Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 113)

Manual/MDI Operation Modes
Chapter 4
4-13
3. Pressing the [TRANSMIT] key transmits the blocks to control memory.
Once the blocks have been sent to control memory, you cannot send
any more MDI blocks until all of the previous set has been executed.
The control displays the first 4 blocks of the MDI program entered
on lines 17-20 with an ! (exclamation point) just to the left of the
blocks. If you insert lines by using MDI within a program selected
for automatic execution, the control inserts the MDI blocks just
before the next block to be executed.
If you need to abort the MDI program due to an error in the MDI
program or any other reason, discard the MDI program by executing
a control reset operation.
4. The MDI blocks can then be executed continuously by pressing the
<CYCLE START> button in either the AUTO or MDI mode. The single
block, block retrace, and jog retract features are also available for
MDI programs (refer to sections 7.1.4, 7.10, and 7.9 respectively for
details on these features).
The control displays an “@” symbol next to any MDI blocks that
have been executed.
The error message:
“NO MORE MDI BLOCKS”
appears if you press cycle start in the MDI mode when there are no
more MDI blocks remaining in memory to be executed.
If: Then:
the MDI blocks were entered
into an executing part program the control returns to automatic mode and continues executing
the part program.
you execute the MDI program in
the MDI mode execution halts when the control encounters the first block of
the part program.