
B–63523EN–1/03
2. PREPARATIONS FOR OPERATION
430
For this example mode switching, only MD2 should change from 0 to 1.
However if a transient signal status change were to occur in a signal other
than MD2 during mode switching, another mode (manual continuous
feed mode, for example) would be set between automatic operation mode
and memory edit mode. When manual continuous feed mode is set while
the CNC is in automatic status, the CNC immediately stops memory
operation. As a result, although the operator intended to switch the mode
to the memory edit mode, the transient signal caused the CNC to be placed
in feed hold state instead.
Signal status
MD4 MD2 MD1 DNCI ZRN
1
Memory edit (EDIT)
0 1 1 0 0
2
Memory operation (MEN)
0 0 1 0 0
3
Manual data input (MDI)
0 0 0 0 0
4
Manual handle/incremental feed
(HANDLE/INC)
1 0 0 0 0
5
Manual continuous feed (JOG)
1 0 1 0 0
6 TEACH IN HANDLE (THND) 1 1 1 0 0
7 TEACH IN JOG (TJOG) 1 1 0 0 0
8 DNC operation (RMT) 0 0 1 1 0
9
Manual reference position return
(REF)
1 0 1 0 1