Universal Robots E Series User Manual

Collaborative
Operation 2011
edition, clause
5.10.4
Technique Explanation UR e-Series
Speed and
separation
monitoring
(SSM) safety
functions
SSM is the robot
maintaining a separation
distance from any
operator (human). This
is done by monitoring of
the distance between
the robot system and
intrusions to ensure that
the MINIMUM
PROTECTIVE
DISTANCE is assured.
Usually, this is
accomplished using
Sensitive Protective
Equipment (SPE), where
typically a safety laser
scanner detects
intrusion(s) towards the
robot system.
This SPE causes:
1. dynamic
changing of the
parameters for
the limiting safety
functions; or
2. a safety-rated
monitored stop
condition.
Upon detection of the
intrusion exiting the
protective device’s
detection zone, the robot
is permitted to:
1. resume the
“higher” normal
safety function
limits in the case
of 1) above
2. resume operation
in the case of 2)
above
In the case of 2) 2),
restarting operation after
a safety -rated
monitored stop, see ISO
10218-2 and ISO/TS
15066 for requirements.
To facilitate SSM, UR robots have the
capability of switching between two sets of
parameters for safety functions with
configurable limits (normal and reduced).
See Reduced Mode on page 4. Normal
operation can be when no intrusion is
detected. It can also be caused by safety
planes/ safety boundaries. Multiple safety
zones can be readily used with UR robots.
For example, one safety zone can be used
for “reduced settings” and another zone
boundary is used as a safeguard stop
input to the UR robot. Reduced limits can
also include a reduced setting for the stop
time and stop distance limits – to reduce
the work area and floorspace.
User Manual 111 UR10e
15.Safety Functions Table 1
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Universal Robots E Series Specifications

General

Brand	Universal Robots
Model	E Series
Category	Robotics
Language	English