FUNCTIONS
62
SAFERY LASER SCANNER
RESPONSE TIME AND SCAN CYCLE SETTING
The response time of the Laser Sentinel is the time from when an object enters the
safety zone to when the OSSD goes to the OFF-status due to the detection of the object.
The Laser Sentinel scans cyclically with a constant speed and it employs 30 ms to do one
co
mplete rotation.
NOTE
NOTE
NOTE
Master Stand Alone OR Stand Alone model 62 (...482) ms
1 Master + 1 Slave device 62 (...482) ms + 10 ms = 72 (...492) ms
1 Master + 2 Slave devices 62 (...482) ms + 20 ms = 82 (...502) ms
1 Master + 3 Slave devices 62 (...482) ms + 30 ms = 92 (...512) ms
NOTE
The response time of the Master Slave system corresponds to the response
time of the logical safety output of the device that goes into STOP and the
network latency time. If the Master device is in STOP, no latency should be
added. If the Slaves are in STOP, then the latency time must be added to
the response time of the single device.
The minimum response time of the safety laser scanner is 62 ms, which is
the time needed by the device to perform two scans.
The number of scans of the response time may be increased if the device is
operating in a dirty environment caused by floating dust particles (in this
case, the user may need to set a higher number of scans before turning off
the OSSDs in order to avoid false detections).
The response time is automatically calculated by DL Sentinel based on the
number of connected devices and scans: from a value of 62 ms to 482 ms,
increasing the number by 30 ms multiples.
In case of Master/Slave configuration, a network latency time = 10 ms
must be added for each Slave device connected on the network.
WARNING
If the safety distance is not appropriate for the application, the machine
may not stop before the dangerous area is reached.
If the application requires changes, this may require reconfiguration of the
safety zones or re-installation of the Laser Sentinel.
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