PS005

Press RESET to clear alarm. Note the alarmed program name and sequence number displayed on CNC screen (O-number and N-number if present).

Navigate to EDIT mode, press PRGRM key, search for the program (address O then program number, press EXEC). Use cursor or search function to locate the exact block where PS005 occurred.

Examine the block for addresses missing numerical data. Common examples: 'G' without code number, 'X' or 'Z' without coordinate value, 'M' without function number, 'S' without spindle speed, 'T' without tool number, 'F' without feedrate value.

Correct the program block by adding the missing numerical value after the address or deleting the incomplete address. Verify EOB (semicolon) placement. Re-run program in single block mode (SINGLE BLOCK button ON) to confirm correction.

If program is write-protected, set parameter 3202#0 (WRITE PROTECT) = 0 or use KEY switch position to enable editing. Restore protection after editing.

Check RS232/Ethernet communication parameters: SETTING screen > I/O CHANNEL settings. Verify parameter 0020 (I/O channel), 0101-0111 (baud rate, stop bits, parity) match external device exactly. Standard Fanuc RS232: 9600 baud, even parity, 2 stop bits.

Review parameters 0100 (I/O device selection), 0110-0112 (protocol settings). For tape format, verify parameter 0020 = 0 or 1. Check parameter 0100 bit settings match DNC software handshaking (XON/XOFF or hardware).

Re-transfer the program from original source. Before transfer, clear existing program (EDIT > DELETE PRGRM). Monitor transfer on PRGRM screen to verify complete data reception without interruption.

Ensure adequate free memory space before transfer. Check SYSTEM > CRT/DSP parameter display for available memory. Delete unused programs if memory insufficient.

If transfer errors persist, test with loopback connector on RS232 port (pins 2-3 shorted) or verify Ethernet cable integrity. Check diagnostic screen SYSTEM > DIAGNOSIS > I/O for communication error counters.

If alarm occurred during MDI operation, press RESET and check MDI PROGRAM screen for the incomplete block. Re-enter complete command with all required address data values.

For macro programs, navigate to EDIT mode and examine macro variable assignments. Check for undefined variables (e.g., 'X#100' where #100 is null/empty). Use SYSTEM > MACRO screen to view current macro variable values (#100-#199 common, #500-#999 available).

Verify macro program logic includes proper variable initialization before use. Add conditional statements (IF[#variable NE #0]THEN...) to prevent null variable assignments to address codes. Check parameter 6001#0 (macro variable protection) is correctly set.

Macro variable #0 represents NULL in Fanuc controls. Assigning #0 to an address creates missing data condition.

Review parameters 6050-6059 (macro call settings) and 6000-6009 (macro options). Ensure bit 6000#0 (Custom Macro B) is enabled if using macro features. Verify macro program syntax follows Fanuc Custom Macro standards.