Mitsubishi Electric Q Series, Programming Manual

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4 POSITIONING DEDICATED SIGNALS
(b) When using an absolute position system
1) This signal turns on in the following cases:
• When not executing a home position return once after system start.
• Home position return start in the real mode
(Unless a home position return is completed normally, the home
position return request signal does not turn off.)
• Erase of an absolute data in Motion CPU according to causes, such as
battery error
• Servo error [2025] (absolute position erase) occurrence
• Servo error [2143] (absolute position counter warning) occurrence
• Servo error [2913] (encoder counter error) occurrence
• Major error [1201], [1202], [1203] or [1204] occurrence
• When the "rotation direction selection" of servo parameter is changed.
2) This signal turns off by the completion of the home position return.
CAUTION
When using the absolute position system function, on starting up, and when the Motion
controller or absolute value motor has been replaced, always perform a home position return
in real mode. In the case of the absolute position system, use the sequence program to check
the home position return request before performing the positioning control.
Failure to observe this could lead to an accident such as a collision.
(6) Home position return complete signal (M2410+20n)
........................ Status signal
(a) This signal turns on when the home position return operation using the servo
program has been completed normally.
(b) This signal turns off at the positioning start, JOG operation start and manual
pulse generator operation start.
(c) If the home position return of proximity dog, dog cradle or stopper type using
the servo program is executed during this signal on, the "continuous home
position return start error (minor error: 115)" occurs and it cannot be start
the home position return.
(7) FLS signal (M2411+20n)
(Note-1)
.................................... Status signal
(a) This signal is controlled by the ON/OFF state for the upper stroke limit switch
input (FLS) of the Q172DLX/servo amplifier and bit device
QDS
.
• Upper stroke limit switch input OFF ...... FLS signal: ON
• Upper stroke limit switch input ON ........ FLS signal: OFF