Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 186)

Running a Program
Chapter 7
Running a Program
Chapter 7
7-4
In single block mode, the control executes the part program block by
block. Each time the <CYCLE START> button is pressed, the control
executes one block of commands in the part program when in single block
mode.
Figure 7.1
Single Block
SINGLE
BLOCK CYCLE
START
When <CYCLE START> is pressed, one
block of commands is executed
Cutting tool
Workpiece
To activate the single block function, press the <SINGLE BLOCK>
button. The light inside the button lights up when active.
If the <SINGLE BLOCK> button is pressed while the control is running a
part program in the automatic or MDI mode, the control activates the
single block function after it completes the commands in the block that is
currently being executed.
The <SINGLE BLOCK> button is a toggle switch. If pressed again while
the single block function is active, the function is canceled and the light
inside the button turns off. The remaining program blocks can be executed
as normal by pressing the <CYCLE START> button.
7.1.4
Single Block