Version: 02/02/05 Page 13 of 22
Serial Interface Port Configuration
•
Connect your computer to the Juice Box via the RS232 interface using a standard serial
cable.
•
Start up the terminal adapter program.
•
Press the Enter key, type “port config”, (case insensitive), then press the Enter key
again.
•
The current settings for all ports will be displayed.
•
Enter the port number to change, press the Enter key, press “M” for modify, then
follow the prompts to change the detection setting and max port power.
•
If the “Enter” key is press for the selection then the current variable is kept unchanged.
•
If you make a mistake you can hit the “Backspace” key then re-enter the character.
•
If the “Enter” key is continually pressed you will exit the Port Configuration routine.
12. Port Status Messages
The system will display different Port Status messages depending on whether or not the system
is delivering power and the status of the load. There are eleven different messages as defined
below.
The following are Port Status messages displayed while the system is delivering power to the
load.
•
Delivering Power – Normal operation, no fault conditions.
•
Over Power Warning – The load is drawing more power than specified by the 802.3af
classification or the Max Port power setting. The system will allow up to 1 watt of
power over the maximum to be drawn before the load is disconnected.
The following are Port Status messages displayed when the system is NOT delivering power to
the load.
•
Detect R High – The system has detected a signature resistance higher than the 802.3af
specification of 26.5K.
•
Detect R Low - The system has detected a signature resistance lower than the 802.3af
specification of 19.0K.
•
Insufficient Power Fault – All available system power has been allocated and there is
none available for this port.
•
Low Current Disconnect – The load is drawing less than the 802.3af specification of
10mA to stay connected. The 10mA minimum load current also applies to Legacy
devices.
•
Open – The system is not detecting any loads on this port.
