Fuji Electric MONITOUCH X1 Series Hardware Specifications page 57

4 X1 Setup Procedures
*1 When [Write filter setting] is set to [Valid], some System Configurator settings cannot be changed.
If a setting cannot be changed, set [Write filter setting] to [Invalid] and then change the intended setting. For details, refer to
Write Filter Setting" page 5-79.
4-4
"Settings that Check the