15 G16	17
#4018	#4218	G50.1 G51.1	18
#4019	#4219	G40.1 G41.1 G42.1	19

Other modal {{ fanucA }}{{ fanucB }}

Variable	Adress
#4102	"B" - axis position
#4107	"D" - cutter radius
#4108	"E" - feed rate (optional)
#4109	"F" - feed rate
#4111	"H" - tool length
#4113	"M" - miscellaneous
#4115	"O" - program number
#4119	"S" - speed rate
#4120	"T" - tool number

Other modal {{ fanucC }}

Variable - previous line	Variable - current line	Adress
#4102	#4302	"B" - axis position
#4107	#4307	"D" - cutter radius
#4108	#4308	"E" - feed rate (optional)
#4109	#4309	"F" - feed rate
#4111	#4311	"H" - tool length
#4113	#4313	"M" - miscellaneous
#4115	#4315	"O" - program number
#4119	#4319	"S" - speed rate
#4120	#4320	"T" - tool number

Motion system variables

Variable	Meaning
#5001	Previous line (X)
#5002	Previous line (Y)
#5003	Previous line (Z)
#5041	Current line (X)
#5042	Current line (Y)
#5043	Current line (Z)