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DOC No.
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T202001006
Appendix
A Glossaries
Stop Category 0:
The robot motion is stopped immediately when the power supply of the
robot is turned off. It is an uncontrolled stop, where the robot may deviate from the programmed
path as each joint may brake as fast as possible. This protective stop may be used when a
safety-related assessment limit is exceeded, or when a fault occurs in the safety-related
assessment part of the control system. For more information, please refer to EN ISO13850:2008
or IEC60204-1:2006.
Stop Category 1:
The robot motion is stopped with power available for the robot to achieve
the stop, and the power supply is turned off when the stop is achieved. It is a controlled stop,
where the robot will comply with the programmed path. The power is turned off after one second
or once the robot stands still. For more information, please refer to EN ISO13850:2008 or
IEC60204-1:2006.
Stop Category 2:
It is defined as a controlled stop with power available to the robot. The
robot stops all motions within one second. Through the operation of the safety-related assessment
control system, the robot may stay at the stop position. For more information, please refer to
IEC60204-1:2006.
Diagnostic coverage (DC):
It is used to measure effectiveness of the diagnosis which is
implemented to achieve the assessed performance level. For more information, please refer to EN
ISO13849-1:2008.
Integrator:
The integrator is an organization designing the final installation of the robot.
The integrator is responsible for implementing the final risk assessment, and must make sure that
the final installation comply with the local laws and regulations.
Mean time to dangerous failure (MTTFd):
The MTTFd is defined as a value acquired by
calculation and detection which are implemented to achieve the assessed performance level. For
more information, please refer to ENISO13849-1:2008.
Risk assessment:
The risk assessment is the whole process of identifying all risks and
reducing these risks to an appropriate level. The risk assessment should be recorded and archived.
