Create a Rotary Selector Switch (a switch that turns ON bits in order with each touch).
After the power is turned ON and you touch the Selector Switch, the data for each set bit address is read from the device/PLC, that information is stored inside the display unit, and at the same time the Selector action occurs (the bit following the currently selected bit address turns ON). After that, the Selector action occurs without reading the device/address data, based on information stored in the display unit (which bit address was ON last time).
After the first touch, even if the bit address data changes, it will not be reflected right away in the Selector Switch. Data will be overwritten the next time you touch the Switch.
When setting the addresses of multiple devices/PLCs, if a communication error occurs in one of the devices, writing will continue normally to that device until the write occurs, and a write error will be displayed when writing to the device. The displayed write error will be erased once you change screens after communication recovers.