LEDs
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netTAP NT 50 | Gateway Devices
DOC091202UM09EN | Revision 9 | English | 2013-02 | Released | Public
© Hilscher, 2010-2013
8.2.3
LEDs Open Modbus/TCP
The subsequent table describes the meaning of the LEDs for the Real-Time
Ethernet device when the firmware of the Open Modbus/TCP protocol is
loaded to the device.
LED
Color
State
Meaning
Duo LED red/green
(off)
Off
Not Ready
OMB task is not ready
(green)
Flashing cyclic
with 1Hz
Ready, not configured yet
OMB task is ready and not configured yet
(green)
Flashing cyclic
with 5Hz
Waiting for Communication:
OMB task is configured
RUN
Number
in the
device
drawing
(green)
On
Connected:
OMB task has communication – at least one TCP connection is es-
tablished
Duo LED red/green
(off)
Off
No communication error
(red)
Flashing cyclic
with 2Hz
(On/Off Ratio =
25 %)
System error
ERR
Number
in the
device
drawing:
(red)
On Communication error active
LED green
(green)
On
A connection to the Ethernet exists
LINK/
RJ
Number
in the
device
drawing:
(off)
Off
The device has no connection to the Ethernet
LED yellow
ACT
/RJ
Number
in the
device
drawing:
(yellow)
Flashing
The device sends/receives Ethernet frames
Table 36: LEDs Open Modbus/TCP
