11
SLG 420
Operating instructions
Safety light grid
EN
5. Hazardous machine parts do not move when the protection field is
interrupted.
6. The hazardous machine movement comes to standstill, when the
voltage supply of the SLG 420 is switched off.
5.4 Half-yearly inspection
The following items must be checked every six months or when a ma-
chine setting is changed.
1. Machine stops or does not inhibit any safety function.
2. No machine modification or connection change, which affects the
safety system, has taken place.
3. The outputs of the SLG 420 are correctly connected to the machine.
4. The total response time of the machine does not exceed the respon-
se time calculated during the first putting into operation.
5. The cables, the connectors, the caps and the mounting angles of the
GLS 420 are in perfect condition.
5.5 Cleaning
If the optics cover of the sensors is extremely soiled, the OSSD outputs
of the SLG 420 can be disabled. Clean with a soft cloth without exer-
cising pressure. The use of agressive, abrasive or scratching cleaning
agents, which could attack the surface, is prohibited.
5.2 Maintenance
Do not use the SLG 420 before the next inspection is termi-
nated. An incorrect inspection can lead to serious and mortal
injuries.
Conditions
For safety reasons, all inspection results must be archived. The opera-
ting principle of the SLG 420 and the machine must be known in order
to be able conducting an inspection. If the fitter, the planning technician
and the operator are different persons, please make sure that the user
has the necessary information at his disposal to be able conduct the
maintenance.
5.3 Regular check
A regular visual inspection and functional test, including the following
steps, is recommended:
1. The safety light grid does not have any visible damages.
2. The optics cover is not scratched or soiled.
3. Hazardous machinery parts can only be accessed by passing
through the protection field of the SLG 420.
4. The safety distance of the application exceed the mathematically
calculated one.
Operate the machine and check whether the hazardous movement
stops under the hereafter-mentioned circumstances.
6. Diagnostic
6.1 LED status information
Receiver
Function
LED colour
Description
Multifunction
Blanking
Signal reception
Restart
OSSD OFF
OSSD ON
Protection field
Multifunction
green
Function display, beam coding
Blanking
blue
Protection field(s) inactive (blanking)
Signal reception
orange
Safety-monitoring module of signal reception
Restart
yellow
Input for command device
OSSD OFF
red
Safety outputs signal condition OFF
OSSD ON
green
Safety outputs signal condition ON
Transmitter
Function
LED colour
Description
Transmitting
Status
Protection field
Transmitting
orange
Transmitter active
Status
green
Function display, beam coding
Receiver
LED
Status LED
Description
OSSD ON
ON
Protection field clear
Flashing
Diagnostic mode active
OSSD OFF
ON
Protection field interrupted, system or configuration error
Flashing
Diagnostic mode active, error output refer to Fault diagnostic table
Restart
ON
Start or restart interlock (manual reset) active, signal expected at output WA
Signal reception
ON/flashing
Signal reception too low, check alignment and installation height between transmitter and receiver
Cleaning the black profile cover
OFF
Alignment between transmitter and receiver OK
Blanking
1 flashes
Fixed beam blanking
Multifunction
Flashing
Beam coding A is active
Transmitter
LED
Status LED
Description
Transmitting
ON
Standard operation, transmitter active
Flashing
Configuration error
Status
Flashing
Beam coding A is active