Delta ASD-A3-0121, Руководство пользователя

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ASDA-A3 Wiring
Revision December, 2017
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3.10.4 How does the STO function work?
The STO function is controlled by the motor current from two individual circuits. It cuts off the
power supply to the motor when needed, after which the motor is free from torque force. Table 1
details how this function works.
Table 1: actions description (ON = 24V; OFF = 0V)
Signal Channel Status of opto-isolator
STO
STO_A
~ / STO_A
ON ON OFF OFF
STO_B
~ / STO_B
ON OFF ON OFF
Servo Drive Output Status Ready
Torque off
(STO_B lost)
Torque off
(STO_A lost)
Torque off
(STO Mode)
(1) Description of the STO alarm:
See the diagram below. When the motor runs normally (Servo On), but both STO_A and STO_B
signals are low for 10 ms at the same time, AL500 occurs and the drive is in the Servo Off state.
STO_A
STO_B
S_ON
Servo
status
H
H
L
L
ON OFF
Servo on Servo off & AL500
10 ms