SICK MLG-2 Prime

10 Troubleshooting
This chapter describes how to identify faults on the MLG-2.
10.1 Response to faults
CAUTION
Ce
ase operation if the cause of the malfunction has not been clearly identified.
Immediately put the machine out of operation if you cannot clearly identify the fault and
if you cannot safely remedy the problem.
10.2 SICK support
If you cannot remedy the error with the help of the information provided in this chapter,
plea
se contact your respective SICK subsidiary.
10.3 LED indicators and error indicators
This section explains what the LED error indicators mean. The status indicators are
descr
ibed in a separate section see "Display and operating elements", page 22.
LEDs on the front of the sender
Table 22: LED indicators on the sender
Yellow LED Red LED Green LED Meaning
o o o
Supply voltage off or too low
o o O
Supply voltage on
Ö 1 Hz o O
Test input active
o O o
Hardware error
LEDs on the front of the receiver
Table 23
: LED indicators on the receiver
Yellow LED Red LED Green LED Meaning
o o o
Supply voltage off or too low
o o O
1
Supply voltage on
O o O
1
Light path blocked (at least one beam blocked)
o o Ö 1 Hz
1
IO-Link communication
Ö 1 Hz o O
1
Teach-in active
Ö 3 Hz o O
1
Contamination warning or alignment aid active
and alignment poor
Ö Ö Ö
F
ind-me function active (only via IO-Link)
If multiple MLG-2s are installed in one applica‐
tion, you can activate the “Find Me” function to
identify a certain MLG-2.
o Ö 10 Hz o
Error occurred during teach-in, at least one beam
bloc
k
ed
o O o
Hardware error
O O o
Synchronization error: both sync beams blocked
o O O
Short-circuit
1
If IO-Link is connected, the green LED always flashes at 1 Hz.
TROUBLESHOOTING 10
8018715.16YM / 2020-02-13 | SICK O P E R A T I N G I N S T R U C T I O N S | MLG-2 Prime
49
Subject to change without notice