Honeywell SYA14 Series, Manual

Page: 254 / 737

107006-11 EN FR26 GLO 0300 Printed in Germany 46
Indication Possible Cause Corrective Action
The “Alarm” and “Safety” LEDs
illuminate from time to time
without apparent reason Optical head may be slightly
contaminated (fingerprints or
dust). Remove power from the sensor and clean the
optical head (see section 6.4 “Advice on
maintenance”).
The EMI in the environment
exceeds standard specifications. Install an electrical noise filter between the
power supply and sensor.
Power supply voltage may
fluctuate be from a source that
provides power to actuators. Ensure the power supply is not the same
source used for actuators. Replace the power
source as required.
If the scanner is not mounted
directly onto the machine’s body,
the earth ground connection may
be poor or non-existent. A good
ground connection is crucial to
ensure EMI immunity. Ensure a quality earth ground connection
exists via a dedicated wire on the power cable
or ground screw.
Electrical actuator switching,
especially when the coil of an
actuator is NOT protected against
the generation of electrical noise,
may cause false triggering (on
the SAFETY or ALARM output) Install varistor protection to minimize electrical
noise interference.
Light sources or reflective
surfaces (like glass, metal foil
transparent plastic,…) located
around the scanner may cause
false triggering. Remove or block out the light source or the
reflective surfaces. If not possible, change the
angle of the laser scanner to prevent sensing
these sources.
Rain, snow, fog, smoke and dust
may be detected as objects. Protect the scanner from air pollution. Do not
use the scanner outdoors
If a second scanner is located
close to a scanner, the installed
sensor, mutual interference may
occur. Remove the mutual interference caused by
the other FF-SE scanner (see section 4.4
Mounting);
If a light source like a
stroboscope is located close to
the installed sensor, light
interference may exist. Remove the light source causing the
interference.
If the RS232 cable is still
connected to the sensor,
electrical noise interference may
be induced into the sensor. Remove the RS232 cable from the scanner.
An object is detected
intermittently. The installation
environment may have changed
(the detected object could be the
floor). Ensure that no object is detected by the FF-
SE. (consider the required 250 mm (9.8 in)
stand off distance from obtacles). Connect the
computer. Select the function “Monitor” in the
main menu. Modify the environment to its
original installation characteristics or modify
the protection zones.
Moving objects located close to
the limits of safety and alarm
zones may cause detection. Check to see that no moving object is
detected by the FF-SE. Connect the
computer. Select the function “Monitor” in the
main menu. Remove the objects or redefine
the safety and alarm zones.