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© 2009 Active Research Limited
Troubleshooting guide
This guide will concentrate on all relevant troubleshooting issues above simple cable connection faults. Therefore,
the cables between the USG-1 hardware and any other devices should be checked as a matter of course, before
continuing with this guide.
Diagnostic LED
The USG-1 hardware has a bright LED that can be seen through the case to indicate when data is
either
received
or
transmitted. It can be used to debug potential problems. If you have both a talker and a listener connected, then you
can analyse which is working by disconnecting one of them or by stopping the PC from sending data.
Mode / Error condition
Required user response
LED does not flash when the
PC is sending data
Check that the PC program is sending data and that it has opened the comms port
assigned (by user) or allocated (by Windows Device Manager) to the USG-1
LED does not flash when the
Talker is sending data
Check that the ‘Talker’ device is correctly connected to the USG-1-485, that it is
powered on, and that it is sending data.
In addition, the USB driver must be
correctly installed and the PC software must have the assigned comms port
open for the LED to flash
No data is being received
by the Listener, but LED is
flashing as PC is sending
Check that the ‘Listener’ device is correctly connected to the USG-1-485, that it is
powered on, and that it is set to receive data at the Baud rate of the PC comms port.
If there is a cable problem that has activated the short-circuit protection, the
protective poly-fuses will have activated to protect the USG-1-485 from damage. In
this case, remove the cable fault and wait 1 minute before reconnecting the USG-1
to the RS485 network.
If the error persists, the USG-1-485 unit should be returned to
Actisense
(refer to
the
Please contact Actisense before returning
the unit in order to obtain a Returns Number.
Any returns sent without a Returns Number will incur a delay in being
processed. Any returns that are not found to be faulty will incur the minimum
servicing charge.
Table 1 – Diagnostic LED colours
Summary of Contents for USG-1-B-485
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