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QUICK START GUIDE
MODEL DXA/DXI 100/200
DIGITAL ACCELEROMETER &
INCLINOMETER
JEWELL INSTRUMENTS, LLC
Via Paolo Uccello 4 - 20148 Milano
Tel +39 02 48 009 757 Fax +39 02 48 002 070
info@dspmindustria.it www.dspmindustria.it
Jewell Instruments DXA/DXI Quick Start Guide v. 7/2013
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Summary of Contents for Jewell Instrument DXA 100
- Page 1 QUICK START GUIDE MODEL DXA/DXI 100/200 DIGITAL ACCELEROMETER & INCLINOMETER JEWELL INSTRUMENTS, LLC Via Paolo Uccello 4 - 20148 Milano Tel +39 02 48 009 757 Fax +39 02 48 002 070 info@dspmindustria.it www.dspmindustria.it Jewell Instruments DXA/DXI Quick Start Guide v. 7/2013...
- Page 2 DXA-DXI Quick Start Guide Hardware Connections The DXA/I Unit make use of a barrel style connector (MS27476Y10D35P) for interface with the external systems. In order to communicate with your DXA/I Unit please connect the following: Functional Connections Pin Number [+] POWER [-] RETURN D+ / TX+ D- / TX-...
- Page 3 bits) represents the flag and code portions of the status byte. The following is the binary breakout of the status byte: 0b[XX] [XXX] [XXX] LSBs Data FLAG CODE [D1]: This byte consists entirely of data output and it is MSB in relation to the 2 bits in [D0] but is placed in midpoint in the full 18 bit data output.
- Page 4 The data can be read as a 32 bit signed integer, type int or long depending on your architecture. Store the bytes D0, D1, D2 into Reading with D2 occupying the MSB of the data element. Reading &= 0xffffc000; // Mask off the Flag and Code bits //Acceleration is type float or double.
- Page 5 Command Structuring Commands sent to the unit are set by a specific firmware structure which includes a static prefix, unit addressing, the arguments, and a verification checksum. In this subsection we will cover the different elements of the command structure and identify each element’s purpose and manipulation. [PREFIX]: In order to determine the length of a command being received by the DXA / DXI unit the value of a command prefix is predetermined as seen in the following table:...
- Page 6 Default Address Partial Fixed Command Listing In order to quickly begin integrating your DXA/DXI unit in your application the following section will outline commonly used commands with fixed (default) addresses and pre-calculated checksums. Acknowledges are provided for the commands that execute them. A command which address both axes simultaneously will respond with acknowledges independently from each axis.
- Page 7 Upon program launch you are presented with the operational mode selection for your unit. Please select your operating mode, baud rate, the COM port of your RS 485/422 reader and if you are interfacing with a DXA or DXI Unit. The factory default values are RS-422 &...
- Page 8 Of the two commands which take inputs within the DXA / DXI Demo program, the poll continuous command polls does not take the input field as an argument to send to the unit. Instead the poll continuous function uses the input field to control the rate at which the poll command is sent to both axis.
- Page 9 RS-422 RS-485 Operation Operation Temporary Is RS-422 Emulation RS-485 Turned On? Operation While in startup Window 28 mS Start-Up Window Was the BREAK Command Received? Start Up RESET The RS-422 operational mode has been designed to continuously send a stream of data outgoing without interruption for parameter adjustment. Once in this operational mode the Rx Ports on the DSP are disabled even when commands can be fit between output packets.
- Page 10 functionality is built into the DXA / DXI Demo program. However in order to do it manually the following procedure should be observed: 1: Using a terminal emulator program or otherwise controllable data line monitor and control set-up; write a Hexadecimal command string that reads as the following: 0x[AC][UAID][02][Checksum][FF][FF] This command consists of the BREAK concatenated with 2 Rubout and...