| Variable | Usage |
|---|---|
| #1-#33 | Macro call arguments |
| #100-#149 | Probe values (if installed) |
| #150-#199 | General-purpose variables not saved on power off |
| #500-#550 | Probe calibration data (if installed) |
| #551-#999 | General-purpose variables saved on power off |
| #2001-#2200 | Tool length offsets |
| #2201-#2400 | Tool length wear |
| #2401-#2600 | Tool diameter/radius offsets |
| #2601-#2800 | Tool diameter/radius wear |
| #3000 | Programmable alarm #3000=1 (ALARM) |
| #3001 | Millisecond timer |
| #3002 | Hour timer |
| #3003 | Single block suppression |
| #3004 | Override [FEED HOLD] control |
| #3006 | Programmable stop with message #3006=1 (STOP) |
| #3011 | Year, month, day |
| #3012 | Hour, minute, second |
| #3901 | Machine Parts |
| #3902 | Required Parts |
| #4000 | Main Program Number |
| #4001-#4022 | Previous block G-code group codes |
| #4102 | Modal B Code |
| #4107 | Modal D Code |
| #4109 | Modal F Code |
| #4111 | Modal H Code |
| #4113 | Modal M Code |
| #4114 | Modal Sequence Number |
| #4115 | Modal Program Number |
| #4119 | Modal S Code |
| #4120 | Modal T Code |
| #4130 | Modal P Code |
| #5001-#5008 | Previous block end position |
| #5021-#5028 | Present machine coordinate position |
| #5041-#5048 | Present work coordinate position |
| #5061-#5068 | Present skip signal position |
| #5081-#5088 | Present tool offset |
| #5101-#5108 | Servo Position Deviation |
| #5201-#5208 | G52 work offsets |
| #5221-#5228 | G54 work offsets |
| #5241-#5248 | G55 work offsets |
| #5261-#5268 | G56 work offsets |
| #5281-#5288 | G57 work offsets |
| #5301-#5308 | G58 work offsets |
| #5321-#5328 | G59 work offsets |
| #7001-#7008 | G54.1 P1 additional work offsets |
| #7021-#7028 | G54.1 P2 additional work offsets |
| #7941-#7948 | G54.1 P48 additional work offsets |
| #10001-#10999 | Wear offset H-code (Offset #1-#999) |
| #11001-#11999 | Geometry offset H-code (Offset #1-#999) |
| #12001-#12999 | Wear offset D-code (Offset #1-#999) |
| #13001-#13999 | Geometry offset D-code (Offset #1-#999) |