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UM-0085-B8 DT80 Range User’s Manual Page 18
• no user program (or "job") has been loaded
The DT80 is now idle and waiting for instructions.
Connecting to a Host Computer
In order to program the DT80, it is generally necessary to connect it to a "host" computer. The easiest option here is to use
the supplied USB cable, or, for the DT82E/82I, the supplied Ethernet cable. Other options are to use a "null-modem"
(cross-over) RS232 cable, or to connect the logger to an Ethernet network. See Communications (P183) for more details of
the different communications options.
Very briefly, connecting the DT80 via USB involves the following steps:
1. Install the supplied DtUsb driver software. This allows you to access to DT80's network services via a USB
connection.
2. Connect the USB cable between the DT80 and the PC.
3. The Windows "New Hardware Found" wizard will then run automatically (if required) to complete the installation of the
necessary drivers.
4. Your default web browser will then be launched automatically and the dEX home page will be displayed.
To connect to the DT80 using Ethernet:
1. Connect the Ethernet cable between the DT80 and the PC, or between the DT80 and a socket on your computer's
local area network.
2. Use the DT80 keypad to scroll down to the "Ethernet" screen. Check that a valid IP address is displayed, e.g.
169.254.3.202
3. Launch your web browser and type the logger's IP address into the address bar. The dEX home page should be
displayed.
The above is only a brief overview. See USB Port
(P188) for detailed, step by step instructions.
As an alternative to the dEX web-based interface, you can also install the supplied DeTransfer software, which can be used
to send the text-based commands described in this manual to the logger. DeTransfer can operate over a direct RS2323/USB
connection or a network connection, and will work with any logger model.
The remainder of this manual will assume you have successfully established a connection between the host PC and the
DT80.
Sending Commands
The DT80 is programmed by sending it textual commands. These commands may be either:
• manually entered (using DeTransfer, or the Command screen in dEX), or
• generated by the dEX configuration builder, based on details entered using its graphical user interface controls.
Commands are executed by the DT80 only after it receives a carriage-return character (↵).
Commands are not case-sensitive; that is, they may be entered using either uppercase or lowercase characters.
In this manual all commands are shown in UPPERCASE. Responses from the DT80 are shown like this.
After receiving a command, the DT80 will normally echo the command, after converting it to uppercase. Note that the DT80
does not
echo each character as it is received.
After a command has been processed, the DT80 will normally indicate that it is ready for the next one by transmitting a
prompt string, such as:
DT80>
(Command echo and the prompt string can be turned off if required using the /e switch command, see Switches (P261).)
The maximum length of a command is 1023 characters.
The general categories of commands are:
• channel definitions
(P29) (e.g. 2TK("Kiln temp",FF4)) – these define what measurements are to be taken,
how
they are to be acquired and how the measured values are to be presented.
• schedule definitions (P45) (e.g. RA(DATA:2MB)10S) – these define when a set of measurements are to be taken
and where
the results are to be stored
• job management commands (P59) (e.g. BEGIN, END, SHOWPROG) – these allow a set of schedule and channel
definitions to be grouped into a single program, or "job", which can then be treated as a unit.
• data management commands
(P95) (e.g. COPYD, LISTD) – these allow logged data points and alarms to be
retrieved, displayed or deleted.
• configuration commands
(P258) (e.g. PROFILE) – these allow various aspects of the DT80's operation to be
adjusted to suit particular requirements.
Jobs (sets of commands) are stored in the DT80's internal file system along with the data they generate. Different jobs can
be loaded under manual or program control. In addition, the DT80 can automatically run a particular job every time it is reset
or powered up. See Startup Job
(P60).