061

Press RESET to clear the alarm, then enter EDIT mode and navigate to the alarmed program block using the cursor keys or SEARCH function.

Verify the G70/G71/G72/G73 block contains both P and Q addresses (e.g., G71 U2.0 R1.0 P10 Q20). P and Q must reference existing sequence numbers (N numbers) in the program.

Check that the sequence numbers referenced by P and Q exist in the program and define a valid tool path. For G71/G72, this defines the finish profile. For G70, this defines the area to finish after roughing.

Correct the block to include both P and Q addresses with valid sequence number values, then execute the program in SINGLE BLOCK mode to verify proper operation.

Ensure P value is less than Q value and both sequence numbers exist in sequential order in the program.

In EDIT mode, examine the G70/G71/G72/G73 block character-by-character for typographical errors such as '0' (zero) instead of 'O', lowercase 'p' or 'q' instead of uppercase, or extra spaces between address and value.

Verify P and Q values are integers without decimal points (e.g., P100 not P100.0). Check for special characters or non-numeric values following the P or Q address.

If program was transferred via DNC or external device, check parameter 0020 (TV check) and 0021 (tape input check) for communication format settings that may cause character corruption during transfer.

Re-type the complete G70/G71/G72/G73 block ensuring proper syntax: G7X U__ R__ P__ Q__ [additional addresses]. Use MDI mode to test the corrected block syntax before editing the main program.

Always backup program to external memory before making extensive edits.

Check if the alarming block contains a block skip symbol (/) at the start. Verify optional block skip switches on the control panel and parameter 3404 bit 5 (BDT) to determine if block skip is active.

If using macro programming (custom M-codes or G65/G66), check that P and Q values are properly assigned to variables before the canned cycle call. Use SYSTEM > CURRENT (variable display) to monitor macro variable values during execution.

Macro variable #0 (null/unassigned) used for P or Q will trigger this alarm.

Review program structure for logic errors where G70-G73 blocks may be called from subprograms or subroutines without proper P/Q address inheritance. These addresses must be in the same block as the G-code.

Execute program in SINGLE BLOCK mode with SYSTEM > DIAGNOSIS screen 300-311 (PMC signal trace) active to monitor program flow and identify conditional branching that may bypass required address specification.

Contact your machine tool builder if custom macro or ladder logic is involved in canned cycle execution.