Figure 51. Edge triggered pattern timing diagram
t < 400 ms
Override Conditions
OFF
ON
24Vdc
Override 2
0Vdc
24Vdc
Override 1
0Vdc
ON
Override Status
OFF
In either configuration, when the override signal is accepted the display will show Override and the OSSD LED will be green.
Mute-Dependent Override function allows the user to manually force the OSSD outputs on for up to the configured maximum
override time (120 seconds). To initiate an override, the scanner's Safety Zone must be violated with the OSSD outputs off
and at least one mute device must be blocked (on). The override function automatically terminates when one of the following
happens:
•
The interruptions of the safety zone are cleared (in bidirectional-muting configuration)
•
All the mute sensor inputs are de-actuated (switched to the off state) (in a bidirectional-muting configuration)
•
The 120 second maximum override time limit has expired
•
Either override input returning to their normal state (Override 1 going open or Override 2 going closed) (when
configured for level triggered)
•
All the muting sensors are de-actuated and no beams of the Safety Zone are interrupted (in a unidirectional-muting
configuration)
The SX's outputs stay on at the end of the override sequence (assuming the SX's Safety Zone is clear, and it is configured
for Automatic Restart).
CAUTION:
Single Line Pattern and Edge Triggered: After the override starts, changing the state of the
override switches has no affect on the override function. Engaging an e-stop or releasing the machine's
hold-to-run switch can be used to stop the process. Conduct a risk assessment to ensure this cannot
create a hazardous situation.
6.2.8 Muting Function T (X) (Bidirectional) or L (Unidirectional)
Selection
The SX has multiple muting configurations. The SX can monitor and respond to muting sensors in the Bidirectional or
Unidirectional configuration.
Configure the directional setting of the muting on the
Input Configuration
screen. The configuration can also select total
(mute the entire safety zone) or partial (mute just a defined section of the safety zone) muting.
Factory default setting
: Bidirectional
Use the X configuration when the SX is mounted vertically and Bidirectional is selected in the configuration. The X
configuration uses two muting sensors (e.g. two pairs of opposed-mode photoelectric sensors as shown below). The crossing
point of the two sensing paths must be on the hazardous side of the Safety Zone.
SX Safety Laser Scanner
72
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