Rockwell Automation 1770-KF3 DH-485 Communication Interface User Manual - Manual (Page 44)

Chapter
5
5Ć1
Troubleshooting the KF3
There are four LEDs on the front panel of the KF3. These indicators
can help you in diagnosing problems with the module’s installation and
operation.
Table 5.A
LED Indicators
LED Indicator Description
Power This indicator is lit (green) when the module is plugged in and turned on.
Fault This indicator goes on solid red if a hardware fault is detected on power
up, or during operation. If this occurs, the type of fault is displayed on the
left numeric display on the bottom of the module. Refer to the section on
Interpreting the Numeric Displays" on page 5Ć2 for information on fault
codes.
This indicator will flash red at 1Ćsecond intervals when a station with
the same address as this node is detected. To correct the fault, go into
configuration mode and change the address of one of the stations to an
unused one.
RSĆ232C Activity This indicator flickers green when data is received by the module from
the host computer. The more activity on the RSĆ232C link, the faster this
indicator will flash. At times of high activity, the indicator may flash so
rapidly that it appears to be solid green.
DHĆ485 Activity Shows activity on the DHĆ485 network. It turns on (green) while the KF3
has the token, and turns off when another station on the network has
the token. It will flash slower as more stations are added to the network,
since this node will have the token less frequently. It will also slow down
if other nodes on the network are transmitting large data packets.
Interpreting the Front Panel
LEDs