LED Descriptions
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netRAPID Chip Carrier | Getting Started
DOC131104GS04EN | Revision 4 | English | 2017-09 | Released | Public
© Hilscher 2014 - 2017
5.8 Open Modbus/TCP LEDs on NRPEB 51-RE and NRPEB
52-RE
The subsequent table describes the signals of the Open Modbus/TCP
RUN
and
ERR
LEDs. These LEDs are represented on the Evaluation Boards by
the
COM0
and
COM1
LEDs. The LEDs on the RJ45 sockets are also
described.
LED
Color
State
Meaning
RUN
Name in the
device drawing:
COM0
Number in the
device drawing:
Duo-LED red/green
(green)
On
Connected
: OMB task has communication. At least one TCP
connection is established.
(green)
Flashing (1
Hz)
Ready, not yet configured:
OMB task is ready and not yet
configured.
(green)
Flashing (5
Hz)
Waiting for Communication:
OMB task is configured.
(off)
Off
Not Ready
: OMB task is not ready.
ERR
Name in the
device drawing:
COM1
Number in the
device drawing:
Duo-LED red/green
(off)
Off
No communication error
(red)
Flashing (2
Hz,
25% on
)
System error
(red)
On
Communication error active
LINK/
RJ45
Ch0 & Ch1
Number in the
device drawing:
LED green
(green)
On
The device is linked to the Ethernet.
(off)
Off
The device has no link to the Ethernet.
ACT
/RJ45
Ch0 & Ch1
Number in the
device drawing:
LED yellow
(yellow)
Flickering
(load
dependent)
The device sends/receives Ethernet frames.
(off)
Off
The device does not send/receive Ethernet frames.
Table 37: LED states for the OpenModbusTCP protocol
LED state
Definition
Flashing (1 Hz)
The indicator turns on and off with a frequency of 1 Hz:
“on” for 500 ms, followed by “off” for 500 ms.
Flashing (2 Hz,
25% on
)
The indicator turns on and off with a frequency of 2 Hz:
“on” for 125 ms, followed by “off” for 375 ms.
Flashing (5 Hz)
The indicator turns on and off with a frequency of 5 Hz:
“on” for 100 ms, followed by “off” for 100 ms.
Flickering (load
dependent)
The indicator turns on and off with a frequency of approximately 10 Hz to indicate high Ethernet
activity: on for approximately 50 ms, followed by off for 50 ms. The indicator turns on and off in
irregular intervals to indicate low Ethernet activity.
Table 38: LED state definitions for the OpenModbusTCP protocol
