What causes FANUC alarm 045?

The G-code program is missing the address Q parameter to specify the cut amount per pass in the high-speed peck drilling or peck drilling cycle. The address Q parameter is specified as Q0, which is not a valid value for the cut amount per pass. The G-code program is using an unsupported or incorrect G-code cycle that requires the address Q parameter.

How do I fix FANUC alarm 045?

1. Review the G-code program and locate the high-speed peck drilling or peck drilling cycle (G73 or G83) where the alarm is occurring. 2. Verify that the address Q parameter is present and set to a valid non-zero value to specify the cut amount per pass. 3. If the address Q parameter is missing, add it to the G-code program with an appropriate value for the application. 4. If the address Q parameter is set to Q0, change it to a positive non-zero value to specify the desired cut amount per pass. 5. Ensure that the G-code program is using the correct G-code cycle that is supported by the Fanuc control. 6. Upload the corrected G-code program to the Fanuc control and test the operation to verify the alarm is resolved.

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FANUC Controller

Program/G-code · Intermediate · 15-30 minutes

Alarm 045

Fanuc Alarm 045 - ADDRESS Q NOT FOUND (G73/G83)

Fanuc Alarm 045 occurs when G73 (high-speed peck drilling) or G83 (peck drilling cycle) is commanded without a valid Q address value specifying the incremental drill depth per peck. The Q value must be present and non-zero for the canned cycle to execute properly.

FANUCProgram/G-codeIntermediate15-30 minutes

045

Fanuc Alarm 045 - ADDRESS Q NOT FOUND (G73/G83)

FANUC ALARM 45

Root Cause Summary

Fanuc Alarm 045 occurs when G73 (high-speed peck drilling) or G83 (peck drilling cycle) is commanded without a valid Q address value specifying the incremental drill depth per peck. The Q value must be present and non-zero for the canned cycle to execute properly.

Causes and Fixes

1
Review the active program line in EDIT or MEM mode. Locate the G73 or G83 block and verify the Q address is present (example: G83 X_ Y_ Z_ R_ Q_ F_).
2
Check that the Q value is greater than zero and specified in millimeters or inches according to G20/G21 modal state. Typical values range from Q0.5 to Q5.0 depending on application.
3
Correct the program by adding or modifying the Q value (example: G83 Z-50. R3. Q5. F100). Press RESET to clear alarm 045, then restart the cycle.
4
If using a subprogram or macro call, verify Q is not being passed as a null variable. Check variables #1-#33 via OFFSET/SETTING > MACRO VARIABLES if applicable.

DIY Feasiblehigh confidence

Call a technician if:

·Macro variable system errors persist
·Parameter corruption suspected
·Control software issues

Prevention

Always include Q address when programming G73/G83 cycles
Use drilling cycle templates or standard formats
Initialize macro variables in program header
Validate Q values are appropriate for material and tool

Common Mistakes

Copying G81 format and changing to G83 without adding Q
Setting Q0 thinking it means 'automatic' peck amount
Using undefined macro variables for Q values
Confusing Q (peck amount) with P (dwell time) addresses

Related Alarms

044 046 078 136

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