10. Safety system
MiR1000 Shelf Lift User Guide (en) 12/2020 - v.2.1 ©Copyright 2019-2020: Mobile Industrial Robots A/S.
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MiR Shelf Lift safety functions
MiR Shelf Lift uses the electrical interfaces between the top module and the robot to
communicate safety related information that is used for additional safety features. This
includes monitoring the lift position to make sure the robot drives with the correct
behaviour and checking the lift controller status for errors that may indicate that the lift is
not working correctly.
These functions are described in further detail in the following sections.
The diagram in
shows the inputs to these functions and how they are all
connected and monitored in the safety PLC. The safety PLC is able to switch the safety
contactors to cut off power to the robot motors and the top module whenever a Protective
or Emergency stop is triggered. Also, the safety PLC sends information to the robot computer
to be displayed in the robot interface (go to
Monitoring > Hardware health
) and to indicate
the robot's status through the status lights and the speaker.