1.Safety, Operation Panel, Teach Pendant (1) Safety

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1.1.10.Safety Functions

1.1.10.1Safety Control Chain of Operation

The robot's safety system is based on a two-channel safety circuit that is continuously monitored. If an error is detected, the power supply to the motors is switched off and the brakes engage. To return the robot to MOTORS ON mode, the two identical chains of switches must be closed. As long as these two chains differ, the robot will remain in the MOTORS OFF mode. Furthermore, when safety cuicuit is disconnected, interrupting call will be sent automatically to the Controller to find out the reason for the interruption.

 

Arm

Limit Switch

interference

 

Emergency A

Emergency B

&

Safe guard A

Safe guard B

Contactor

Drive

Unit

MOTORS ON

AUTOMANUAL

Motor

The safety control chain of operation is based on dual electrical safety chains which interact with the robot controller and the MOTORS ON mode.

Electrical safety chain consist of several switches connected in such a way that all of them must be closed before the robot can be set to MOTORS ON mode. MOTORS ON mode means that drive power is supplied to the motors.

If any contact in the safety chain of operation is open, the robot always reverts to MOTORS OFF mode. MOTORS OFF mode means that drive power is removed from the robot's motors and the brakes are applied. MOTORS OFF mode means the status that there is no power supply to motor of robot while brake of motor is woking. The status of the switches is displayed on the teach pendant (Refer to the I/O monitoring screen of Service Menu in Chapter 6).

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Hyundai HI4 operation manual Safety Functions, Safety Control Chain of Operation