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Yamato DPI-500 Technical Manual

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DPI-500
OPERATING AND SETUP INSTRUCTIONS
YAMATO CORPORATION
P.O. Box 15070
Colorado Springs, CO 80935-5070
U.S.A.
Phone (719) 591-1500, Fax (719) 591-1045
Technical Manual
YAMATO TECH CORPORATION
#112-19425 Langley By-Pass
Surrey, B.C. V3S 6K1
Canada
Phone (604) 533-2338, Fax (604) 533-0827
1
OM90
4/01

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Summary of Contents for Yamato DPI-500

  • Page 1 DPI-500 Technical Manual OPERATING AND SETUP INSTRUCTIONS YAMATO CORPORATION YAMATO TECH CORPORATION P.O. Box 15070 #112-19425 Langley By-Pass Colorado Springs, CO 80935-5070 Surrey, B.C. V3S 6K1 U.S.A. Canada Phone (719) 591-1500, Fax (719) 591-1045 Phone (604) 533-2338, Fax (604) 533-0827...

  • Page 2: Table Of Contents

    DPI-500 Technical Manual I. Features II. Installation and Wiring III. Configuration IV. Calibration V. Determining Proper Span Gain VI. RS232 Communications Appendix A: System and User Keyword Descriptions Appendix B: Error Codes Appendix C: Specifications Figure 1: CPU Board Layout...

  • Page 3: Features

    Figure 1: CPU Board Layout A crude layout of the DPI-500 circuit board is shown in Figure 1. This layout shows the major compo- nents, as well as the input and output terminal blocks. The inputs and outputs consist of a load cell...

  • Page 4: Configuration

    DPI-500 Technical Manual To Place the Indicator in System Keyword Setup Mode 1) Remove the back cover from the indicator. 2) Place the shunt block across both pins of JP2. 3) Apply power to the indicator. The display will show keyword "F 1"...
  • Page 5 DPI-500 Technical Manual 3) The display will show "A 1" to indicate that the unit is in User Keyword Setup Mode. The front panel keys work exactly as in the System Keyword Setup Mode. See Figure 4 for a map of this setup menu.

  • Page 6: Calibration

    To Set the Zero Point: 1) If the DPI-500 is not in the System Keyword Setup Mode, enter it following the procedure on the top of page 4. 2) Once in this mode, scroll to keyword F16 (please refer to Figure 3 on page 4).
  • Page 7 DPI-500 Technical Manual 4) Make sure that there is no load on the platform and then press the ZERO key to zero the value. 5) Press the NET/GROSS key to save the zero point value into memory. 6) The display will show "EndC0" momentarily, then return to "F 16". Now scroll to keyword F17 to complete the span calibration.

  • Page 8: Determining Proper Span Gain

    DPI-500 Technical Manual Determining Proper Span Gain The span gain parameter, accessed from keyword F2 in the System Keyword Setup Mode, is directly related to the analog to digital integration time. Therefore, the lower the span gain number, the higher the measurements per second. Disregarding the digital filter length, a span gain of 25 produces about 25 to 30 measurements per second, while a span gain of 200 produces only 3 or 4 measurements per second.

  • Page 9: Rs232 Communications

    30000 RS-232 Communications The DPI-500 can communicate with a printer, computer, or remote display via a full duplex, ACSII compatible RS-232 terminal. There are two modes of operation, which can be changed via user keyword A6: Full Duplex Mode and Gross/Net/Tare Print Mode.
  • Page 10 DPI-500 Technical Manual RS-232 Communications (cont.) <STX> <POL> xxxxx.xx <L/K> <G/N> <STAT> <CR> <LF> Gross/Net Carriage Return Weight Data Start G = Gross Transmission N = Net Line Feed Polarity <SP> = positive Units Status "-" = negative L = pound <SP>...
  • Page 11 DPI-500 Technical Manual RS-232 Communications (cont.) 2) Restrictions for transmission: "P" - Will not respond if a) scale is in motion; b) positive overload; c) negative overload; d) negative gross weight; or e) scale is in "Display Check Mode". "Z" - Will not respond if a) scale is in motion; b) scale is not in gross mode; or c) scale is within zero capture range.
  • Page 12 DPI-500 Technical Manual RS-232 Communications (cont.) To Enter a New ID Number 1) While in the User Keyword Setup Mode, scroll to keyword A8. 2) At keyword A8, scroll down once by pressing the ZERO key. 3) The display will momentarily show "ID NO", followed by the current value with one flashing digit.

  • Page 13: Appendix A: System And User Keyword Descriptions

    DPI-500 Technical Manual Appendix A: System and User Keyword Descriptions System Keyword Descriptions: Description Keyword Value Specifies the number of full scale graduations. Value should be consistent with legal 1,000 requirements and environmental limits. Graduations 1,500 2,000 2,500 3,000 4,000...

  • Page 14: Appendix B: Error Codes

    DPI-500 Technical Manual User Keyword Descriptions: Description Keyword Value Select the baud rate for transmission through the serial port. 1200 2400 Baud Rate 4800 9600 Selects number of data bits and parity for serial port transmission. Data Bits and Parity Selects the type of serial mode transmission.

  • Page 15: Appendix C: Specifications

    DPI-500 Technical Manual Appendix C: Specifications Analog Specifications Full Scale Input Signal 30 mV, including dead load Minimum Sensitivity 0.4 V / grad Input Impedance 30 MΩ, typical Internal Resolution 260,000 counts Display Resolution 30,000 dd Measurement Rate 10 Meas / sec, nominal System Linearity Within 0.02% of FS...

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