
B–62073E–1/042. INTERFACE BETWEEN CNC AND PMC–NA OR NB
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(e) Rewind signal: RWD
[Classification]
Output signal
[Function] Informs the control unit that the tape is being rewound.
[Output Condition]
The signal goes high when either of the following conditions is satisfied:
i. Rewinding of the tape in the reeled tape reader is started (by the reset and rewind signal
or by manual operation of the tape reader).
ii. The reset and rewind signal is high, but the tape in the reeled tape reader is not rewound.
A parameter can be specified so that the signal is not set high when condition ii is satisfied.
The signal goes low when either of the following conditions is satisfied:
i. The tape in the reeled tape reader has been rewound.
ii. A hundred milliseconds or longer have passed after the signal is set high by the reset and
rewind signal [condition ii above)
NOTE 1 While the tape in the reeled tape reader is being rewound, the rewind signal is output. The
output period of the rewind signal depends on the length of the tape being rewound. The
minimum period the signal is high cannot be predetermined.
NOTE 2 The rewinding time required for a main program in memory is nearly zero. Before the rewind
signal goes low, the tape of the main program is rewound.
2.3.4 Alarm signals
(a) Alarm signal: AL
[Classification]
Output signal
[Function] Informs that the control unit is in the alarm state.
[Output Condition]
The signal goes high when:
i. The control unit enters the alarm state.
The signal goes low when:
i. The control unit is reset or the alarm cancel function is executed to release the alarm
state.
Some alarm states can be canceled only after their causes are eliminated. They cannot be
canceled by resetting the control unit or executing the alarm cancel function. If either action
is attempted, the AL signal may go low momentarily. The control unit then returns to the alarm
state, and the AL signal goes high again.
(b) Alarm classification signals: OTALM, OHALM, SVALM, PSALM, SYALM, [TIALM]
[Classification]
Output signals
[Function] Informs of the current alarm. One the following signals is output according to what the current
alarm is.
Kind of alarm
Corresponding output signal Remark
Overtravel alarm OTALM
Overheat alarm OHALM
Servo alarm SVALM
Common to all
s
stem
Program/error operation alarm PSALM
Control unit fault alarm SYALM
Tool post interference alarm TIALM Only for 15–TT
[Output Condition]
The signal goes high when:
i. The control unit enters the corresponding alarm state.