Mitsubishi Electric Q172CPU Programming Manual page 52

4 POSITIONING DEDICATED SIGNALS
(10) DOG / CHANGE signal (M2414+20n) ...................... Status signal
(a) This signal turns on/off by the proximity dog input (DOG) of the Q172LX at
the home position return in the real mode.
This signal turns on/off by the speed/position switching input (CHANGE) of
the Q172LX at the speed/position switching control in the real mode.
(b) "Normally open contact input" and "Normally closed contact input" of the
system setting can be selected.
The state of the speed/position switching input (CHANGE) when the
CHANGE signal is ON/OFF is shown below.
DOG/CHANGE signal : ON
Q172LX
DOG/CHANGE
(11) Servo ready signal (M2415+20n) .............................. Status signal
(a) This signal turns on when the servo amplifiers connected to each axis are in
the READY state.
(b) This signal turns off in the following cases.
• M2042 is off
• Servo amplifier is not installed
• Servo parameter is not set
• It is received the forced stop input from an external source
• Servo OFF by the servo OFF command (M3215+20n) ON
• Servo error occurs
Refer to APPENDIX 2.5 "Servo errors" for details.
Q61P Q02H Q172
CPU CPU
(N)
POINT
When the part of multiple servo amplifiers connected to the SSCNET becomes a
servo error, only an applicable axis becomes the servo OFF state.
DOG/CHANGE
COM
Q172
LX
Communication is normal
Servo ready signal : ON
AMP AMP
M M
4 - 21
DOG/CHANGE signal : OFF
Q172LX
DOG/CHANGE
DOG/CHANGE
COM
Q38B