Mitsubishi MELSEC-Q QD77MS, Руководство пользователя

Страница: 694 / 976

13 - 35
Chapter 13 Control Sub Functions
13.4.4 Hardware stroke limit function
DANGER
When the hardware stroke limit is required to be wired, ensure to wire it in the negative logic
using b-contact. If it is set in positive logic using a-contact, a serious accident may occur.
In the "hardware stroke limit function", limit switches are set at the upper/lower limit of
the physical moveable range, and the control is stopped (by deceleration stop) by the
input of a signal from the limit switch. Damage to the machine can be prevented by
stopping the control before the upper/lower limit of the physical moveable range is
reached.
The hardware stroke limit is able to use "external input signal of QD77MS", "external
input signal of the servo amplifier" or "buffer memory of QD77MS". (Refer to the
"
Pr.80
External input signal selection".)
The details shown below explain about the "hardware stroke limit function".
[1] Control details
[2] Wiring the hardware stroke limit
[3] Precautions during control
[4] When the hardware stroke limit function is not used