Doran 7400 Series Technical Manual
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Doran 7400 Series Technical Manual

Checkweigh indicator
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7400 Series
Checkweigh Indicator
Technical Manual
MAN0198 – Rev 4.8
Doran Scales, Inc.
www.doranscales.com

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Summary of Contents for Doran 7400 Series

  • Page 1 7400 Series Checkweigh Indicator Technical Manual MAN0198 – Rev 4.8 Doran Scales, Inc. www.doranscales.com...

  • Page 2: Table Of Contents

    Table of Contents Introduction ........................... 1 Unpacking Your Scale ........................1 7400 Indicator Specifications ......................2 Scale Annunciators .......................... 3 Power Up ............................4 Basic Weighing Operation ........................ 4 ZERO ..............................4 UNITS (Internal) ..........................4 PRINT (Internal) ..........................4 OVER (Internal) ..........................
  • Page 3 Serial (RS232) Port 1 - 3 SEr1 ......................24 Serial (RS232) Port 2 - 4 SEr2 ......................25 Checkweigh and Output Operation – 9 OPEr ................. 27 Exit - 99 don ..........................28 Data Communications ......................29 Data String Formatting ........................30 Custom Data String Configuration ....................

  • Page 4: Introduction

    Introduction Thank you for purchasing a Doran Scales product. Please read this manual to ensure obtaining all the benefits that the indicator can provide. This manual is intended for revision 4.8 and greater scales. If required, Doran can upgrade the software in your scale to the current revision.

  • Page 5: 7400 Indicator Specifications

    7400 Indicator Specifications NTEP Certificate Class III – 10,000d; Cert. #99-129A4 Enclosure 304 Stainless Steel Product Dimensions 10” W x 6.75” H x 3.5” D Environmental Protection IP69K Legal for Trade 14 F to 104F (-10 C to +40 C) Temperature Range Resolution Range 200d to 50,000d...

  • Page 6: Scale Annunciators

    Fig. 1: Model 7400 Front Panel Layout The operational controls for the Model 7400 by default is the ZERO button. An internal board comes installed to access the UNITS, PRINT, OVER, and UNDER buttons Scale Annunciators ZERO Center of zero. The annunciator will illuminate while the scale is displaying a zero weight.

  • Page 7: Power Up

    Power Up Connect the cord to a compatible power source. For indicators with battery option, press and hold ZERO. Basic Weighing Operation 1) Remove all items from the scale platform 2) Press the ZERO button to zero the scale 3) The weight display now reads zero 4) Place an item on the scale platform and wait for the motion annunciator to turn off, indicating an accurate, stable weight ZERO...

  • Page 8: Three Band Checkweighing

    Three Band Checkweighing Three band checkweighing classifies weighments into over, accept and under. The default configuration is three band checkweighing. Note that lb:oz is not supported for checkweighing limits. Three Band Checkweighing ( 9.1 C.o. set to operation starting with 3 ) 1.

  • Page 9: Five Band Checkweighing

    Five Band Checkweighing Five band checkweighing classifies weighments into high, over, accept, under and low. Note that lb:oz is not supported for checkweighing limits. Five Band Checkweighing ( 9.1 C.o. set to operation starting with S ) 1. Press ZERO 2.

  • Page 10: Weight Reference Entry Of High And Low Limits ( 9.2 C.e. Set To Pb )

    Weight Reference Entry of High and Low Limits ( 9.2 C.E. set to Pb ) 1. Press ZERO 2. Place an item of the desired weight on the scale platform 3. Press and hold the OVER or UNDER until the display reads High or louu respectively 4.

  • Page 11: Installation Guide

    Installation Guide Fig. 2: Motherboard Layout Removing and Replacing the Rear Panel Before you remove the rear panel, remove AC power. Power down the scale if the optional battery power is present. Removing the rear panel requires a 5/16” nut driver. To replace the rear panel and achieve a tight seal, each screw requires a rubber bonded washer and the gasket needs to be in place.

  • Page 12: Load Cell Connection

    Load Cell Connection Load cell connections are made through terminal block TB1. The power cord connects to terminal block TB5 adjacent to the transformer. Fig. 3: Load Cell and Power (lower left of board) 4 wire load cell 6 wire load cell J1 Jumper J2 Jumper Load Cell Input (TB1)

  • Page 13: Power Connection And Fuse

    Power Connection and Fuse Power input is located at terminal block TB5, next to the fuse and black transformer. Neutral Ground Line (Hot) Make sure power is off before replacing the fuse. The scale's fuse (F1) is located next to the power terminal (J1). The scale has a filtered power supply to reduce the effects of normal line noise, but it cannot limit severe fluctuations.
  • Page 14 TB3 RS232 and Remote Switch Connections Description RS232 Port 1 Receive (RXD) RS232 Port 1 Transmit (TXD) Common Ground Remote Switch 1 Input Remote Switch 2 Input RS232 Port 2 Receive (RXD) RS232 Port 2 Transmit (TXD) Remote Switch Common 4.7Vdc RS232 Output RS232 Output...

  • Page 15: Output Connections

    Output Connections Each output point consists of a current-sinking Darlington pair with a transient – suppression diode connected to +V. Jumpers JU7 and JU3 control whether +V is board-supplied 4.7 VDC or 12 VDC. One or the other jumper needs to be installed for output operation, but never both.

  • Page 16: Calibration Guide

    Calibration Guide Note: To calibrate, remove the backplate and use the internal button board, which gives access to the PRINT, UNITS, OVER, and UNDER buttons. Entering Calibration and Parameter Setup Mode The calibration push button is located near the center of the board and labeled CAL. Press this button to enter calibration and setup.

  • Page 17: Calibration

    Calibration After count by has been set, calibration is required 1. Press UNITS until CAL 0 appears on the display 2. Remove all weight from the scale platform 3. Press ZERO and wait for the display to count down to 0 4.

  • Page 18: Scale Calibration Error Troubleshooting

    Scale Calibration Error Troubleshooting The allowable load cell signal input range is 0.30 mV/V to 5.0 mV/V. 1. Calculate scale divisions by dividing the scale capacity by the count by. Example: For a 50 x 0.01 lb scale, divide 50 by 0.01 for a result of 5000d 2.

  • Page 19: Scale Parameter Setup

    Scale Parameter Setup Note: To enter parameter setup, remove the backplate and use the internal button board, which gives access to the PRINT, UNITS, OVER, and UNDER buttons. Entering Calibration and Parameter Setup Mode The calibration push button is located near the center of the board and labeled CAL. Press this button to enter calibration and setup.

  • Page 20: Legal For Trade Restrictions

    Legal for Trade Restrictions When the Legal for Trade mode is enabled, it automatically disables some menus and parameter options. This is done to comply with NTEP and CWM requirements. The menus and parameter sections are shown on the following pages. Menus and parameters not available when in the Legal for Trade mode are marked by an asterisk.

  • Page 21: Capacity And Calibration - 1 Cal

    Capacity and Calibration - 1 CAL Capacity Adjustment CAP Aj 1 lb / kg to 999,000 lb / kg 1 - 999000 Refer to calibration guide for more detail Count By Setup Menu CntBy Also known as resolution or division Selection limited by scale capacity 0.00002 Capacity/resolution (scale divisions) maximum value...
  • Page 22 Automatic Zero Tracking Range A2t * Weight within the specified number of divisions are automatically zeroed Zero tracking is off, no automatic zeroing Zero tracking to within 0.5 division Zero tracking to within 1 division Zero tracking to within 3 divisions Zero tracking to within 5 divisions Zero tracking to within 10 divisions Zero tracking to within 20 divisions...
  • Page 23 Zero on Demand Enables or disable zero latching If ZERO is pressed, it is saved until the scale becomes stable. If the scale is in motion, the zero request is discarded. Print on Demand Enables or disables print latching If PRINT is pressed, the print request is saved until the scale becomes stable.

  • Page 24: General Settings - 2 Cnfg

    General Settings - 2 Cnfg Unit Enable and Disable Determines which unit selections will be active Do not enter Convert selection menu Enter Convert selection menu pounds menu lb is active lb is non active kilograms menu kg is active kg is non active ounces menu oz is active...
  • Page 25 Push Button Enable and Disable P.b. Determines which buttons are active or inactive Do not enter push button selection menu Enter push button selection menu PRINT button pb is active pb is non active UNITS button pb is active pb is non active ZERO button pb is active pb is non active...
  • Page 26 Threshold Level Entry Controls automatic printing features starting with A.P. +0.1% to +9.9% of capacity 0.1 - 9.9 Default setting is 1% Default dEFt Used to set parameters to factory default values Do not default Set parameters to default values Raw counts from the AD converter Counts Used for troubleshooting during calibration...

  • Page 27: Serial (Rs232) Port 1 - 3 Ser1

    Serial (RS232) Port 1 - 3 SEr1 Data Output Mode Port 1 d.o.1 Transmit on demand. Transmit when the PRINT t.o.d. button is pressed. Auto Print 1. Transmit once only when scale A.P.1 becomes stable. Auto Print 2. Transmit once only when scale becomes stable.

  • Page 28: Serial (Rs232) Port 2 - 4 Ser2

    Baud Rate Port 1 br.1 1200 baud 2400 baud 4800 baud 9600 baud 14,400 baud 14.4 19,200 baud 19.2 28,800 baud 28.8 38,400 baud 38.4 Serial (RS232) Port 2 - 4 SEr2 Data Output Mode Port 2 d.o. 2 Transmit on demand. Transmit when the PRINT t.o.d.
  • Page 29 Data Output Format Port 2 For. 2 Basic output format Basic Dual Print Format. Includes Kilogram weight. Basic Output for label printer Model 8000 emulation User definable print string with default values User definable print string with default values User definable print string with default values User definable print string WinSPC compatibility format Baud Rate Port 2...

  • Page 30: Checkweigh And Output Operation - 9 Oper

    Checkweigh and Output Operation – 9 OPEr Checkweigh Operation C.o. Three band checkweighing Checkweigh status continuously active. Three band checkweighing Only active while weight is stable and inactive while the scale is in motion. Three band checkweighing Only active while the weight is above the threshold value (tHs parameter) and inactive when below.

  • Page 31: Exit - 99 Don

    Checkweigh Limit Entry C.E. Scroll from recalled value: Use the OVER or UNDER button to recall a limit. Then use the OVER and UNDER buttons to increase or decrease the recalled target value. Scroll from reference weight: Place an item on the platform and press the OVER or UNDER button to enter that weight as a target value.

  • Page 32: Data Communications

    Data Communications To confirm data has been transmitted, the display will show a "r" in the leftmost Transmit on Demand ( tod ) In this mode, scale data is transmitted whenever PRINT is pressed, a remote switch configured for a PRINT command is pressed, or a print request is received at the serial port.

  • Page 33: Data String Formatting

    Timer 5 ( t5 ) Transmits every 5 seconds. Timer 60 ( t60 ) Transmits every 60 seconds. Data String Formatting Many predefined data formats are available with the 7400. This allows for flexibility when communicating with a database, printer, remote display or other devices. The LB1-4 custom data strings provide the opportunity to define a custom print string up to 64 characters in length.
  • Page 34 Note: “-” represents a space <CR> Carriage Return (0dh) <LF> Line Feed (0Ah) Print String Description Label Printer Output Format <p> Weight Polarity Negative weight “-”, positive weight <FR”L1”><LF><?><LF><p><xxxx.xx><LF space (20h) ><uu><LF><"GS"><LF><MOT><LF><p> <xxxx.xx> Weight Data fixed field <xxxx.xx><LF><kg><LF><P1,1><LF> of 6 digits plus decimal. In overload or underload “-------”.
  • Page 35 Print String Description Custom Data String 1 (\x\w \u \m\r\l) <STX> Start of Text (02h) <p> Weight Polarity <STX><p><xxxx.xx><SP><uu><SP> Negative weight “-”, positive weight <MOT><CR><LF> space (20h) <xxxx.xx> Weight Data fixed field Sample Print String of 6 digits plus decimal. In overload ±--10.05-lb or underload “-------”.
  • Page 36 Print String Description Custom Data String 3 (\xID:\i \w \u \m\r\l) <p> Weight Polarity Negative weight “-”, positive weight <STX><”ID:”> space (20h) <SP><p><xxxx.xx><SP><uu><SP><MO <xxxx.xx> Weight Data fixed field T><CR><LF> of 6 digits plus decimal. In overload or underload “-------”. Leading zeros Sample Print String are spaces (20h) ID:00-±--10.05-lb...

  • Page 37: Custom Data String Configuration

    Custom Data String Configuration Command Length Description Battery Status. Low: “batt” OK: “BATT” Motion aperture (“0.5”, “1”, “2”, “3”, “5”, “10”) Threshold: 2 digits, decimal, and “%” \hxx HEX byte. “xx” can be 00 through FF Linefeed. ASCII 0x0A 0 or 3 Motion status.
  • Page 38 Plain text can be inserted into the data string. No control character or slash is necessary for plain text entry. To download a custom data string, the string must be prefaced by a command to tell the indicator to expect a custom print string. ELx<string>¿...

  • Page 39: Indicator Commands

    Indicator Commands All serial commands require a carriage return (0x0D) as a terminator. Commands can be entered on any communication option or serial port. W, w Weight is transmitted out all enabled ports in the format selected for each port. Wx, wx Custom data string Lb1-4 can be requested to transmit out all ports.
  • Page 40 Port 2 input is echoed to port 2 Scale displays raw counts Clears all ‘x’ commands For a complete protocol, please request this document from Doran Technical Support tech@doranscales.com.

  • Page 41: Troubleshooting

    Troubleshooting If any problem persists, contact Doran Tech Support at tech@doranscales.com Problem What to Do or Check Examine the weighing platform for any interferences. Be Weight reading will not sure that nothing is inside the platform, under the load cell...

  • Page 42: Scale Messages

    Scale Messages Message Meaning "donE" The scale has successfully completed the requested Function complete action. "Abort" The requested action has been canceled prior to Aborted function completion. "SAVEd" The scale has successfully store and verified parameter Parameter value saved value in nonvolatile memory. "rEL Pb"...
  • Page 43 The program memory in the scale has become corrupted. Err 1 Have scale serviced by a qualified scale repair technician. Program ROM error The scale is attempting to load power up zero. This Ldg 0 message will remain until scale is stable. Loading zero.

  • Page 44: Default To Factory Settings

    Default to Factory Settings To return the setup parameters to factory default, follow these steps. When reset to default settings, the CAL menu items and setpoints/outputs are reset. The scale will maintain the calibration settings previously used. A reference for each CAL menu default value can be found the Scale Parameter Menu Setup, listed in bold.
  • Page 45 Doran Scales, Inc. 883 Enterprise Ct. St. Charles, IL 60174 www.doranscales.com...

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