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❚
Monitoring the protection area
With the installation program, one can specify two limit values from the sensor head for each of the 600 beams,
which define the distances of the alarm and safety zones. When monitoring, the sensor compares the measured
distance of the object with the limit values specified. The tables of the limit values are determined by the
computer and stored in the sensor. In case of power removal, the sensor will still keep these values and will be
fully operational when power is restored. The alarm and safety zones can have any shape and can be perfectly
adapted to any working environment.
The sensor will always be located within the protection areas as illustrated in Figure 3-3 :
Figure 3-3 : Respective positions for sensor and protection zones
IMPROPER ZONE GUARDING
Position the FF-SE to avoid any non detection zone in the safety zone or use additional safety sensors :
Figure 3-4 : Non detection zones
Failure to comply with these instructions could result in death or serious injury.
❚
Self-checking
Test targets :
Internal self-tests are continually carried out in the FF-SE. Due to these self-tests, the safety of the system can
be assured. All essential components are either redundant, or they are monitored by independent test logic
circuits.
a. Fixed test target:
By measuring the light reflected from the fixed test target, the sensitivity of the sensor is monitored.
Contamination of the optics or the test target can lead to the error message « Error on test target » (LED
displays. See chapter 6.7). In such a case the sensor optics and test target must be cleaned in accordance
with the instructions in « Maintenance procedures. See chapter 6.4».
b. User defined external test target:
To ensure correct positioning, after installation, it is important to use one or more test target placed near the
sensor. A fixed reliable target must be chosen, since it is measured at every revolution. Any change in the
measured value (angle, distance) greater than tolerance of this target (such as unexpected movement of
the sensor in the zones) means a system error and will cause a shut-down of the machine.
IMPROPER USER-DEFINED TEST TARGET POSITIONING
Do not allow access between the sensor head and the user defined fixed target, since this will be detected as
a sensor incorrect positioning and will stop the machine and lock the sensor in error.
FF-SE
FF-SE
Safety zone
POSSIBLE
IMPOSSIBLE
Alarm zone
Safety
zone
Alarm zone
Summary of Contents for SYA14 Series
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