Instructions

UM-0085-B09 DT80 Range User Manual Page 187
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Setting and Removing the Command Interface Password
Set a password by sending
PASSWORD="password"
to the DT80 password can be any text string of up to 10 case-sensitive characters.
Remove a password by sending
PASSWORD=""
Note: The password is cleared if the DT80 performs a hardware or HRESET reset.
Accessing Password-Protected Command Interface
To establish communication at any time, simply send the password followed by a carriage return. If the password is
correct, the DT80 responds with Accepted and opens the comms port.
The port stays open until you send the
SIGNOFF command, or while there is comms activity. If there is no
communication for a period of time defined by P14 (default is 600 seconds), the port will time out and close.
Is the Command Interface Protected?
Send the command
PASSWORD
to determine if a command interface password has been set. The DT80 responds with 1 if a password has been set,
otherwise 0.
USB Port
Not applicable to DT82I/ 82E/ 82EM
Configuring the USB Port
USB is much simpler to configure than RS232 because the baud rate, framing and flow control settings are all fixed by
the USB standard. The DT80's USB interface always operates at the standard USB "full speed" rate (12Mbps).
Note that the USB port supports direct connections only. USB modems are not supported.
The only setting that can be specified is the port function. This is set using the
PROFILE command (see Profile Settings
(P264)), e.g.
PROFILE USB_PORT FUNCTION=MODBUS
The possible settings for the USB port FUNCTION parameter are:
•
COMMAND (default) – the port accepts DT80 commands sent directly over the serial interface. The port will
automatically switch to PPP mode if an incoming PPP connection is detected. When the PPP connection is
closed the port will go back to accepting direct commands.
•
PPP – the port accepts PPP connections only.
•
SERIAL – data transmission and reception is controlled by the current job, using the 3SERIAL channel.
•
MODBUS – the port receives and processes incoming serial Modbus requests.
•
MODBUS_MASTER – the port is used for polling a Modbus sensor device, as specified in the current job using
the
3MODBUS channel.
•
DISABLE – the port is disabled. This setting reduces power consumption.
The remainder of this section will assume that the USB port function has been set to COMMAND.
About DtUsb
In order to use the DT80's USB port, it is first necessary to install the dataTaker DtUsb driver software on your computer.
Once DtUsb is installed, it provides two separate "interfaces" to allow application programs to communicate with the
DT80.over USB:
• a TCP/IP interface, which allows full access to all of the DT80's TCP/IP services, including the dEX web
interface
• a secondary "virtual COM port" interface, where the USB port appears as a standard serial COM port. This
allows applications such as DeTransfer to establish a serial connection to the logger over USB in the same way
that they would using RS232 (although note that DeTransfer can also perform most of its functions over a
TCP/IP interface)