BusWorks Model XT1533-000
4 CH Current 4 CH Digital I/O w/USB & Profinet
Acromag, Inc. Tel: 248-295-0880
- 34 -
http://www.acromag.com
- 34 -
http://www.acromag.com
Diagnostics Table…
POSSIBLE CAUSE
POSSIBLE FIX
Out
puts Appear Noisy or Unstable…
Have you grounded your I/O
return? One I/O Return
terminal should include a
connection to earth ground.
Connect one I/O Return terminal to earth
ground if the I/O is not otherwise earth
grounded.
Software Status:
“Data Transfer Error”, “Unknown Protocol” or “Timeout Error”…
USB connection was opened
before unit had completed its
power-on initialization and
established its network
connection.
Wait ~30 seconds after powering-up unit
before opening a USB connection via the
configuration software. Turn power off to the
unit, close the USB configuration software,
repower the unit, then reboot the USB
configuration software after the unit has
completed power-on initialization and
established its network connection.
Digital Outputs Not Working…
Missing digital excitation
connection to power which
powers the output driver.
You must connect an excitation supply from 6-
32V to operate the digital outputs (not
required for digital input-only operation).
Digital Inputs Appear to Register Incorrect State…
There is contention between a
field input signal and the
tandem open-source output
which may be ON, or the
Invert Input Logic function is
enabled.
If you are monitoring a field-wired digital input,
you must turn the channel’s corresponding
output OFF. Check the state of the Invert Input
Logic function. Note that the output will turn
OFF if contention with a field input signal
occurs and you will have to cycle excitation
OFF/ON to restore output operation.
Digital
I/O Channels Change States when you connect USB…
Indicative of a ground fault
between earth ground at the
PC and earth ground applied at
an I/O channel, when you have
not isolated your USB signals.
Only connect to the unit via isolated USB if
your I/O signal is already earth grounded. You
could connect without USB isolation if the I/O
signal is not already grounded (not
recommended).
Writing a digital output causes adjacent channels to
change their state…
Digital outputs are written four
channels at a time.
Because all four outputs are addressed at a
time, it is necessary to retrieve or store all
current output states before writing specific
outputs in order to implement a masking
stra
tegy and prevent adjacent channel’s from
potentially changing their states (i.e. if an
adjacent channel is currently ON or OFF, you
need to reinforce the ON/OFF state in your
output write to keep it ON/OFF).
`
