PS0075

Press SYSTEM > PROGRAM, select the protected program and verify if '****' asterisks or lock symbol appears next to program number indicating protection status.

Check program header for protection code format: O1234(PROTECT) or O1234(****). If present, this designates write protection at program level.

Navigate to EDIT mode, input program number, press ALTER key then input G10 L50 P1 R0; to remove protection (if parameter 3202#0 PWE=1 allows this operation). R1 re-enables protection.

G10 L50 write protection removal only works if system parameters permit program editing. Backup program before attempting removal.

If protection cannot be removed via G10, access SYSTEM > PROGRAM, highlight protected program, press [OPRT] softkey then [PROTECT] softkey to toggle protection OFF if parameters allow operator access.

Navigate to SYSTEM > PARAM > PARAMETER WRITE switch on control panel (or softkey), set KEY switch to 1 position to enable parameter modification access.

Parameter changes require machine builder or supervisor authorization. Document original settings before modifications.

Access parameter 3202, verify bit 0 (PWE - Program Write Enable): 0=editing prohibited, 1=editing allowed. Set bit 0=1 to enable program editing capability.

Check parameter 3202 bit 1 (PRT - Program Protection): 0=protection valid, 1=protection ignored. If all programs need editing access, set bit 1=1 temporarily to override individual program protections.

Setting 3202#1=1 removes all program protections system-wide. Return to original setting after editing to maintain security.

Cycle power OFF then ON after parameter changes, or press RESET button. Return PARAMETER WRITE switch to 0 position. Verify edit capability by attempting program modification.

Verify physical KEY switch position on operator panel: Position 0=basic operation, Position 1=program edit allowed, Position 2=parameter access. Set to position 1 or higher for program editing.

KEY switch positions vary by machine builder configuration. Consult machine documentation for specific position functions.

Navigate to SYSTEM > PARAM, check parameter 3290 (key switch simulation). Bits 0-2 simulate KEY positions: set appropriate bits to enable editing level access without physical key switch.

Review parameter 3203 bits 0-7 for additional program operation restrictions (background edit, program name protection, etc.). Verify no restrictive bits conflict with required editing operations.

If using Data Server or network programming, check parameter 3210#2 (remote buffer protection) and 3210#3 (protection signal). These may block program modifications from external sources.