
B–63833EN–1/02
5. AUTOMATIC OPERATION
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When automatic operation start signal ST is set to 1 then 0 while the CNC
is in memory (MEM) mode, DNC operation mode (RMT), or manual data
input (MDI) mode, the CNC enters the automatic operation start state then
starts operating.
Signal ST, however, is ignored in the following cases:
1. When the mode is other than MEM, RMT, or MDI
2. When the feed hold signal (*SP) is set to 0
3. When the emergency stop signal (*ESP) is set to 0
4. When the external reset signal (ERS) is set to 1
5. When the reset and rewind signal (RRW) is set to 1
6. When MDI RESET key is pressed
7. When the CNC is in the alarm state
8. When the CNC is in the NOT READY state
9. When automatic operation is executing
10.When the program restart signal (SRN) is 1
11.When the CNC is searching for a sequence number.
The CNC enters the feed hold state and stops operation in the following
cases during automatic operation:
1. When the feed hold signal (*SP) is set to 0
2. When the mode is changed to manual operation mode (JOG, INC,
HND, REF, TJOG, or THND).
The CNC enters the automatic operation stop state and stops operating in
the following cases during automatic operation:
1. When a single command block is completed during a single block
operation
2. When operation in manual data input (MDI) mode has been completed
3. When an alarm occurs in the CNC
4. When a single command block is completed after the mode is changed
to other automatic operation mode or memory edit (EDIT)
The CNC enters the reset state and stops operating in the following cases
during automatic operation:
1. When the emergency stop signal (*ESP) is set to 0
2. When the external reset signal (ERS) is set to 1
3. When the reset and rewind signal (RRW) is set to 1
4. When MDI RESET key is pressed
The state of the CNC (automatic operation start, feed hold , automatic
operation stop, or reset) is posted to the PMC with status output signals
OP, SPL, and STL. See the table in the “Signal” section for details.
5.1
CYCLE START/
FEED HOLD
General
D Start of automatic
operation (cycle start)