What causes FANUC alarm 097?

Operator attempted a P-type program restart immediately after powering on the machine without first running any automatic cycle. A previous alarm (0094-0097) was reset and the operator tried to use P-type restart before executing any automatic operation to re-establish position history. The CNC memory of the last automatic operation position was lost due to power cycle, and P-type restart requires a prior automatic run reference point. Operator selected program restart function and chose P-type sequence number search without understanding the machine state requirement.

How do I fix FANUC alarm 097?

1. Do not use P-type restart immediately after power ON or after clearing alarms 0094-0097. The control needs a completed automatic operation in its memory first. 2. Run the program from the beginning using a normal cycle start to complete at least one full automatic operation. This establishes the reference the control needs for P-type restart. 3. After a successful automatic cycle completes, you can then use P-type restart to resume from a specific sequence number if needed. 4. If you need to restart mid-program after a power loss, consider using Q-type restart or manually positioning the machine to the correct location before resuming, as P-type is not available in this machine state. 5. Check your restart method selection in the program restart screen and switch from P-type to an appropriate restart method that is valid for the current machine state.

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FANUC Controller

Program/G-code · Basic · 5-15 minutes

Alarm 097

Fanuc Alarm 097 - P TYPE NOT ALLOWED (AUTO EXEC)

Fanuc Alarm 097 occurs when attempting to restart a program using P-code (program number specification) immediately after power-on or after resetting alarms 094-097, without having executed automatic operation first. The system requires at least one complete cycle of automatic operation before allowing P-type restart to establish proper program context and synchronization.

FANUCProgram/G-codeBasic5-15 minutes

097

Fanuc Alarm 097 - P TYPE NOT ALLOWED (AUTO EXEC)

Memory Overflow

Root Cause Summary

Fanuc Alarm 097 occurs when attempting to restart a program using P-code (program number specification) immediately after power-on or after resetting alarms 094-097, without having executed automatic operation first. The system requires at least one complete cycle of automatic operation before allowing P-type restart to establish proper program context and synchronization.

Safety

Backup before deleting
Backup all important programs and data before deleting anything.
Ensure the machine is in a safe state (e.g., powered down or in emergency stop) before performing any memory management tasks.
Be aware of the potential for data loss when deleting programs. Double-check that you are deleting the correct files.
If upgrading memory, follow the manufacturer's instructions carefully to avoid electrical shock or damage to the machine. Disconnect power before opening any electrical panels.
Static discharge can damage electronic components. Use proper grounding techniques when handling memory modules.
Backup all data before deleting any programs

Causes and Fixes

1
Press RESET to clear alarm 097. Navigate to current program position and verify program is loaded in SYSTEM > PROGRAM display.
2
Execute at least one complete automatic cycle in AUTO or MEM mode from program start (no P-type restart) to allow the CNC to establish program flow context.
3
After successful automatic operation completion, P-type restart will be enabled. Verify parameter 3109 (restart enable settings) is properly configured if restart functionality is required.
4
If restart after power-on is frequently needed, consider using sequence number (N-code) restart instead of P-type restart, or modify operational procedures to include an initial auto cycle after power-on.

DIY Feasiblehigh confidence

Call a technician if:

·Memory hardware failure suspected
·Parameter corruption persists after reset
·Alarm returns after all software solutions attempted

Prevention

Maintain adequate free memory (>20%)
Avoid P-type restart after power cycles
Regular memory cleanup of unused programs
Proper system shutdown procedures

Common Mistakes

Attempting P-type restart immediately after power-on
Ignoring memory usage warnings
Loading excessively large programs without memory check
Not backing up before memory operations

Related Alarms

094 095 096 098 099

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