BusWorks Model XT1533-000
4 CH Current 4 CH Digital I/O w/USB & Profinet
Acromag, Inc. Tel: 248-295-0880
- 33 -
http://www.acromag.com
- 33 -
http://www.acromag.com
Diagnostics Table
…
POSSIBLE CAUSE
POSSIBLE FIX
USB Communication To This
Unit is Lost…
Was communication interrupted
by severe interference or shock?
Reset the unit by cycling power to it.
Adding another unit to network slows network
interaction considerably…
Does each unit have a unique
MAC address? A
ll units are
shipped with a unique factory
MAC address assignment, but a
rare error in shipment could
release a unit with a default MAC
address of 52:4F:42:45:52:54.
Go to the Network Configuration Page of the
USB Configuration Software and verify each
unit has a unique MAC address--This should
always be the case. If you have 2 units with
the same MAC address, this will slow down
communications considerably and you must
contact the factory for MAC reassignment.
USB Software Fails to Detect Module…
Bad USB Connection
Recheck USB Cable Connection
USB has not enumerated the
device.
Use the reset button of the Acromag USB
isolator to trigger renumeration of the
module, or simply unplug and replug the USB
cable to the module.
Communication or power was
lost while USB was connected
and the configuration software
was running.
Close the current connection with the
software, then select and re-open the
module for communication (or simply exit
the Configuration software and reboot it).
Cannot Communicate with Module via USB…
A missing USB Isolator could
cause a ground loop between a
grounded input signal and earth
ground at the connected
Personal Computer’s USB port.
The USB isolator breaks the ground loop
created between a grounded input signal
source and earth ground of the PC USB port.
For this reason and for increased safety and
noise immunity, it’s best to connect USB via
a USB isolator. Use an isolator like Acromag
USB-ISOLATOR. Otherwise, a battery
powered laptop may configure the module,
as it cannot earth ground its USB port.
Input reading Erratic, Not operational, or Intermittent when Connected to USB…
Unit fails to operate or exhibits an output shift…
Missing USB isolation with
grounded I/O signal source.
Even though the I/O is isolated from the
network and power, if your output signal is
already earth grounded, then connecting
non-isolated USB to the module may drive a
ground loop between your output and earth
ground at the PC. Use USB signal isolation,
or alternatively, you can connect to a
battery-powered laptop/PC, which does not
earth ground its USB connection.
Enabled watchdog timer never times out, or only times out initially…
There is an established client-
server connection (socket) over
the network with this module.
Timer will time out if a client-server network
connection has not been established (i.e.
you are only connected via USB), or has been
severed by a network cable break.
