Stopping Times Of The Safety System; Limiting Safety-Related Functions - Universal Robots UR10/CB3 User Manual

Limiting Safety Function
TCP force
Momentum
Power

1.6.2. Stopping times of the Safety System

The stopping time of the safety system is the time from a fault or violation of a safety-related
function occurs to the robot is brought to a complete stop and the mechanical brakes are
engaged.
The maximum stopping times in the table must be considered if the safety of the application
relies upon the stopping time of the robot. E.g. if a fault in the robot results in a stop of a
complete factory line, where certain actions must take place immediately after the stop, the
maximum stopping times must be considered.
The measurements are conducted with the following configuration of the robot:
• Extension: 100% (the robot arm is fully extended horizontally).
• Speed: The TCP speed limit of the safety system is set to the described limit.
• Payload: maximum payload handled by the robot attached to the TCP ( 10 kg ).
The worst case stopping time for Stop Category
interfaces can be seen in the following table.
TCP Speed Limit
1.0 m/s
1.5 m/s
2.0 m/s
1.5 m/s
3.0 m/s

1.6.3. Limiting Safety-related Functions

Advanced path control software decreases speed or issues a program execution stop if the robot
arm approaches a safety-related limit. Violations of limits will hence only occur in exceptional
cases. Nevertheless, if a limit is violated, the safety system issues a Stop Category 0.
The system is considered de-energized when the 48 V bus voltage reaches an electrical potential
below 7.3 V. The de-energizing time is the time from a detection of an event until the system has
been de-energized.
UR10
Description
Max. pushing force of the robot TCP
Max. momentum of the robot arm
Max. applied robot arm power
1
0 in case of a violation of the safety limits or
14
Maximum Stopping Time
450 ms
500 ms
550 ms
600 ms
650 ms
User Manual