Contents of GLC settings are saved to SRAM(When the power will be turned OFF, as this memory will be initialized, it is saved by the battery.) If you enter the monitoring mode of a logic program, [Enable I/O] setting (it enable to use Input/Output units connected GLC) at Pro-Control editor is selected and you turn the power OFF for long time, the battery of GLC100 may discharge electricity. After that, you turn ON the power of GLC, SRAM will be initialized and [Enable I/O] will be turn OFF (Disable).

Transfer a default value of System variable,#COMMAND, according to the following setting. If you transfer a default value, even if the battery will discharge,[Enable I/O] setting never turn OFF(Disable).

Show the variable list at the Pro-Control editor, select the System variable,#COMMAND and right click.
The menu for changing the current data is show, Set 130(Dec).
Save your project file and transfer the logic program again.