Single Block Switch[SBK]When this switch is pressed, the indicator in the switch is lit and the single block function becomes valid.When this switch is pressed again, the indicator in the switch goes off and the single block function becomes invalid. The single block function executes a program block by block in the automatic mode.This function is used to check a program block by block in test cutting, etc.A "block" refers to one line of the program, ending with the EOB code(:),displayed on the screen.