User guide

midon design
1WSwitch User Guide Version 1.02 Page 22 of 28
9. Trouble-Shooting Problems with 1WSwitch
The most common problems associated with using 1WSwitch are listed in the
following table. If these instructions do not result in better results with your
1WSwitch, please feel free to contact Midon Design at
[e-mail]. We would be more than happy to assist you.
Table 5 Common 1WSwitch Problems and Resolutions
Problem Possible Causes
I cannot display 1WSwitch output on
my PC
Ensure that you are connected with the
proper settings (9600 bps, no parity)
and that you are using a straight-
through, not a null-modem, serial cable
I cannot see what I type on Hyperterm This is normal for Hyperterm versions
that come pre-packaged with some
versions of Windows. Upgrade to a
commercial version of Hyperterm or
use different terminal emulator
software.
I added a new sensor and now all I get
is “OW Bus Error” messages
Your sensor is probable reversed on
the 1-Wire bus, OR, there is a short on
the bus. Check your wiring.
I was able to add a new sensor but all I
get is “???” readings from it.
Check your 1-Wire bus wiring. You
may need to add a 100 ohm resistor in
series with a new leg of bus that you
added.
I removed a sensor from my wiring and
now all I get is “???” readings from it.
Delete the sensor (use the DEL
command) to eliminate the ???
readings.
I have a MD2088 LED display and
LED’s 5 to 8 turn on by themselves
and will not turn off
Disable DS2408 input polling via the
EIN OFF command