Mitsubishi QD75P1N User Manual page 85

3 SPECIFICATIONS AND FUNCTIONS
Signal name
Near-point dog signal (DOG)
Stop signal (STOP)
External command signal
(CHG)
Common (COM)
Drive unit READY (READY)
Drive unit READY common
(RDYCOM)
Deviation counter clear
(CLEAR)
Deviation counter clear common
(CLRCOM)
Pin No.
AX1 AX2 AX3 AX4
• This signal is used for detecting the near-point dog during OPR.
1A3 1B3 2A3 2B3
• The near-point dog signal is detected at turning from OFF to ON.
• Input this signal to stop positioning.
• When this signal turns ON, the QD75 will stop the positioning being
1A4 1B4 2A4 2B4 executed.
After that, even if this signal is turned from ON to OFF, the system will not
start.
• Input a control switching signal during speed-position or position-speed
switching control.
• Use this signal as the input signal of positioning start, speed change request,
1A5 1B5 2A5 2B5
and skip request from an external source.
Set the function to use this signal in "
selection".
1A6 1B6 2A6 2B6 • Common for upper/lower limit, near-point dog, stop, and external command
1A7 1B7 2A7 2B7 signals.
• This signal turns ON when the drive unit is normal and can accept the feed
pulse.
• The QD75 checks the drive unit READY signal, and outputs the OPR request
if the system is not in the READY state.
1A11 1B11 2A11 2B11 • When the drive unit is inoperable, such as if an error occurs in the drive unit's
control power supply, this signal will turn OFF.
• If this signal is turned OFF during positioning, the system will stop. The
system will not start even if this signal is turned ON again.
• When this signal turns OFF, the OPR complete signal will also turn OFF.
1A12 1B12 2A12 2B12 • Common for drive unit READY signal.
• This signal is output during machine OPR. (Note that it is not output during
the count method
(Example) When machine OPR is carried out in the stopper
1A13 1B13 2A13 2B13
CLEAR
• The output time of the deviation counter clear signal is set in "
Deviation counter clear signal output time".
• Use the drive unit that can reset the droop pulse amount in the internal
deviation counter when the QD75 turns this signal ON.
(Note) The deviation counter clear is a signal output by the QD75 during
1A14 1B14 2A14 2B14 • Common for deviation counter clear signal
Signal details
(Negative logic is selected by external I/O signal logic selection)
2 .)
Speed
OPR speed
Pr.46
Near-point dog
machine OPR. It cannot be output randomly by the user.
3 - 25
MELSEC-Q
Pr.42
External command function
2
Creep speed
Pr.47
Zero signal
Pr.55 Deviation counter
clear signal output time
After feed pulse output stops
method.
Stopper
Time
OFF
ON
OFF
ON
Pr.55