
B–64113EN–1/01
2. PREPARATIONS FOR OPERATION
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The mode select signal is a code signal consisting of the three bits MD1,
MD2, and MD4.
The following seven modes can be selected.
D Memory edit (EDIT)
D Memory operation (MEM)
D Manual data input (MDI)
D Manual handle/incremental feed (HANDLE/INC)
D Manual continuous feed (JOG)
D TEACH IN JOG
D TEACH IN HANDLE
And in addition, DNC operation mode can be selected by combining the
(MEM) mode setting and the DNCI signal. Manual reference position
return mode can be selected by combining the manual continuous feed
(JOG) mode setting and the ZRN signal.
The currently selected operation mode can be posted by outputting the
operation mode check signal.
[Classification] Input signal
[Operation] As shown in the following table, the mode select signal is a grey code (a
code in which only one bit is different from that of the adjacent mode).
To prevent faulty mode switching, use an overcrossing contact rotary
switch so that only one bit changes from that of the adjacent mode.
An example of ”Faulty mode switching” would be:
When the mode is switched to the EDIT mode during memory operation,
the CNC enters the single block state and the operation stops at the end
of the executing block.
2.6
MODE SELECTION
General
Signal
Mode selection signal
MDI, MD2, MD4
<G043#0 to #2>
DNCI <G043#5>
ZRN <G043#7>