L-INX User Manual
43
LOYTEC
Version 4.0
LOYTEC electronics GmbH
must be selected to ensure that the device‘s temperature does not exceed the specified range
(see Chapter 18).
3.4 LED signals
3.4.1 Power LED
The power LED lights up green when power is supplied to the power terminals.
3.4.2 Status LED
This LED is available on L-INX models 10X, 11X, 20X, 21X only. The device is equipped
with a red status LED (see Figure 24). This LED is normally off. During boot-up the status
LED is used to signal error conditions (red). If the fall-back image is executed the status
LED flashes red once every second.
3.4.3 OPC LED
The OPC Server LED illuminates green when at least one OPC client is connected to the
OPC server. The LED flickers on OPC XML-DA traffic activity.
3.4.4 PLC LED
The three-color PLC LED indicates the state of the IEC61131 kernel and the IEC61131
program (see Figure 24). Table 2 shows the different LED patterns and their meaning.
Behavior
Description
Comment
GREEN permanent
No IEC61131 program running
The IEC61131 kernel is running but
either there is no IEC61131 program to
execute or the program execution was
stopped.
GREEN flashing at 1
Hz
Normal condition, IEC61131
program running
The IEC61131 kernel and program were
successfully loaded. The IEC61131
program is executed.
ORANGE
IO driver disabled
The IO driver is disabled, that is that no
updates from or the IEC61131 program
were handled.
RED
CPU overload
CPU load exceeded 80%. Modify the
PLC program to reduce CPU load in
order to guarantee normal system
operation (for example, reduce the cycle
time of the program).
OFF
IEC61131 kernel not started
A problem occurred while starting the
IEC61131 kernel. No IEC61131 features
available.
Table 2: PLC LED Patterns
3.4.5 FT Activity LED
The FT port on the device has a three-color LED (green, red, and orange, see Figure 24).
Table 3 shows different LED patterns of the port and their meaning.
