DC-788 Counting Scale Version 1.
Contents 1.0 Introduction.................................................................................................................................. 1 1.1 Capacities and Resolutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2.1 Description of Modes of Operation . . . . . . . . . . .
6.0 Scale Programming ................................................................................................................... 31 6.1 Checking Memory Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 6.2 Review the Item Code Numbers Programmed in Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 6.
About This Manual This manual contains operating procedures for the DC-788 counting scale and provides the user with all the information necessary for setup and operation. It is organized based on the procedures you will likely follow when setting up and using your counting scale. This manual applies to Version 1.09 of the DC-788 counting scale series. #AUTION Some procedures described in this manual require work inside the scale base.
1.2 Modes of Operation 1.2.1 Description of Modes of Operation The DC-788 has three modes of operation: • Weighing Mode – where all weighing, counting and printing operations take place. • Programming Mode – where item and inventory data can be programmed into the memory of the scale. The display will show ProG to indicate that you are the Programming Mode. • Maintenance Mode where your DIGI dealer can set specifications, perform scale calibration and other maintenance functions. 1.
Indicator Lamp Function or Meaning scale 1 On when scale 1 is in use (the built-in platform) scale 2 On when scale 2 is in use (an external platform) prog On when the scale is in Programming Mode wt/1000 On when the unit weight is being displayed per 1000 pcs. apw On when the unit weight is displayed per one piece (average piece weight).
Key Description CLEAR key. Weighing Mode - Used to clear the Unit Weight. Used to return to the weighing display when doing accumulation. Programming Mode - Used to delete an Item Code or associated value when programming item codes. Used to Cancel input in programming SPC codes. Used to Reset Sequence Number to zero when programming Sequence Codes. PCS key - Used for computing unit weight by sampling. TARE key. Weighing Mode Used to set or clear the tare value.
Key Description KG/LB/INVENT key- Used to convert the weighing units between kg and lb. Also used to toggle on and off whether inventory stored in memory is being affected by the current transaction. UNIT WEIGHT key - Used to set the unit weight and display all digits of the unit weight. Table 1-4.
2.0 Installation This section describes the procedure for the installation and setup of the DC-788 counting scale. 2.1 Unpacking #AUTION Do not turn scale upside down. Always work with scale on its side! Damage to the load cell can occur if the scale is turned upside down. 1. Immediately after unpacking, visually inspect the DC-788 counting scale to ensure all components are included and undamaged. If any were damaged in shipment, notify Rice Lake Weighing Systems and the shipper immediately. 2.
2.2 Repacking If the DC-788 counting scale must be returned for modification, calibration or repair, it must be properly packed with sufficient cushioning materials. Whenever possible, use the original carton when shipping the DC-788. Damage caused by improper packaging is not covered by the warranty. 2.3 Setting Up Place the scale on a solid, level surface away from fans, breezes, and sources of electrical interference.
display’s segments. How thorough the segment check is depends on the setting of SPC 20, Bit 2. The default is 1: Normal (For further instructions on how to set the scale’s specifications, see Section 3.1.2): • If SPC 20, Bit 2 is set to 0: Fast, the scale display’s 888’s for 1.5 seconds, then blanks for 1.5 seconds. It then displays 888’s again followed by a blank display for another 1.5 seconds before going into the normal weighing mode.
6. Attach the red lead to the positive (+) terminal of the new DC battery pack, and the black lead to the negative (-) terminal. Place new DC battery pack in battery compartment. 7. Replace the battery holding bracket and fasten it with its two screws. 8. Replace the battery compartment door and fasten it with its two thumb screws. 9. Put the scale back upright on its feet. 10. Press the ON/OFF key located on the front of the scale. The scale will run through a check of the LCD display’s segments.
2.5 Setting the Date Without a power supply, the DC-788 will reset the time and date. For units that do have battery power, the time and date can be supported for up to 20 days in the OFF status without any AC power supply. After 20 days the unit will reset itself. The procedure below can also be used to adjust the time when moving from Standard to Daylight Savings Time or when the scale is moved to a new facility in a different time zone.
2.7 Block Diagram of Electrical Connections The following block diagram illustrates the electrical connections. 7"% 1PXFS 4FMFDUPS 7 3FHVMBUPS 5SBOTGPSNFS $IBSHF $POUSPMMFS 3FDIBSHBCMF #BUUFSZ 7 PIN .JDSPDPOUSPMMFS ) 4FSJFT -$% .PEVMF 34 $ *OUFSGBDF -PBEDFMM &FQSPN $ 2.8 ,FZQBE " % $POWFSUPS -PBEDFMM Physical Layout of Electrical Connections The following diagram illustrates the actual layout of electrical connections.
3.0 Configuration Settings This section presents the setup and configuration of the DC-788 counting scale to be used specifically by distributors and service technicians. Configuring these specifications allow you to tailor the DC-788 to your specific applications. Setting the specifications allows you to modify the functionality of the DC-788. Use the tables in this section to view the options you can modify. 3.
SPEC No.
SPEC No.
SPEC No. 14 15 Bit 3 Bit 2 Bit 1 Bit 0 Clear Unit Weight When Swap Scale Rezero When Swap Scale Auto Scale Switching Zero Display 0: No (DEFAULT) 1: Yes 0: No (DEFAULT) 1: Yes 0: No (DEFAULT) 1: Yes (SP1_UC) (*V1.06) (SP1_RZ) (*V.106) (SP1_ASS) (*V1.07) 0: Display 0 With ‘/’ 1: Display 0 Without ‘/’ (DEFAULT) (SP1_DIS0) (*V1.
SPEC No.
SPEC No. 26 27 28 29 30 31 Bit 3 Bit 2 Bit 1 Bit 0 Weight Stability Conditions 2nd Scale Please note that the scale switch is not activated until the 2nd scale has been calibrated. IR Mode Protected by Span Switch 00: Loose 01: Normal (DEFAULT) 10: Tight 11: Stringent (SPWTATABC) 0: Inhibit (DEFAULT) 1: Enable 0: No (DEFAULT) 1: Yes (SP_SCALET) (SP_SPSW) Weight Unit Base Type of Decimal Point Negative Weight Display Mask Gross Mode 0: kg 1: lb (DEFAULT) (SPBASE) 0: .
SPEC No. Bit 3 Bit 2 Bit 1 Bit 0 32 Exit From Accumulation Mode After 15 Second Time Out Exit From Acculumation Mode When Weight Change Quantity Accumulation Without Removing Weight Quantity Accumulation Without Changing Weight (for >= ±10e) 0: Allow (DEFAULT) 1: Inhibit (SP_EA15) 0: Allow (DEFAULT) 1: Inhibit (SP_EAWC) 0: Allow (DEFAULT) 1: Inhibit (SP_QARW) 0: Allow (DEFAULT) 1: Inhibit (SP_QACW) 1000: 0.40 ~ 0.46 1001: 0.46 ~ 0.53 1010: 0.53 ~ 0.61 1011: 0.61 ~ 0.71 1100: 0.71 ~ 0.
4.0 Calibration The DC-788 counting scale is a high-precision instrument. Although the scale needs very little maintenance, you may want to check the calibration after every month or so of normal usage. To do this you will need to have a test weight of approximately the total capacity of the scale (i.e. a 10 lb weight if you have a 10 lb capacity scale). After the scale is initially installed, put the weight on the platform and record the weight displayed.
4. The scale display will confirm that you are in the Calibration Mode. 5. You can select which scale you are calibrating, Scale 1 or Scale 2, by pressing the SCALE key. (If a 2nd scale is not installed and set in the specifications, pressing the SCALE key has no effect.) If you have not yet set up the remote scale in the specifications, press the TARE key to exit the calibration process and and set the specifications.
5.0 Scale Operations The following sections contain detailed operator instructions for the DC-530 counting scale (see Figure 5-1). Included are instructions on how to switch between scale platforms, how to enter tare weights, how to enter unit weights, and how to perform counting operations both in the regular Counting Mode and the TEP (Teraoka Error Prediction) Mode. Figure 5-1. DC-788 Counting Scale 5.
5.2 Weight Unit Switching The weight units displayed can be changed between Kg and Lb during weighing operations by pressing the kg/lb key. The appropriate annunicator will light. SPC27 - Base Weight Units sets the default weight unit to Kgs or Lbs. If you are using more than one scale, SPC35 sets the weighing units for the 1st and 2nd scales. (For further instructions on how to set the specifications, see Section 3.1.2) 5.3 Toggling Between Scales To toggle between Scales 1 and 2, press the SCALE key.
2. Place another tare weight on the platform and press the TARE key again. This will add the two tare weights together (Tare Addition). 3. Tare weights can be subtracted individually by removing one from the platform and pressing the TARE key again. To clear all the tare weights and return to the Weighing Mode, remove all the tare weights and press the TARE key. The Net annunicator will no longer be lit. 5.4.
If the sample size is insufficient to give an accurate unit weight, no unit weight will be displayed, the INSUFF lamp will be illuminated and you have the following options: • You can add pieces to the sample (keeping track of how many you add) until the INSUFF lamp goes out Key in the new total sample quantity and press the PCS key. The scale will compute and display the unit weight.
1. At the stand-by screen, press the MODE key twice to enter the Programming Mode. 2. Press and hold the REZERO key while entering [.] [.] [7]. The scale will go to the Sequence Number Reset screen. 3. To save the new sequence number and exit, press the * PRINT key. To exit without saving the new sequence number, press the CLEAR key twice. 5.8 Operations Without Recalling an Item Code The following sections describe ways to carry out operations without having to recall the Item codes. 5.8.
5. Remove container 1 and place container 2 (full of parts) on the scale. 6. Press the + (Plus) key (Total 2 is equal to container 1 plus container 2) The Memory indicator ∑ will be illuminated. 7. Continue with the remainder of the containers to be counted. The total number of parts stored in all the containers will be stored in the accumulation register. 8. To subtract pieces from the accumulation, place the container to be subtracted on the platform and press the - (Minus) key.
5.8.2.4 Counting Out of a Full Container - See Total Amount Remaining in the Container To carry out this operation you must know the tare weight ahead of time. 1. Place the full container on the scale. Press the TARE key. 2. Remove a 10 piece sample to the container and press the PIECES key. After the unit weight has been calculated, return the 10 piece sample to the container. 3. Remove a number of parts from the container.
5.8.3.9 1. 2. 3. Change the Part Name Temporarily In the Weighing Mode, enter a “3” as a command code from the keypad, then press the MODE key. Using the ASCII characters in Table 8-2, enter a Part Name of up to 32 characters to be used temporarily. Store the data by pressing the * PRINT key or press the MODE or TARE keys to return to the Weighing Mode without saving the change. 5.
2. When an Item Code is recalled from memory, the Inventory indicator will start out pointing to OUT, meaning that inventory quantities will be subtracted. To add a quantity to inventory, press the CODE/IN-OUT key once. The Inventory indicator will move from OUT to IN, indicating that inventory will be added. 3. If the tare weight and unit weight have already been associated with the Item Code in memory, you can go to Step 5.
indicators will no longer be illuminated. (Note: If you try to press the CLEAR key while there is data in the accumulation register, you will get an error message which says MEM EXIST. You must press the * PRINT key to clear the accumulation register before the CLEAR key can be used to clear any unit weight data on the display.) 5.9.4 Tare Override This function allows you to temporarily override the tare weight called up with an Item Code.
6.0 Scale Programming The DC-788 can store information for the parts you count most frequently, eliminating the need for re-entering data during parts counting. With each Item Code you can specify a Tare Weight, Unit Weight, Part Number, Part Name, Lot Number, Inventory Quantity and Setpoint Value. With up to 100 item code numbers able to be programmed into your DC-788 counting scale, the unit can act as a stand-alone inventory system.
6.2 Review the Item Code Numbers Programmed in Memory To see what Item Codes are currently programmed in the DC-788’s memory, press the MODE key twice to enter the Programming Mode. Then press the CODE/IN-OUT key to show the first Item Code number in memory. The left-hand side of the display will show the memory position starting with 001, while the right-hand side of the display will show the Item Code number you programmed in.
display will show the field that the data is being entered for. Once the display of this character clears, the scale is ready to accept your next ASCII code. NOTE: If you enter an Item Code that has already been stored in memory, the scale will ask you if you want to clear the stored data associated with that Item Code. You can press the CLEAR key to erase the existing data and reprogram that Item Code, or press the MODE key to return to the Programming screen and enter a new Item Code. 3. 4. 5. 6. 7. 8.
02: SET POINT ALARM must be set to “0: ON”. See Section 3.1.1 for instructions on how to set Customer specifications.). % QTY QTY % WEIGHT WT Program Set Point 1 value with . . . target quantity low value target weight low value Program Set Point 2 value with . . . % of quantity target value % of weight target value Table 6-3. Setpoint Configuration Here are some examples of how the setpoints can be programmed. These examples can be adjusted to fit your application.
•There are four types of setpoints which can be selected by setting SPC 04, Bits 1 and 0: % of Quantity (%QTY), % of Weight (%WT), Over/Under Quantity (QTY), or Over/Under Weight (WT). • When entering weight setpoints, be sure that you enter in the weight values with decimal point and all leading and trailing zeros. • All percentage values must be rounded to the nearest whole number, fractional percentages are not allowed.
6.7.1 Change the Lot Number Temporarily 1. In the Weighing Mode, enter a “1” as a command code from the keypad, then press the MODE key. 2. Using the ASCII characters in Table 8-2, enter a Lot Number of up to 32 characters to be used temporarily. 3. Store the data by pressing the * PRINT key or press the MODE or TARE keys to return to the Weighing Mode without saving the change. 6.7.2 Change the Part Number Temporarily 1.
If you have entered an existing Item Code, the display will ask you to confirm that you want to delete. Press the CLEAR key to delete this Item Code and all of its data, or press the MODE key to cancel the deletion. If you pressed the CLEAR key, the Item Code will be deleted and the scale will return to the Programming Mode screen. 4. To return to the Weighing Mode, press the MODE key once. 6.8.
delete. 4. Press the CLEAR key to delete all unit weights in memory, or press the MODE key to cancel the deletion. If you pressed the CLEAR key, the unit weights will be deleted and the scale will return to the Programming Mode screen. 5. To return to the Weighing Mode, press the MODE key once. 6.8.5 Delete All Tare Weight Values From Memory To clear all the tare weights associated with Item Codes in memory, perform the following steps. 1. Press MODE key twice to enter the Programming Mode.
delete. 4. Press the CLEAR key to delete all part numbers in memory, or press the MODE key to cancel the deletion. If you pressed the CLEAR key, the part numbers will be deleted and the scale will return to the Programming Mode screen. 5. To return to the Weighing Mode, press the MODE key once. 6.8.7 Delete All Setpoint Data in Memory To clear all the setpoint data associated with Item Codes in memory, perform the following steps. 1. Press MODE key twice to enter the Programming Mode.
delete. 4. Press the CLEAR key to delete all part names in memory, or press the MODE key to cancel the deletion. If you pressed the CLEAR key, the part names will be deleted and the scale will return to the Programming Mode screen. 5. To return to the Weighing Mode, press the MODE key once.
7.0 External Devices: Printers, PCs and Scales The DC-788 Counting Scale is equipped with an RS-232C port that allows the scale to communicate with either an external printer or a PC. SPC 05, Bit 3 and Bit 2-Function of RS-232C Interface must be set to 00: PC or 01: Printer for communication to take place (For instructions on how to program Customer specifications, see Section 3.1.1.). It also comes standard with a remote scale channel that enables you to add a second channel (See Section 7.
7.1.3 Epson TM-U210 and TM-U290, Star SP2320 and SP298 Printer Side 9 PIN D-SUB (socket) 7.2 DC-788 Side 9 PIN D-SUB (plug) PIN SIGNAL PIN SIGNAL 2 TXD RXD 2 3 RXD TXD 3 7 GND GND 5 4 RTS RTS 7 5 CTS CTS 8 Printer Label Formats SPC09 - External Printer Type sets the type of printer that is connected to the scale. This determines the format and content of the data that is transmitted to the printer. You have the following options: 7.2.
Zebra LP2844 Default Total Label While Recalling an Item Code Prints when recalling an Item Code from memory and accumulating, then printing by pressing the * PRINT key. Figure 7-2. Zebra Default Total Label Sample Zebra LP2844 Default Label When Not Recalling an Item Code Prints when accumulating without recalling an Item Code from memory, then pressing the + (Plus) or - (Minus) key. Figure 7-3.
7.2.4 Epson TMU200 or Star SP2320 Tape Printer Set SPC09 to 0011. These two tape printers use a default format which is downloaded to the printer when powering up. The default format looks like the following: Figure 7-4. Epson TMU200 or Star SP2320 Tape Printer Sample Default Label Format 7.2.5 Epson TM-U295 or Star SP298 Ticket Printers Set SPC09 to 0100. These two ticket printers use the same default format as the Epson and Star tape printers in Section 7.2.4.
7.3 Connecting to a PC 7.3.1 Setting the Scale Specifications for Communication to a PC The DC-788’s RS-232C port can be used to connect the scale to a PC and output the data string to the computer. The following specifications must be set for the data transfer to take place: (for more information on setting specifications, see Figure 3.1.1) • SPC05, Bits 3 and 2-Function of RS-232C Interface, must be set to 00: PC.
7.3.2.7 Standard Manual Data Transmission Set SPC08-RS232C PC Protocol to 0010: Standard Manual Type. The communication between the DC-788 and the computer flows as follows: Figure 7-8.
7.3.2.9 Standard Command Data Transmission Set SPC08-RS232C PC Protocol to 0011: Standard Command Type. The communication between the DC-788 and the computer flows as follows: Figure 7-10.
7.3.3 Pin Assignments The DC-788 counting scale is connected to a PC using a 9 pin D-SUB connectors configured as follows: Inside the DC-788 DC-788 Plug Side CN6 (5 pins) CN6 (5 pins) 1 RXD 2 RXD 2 RTS 7 RTS 3 TXD 3 TXD 4 CTS 8 CTS 5 GND 5 GND PC Side TXD RXD GND If handshaking is not required for your RS-232 communication with the computer, the RTS and CTS do not need to be connected in the cable and SPC06, Bit 3 - RTS/CTS Handshaking of RS-232C can be set to 1: Off. 7.3.
Command ENQ Enquiry 05H ACK Acknowledge 06H NAK Unacknowledge 15H Table 7-2. RS-232C Codes, Headers, Fields and Commands 7.3.5 RS-232C Data Transmission Formats The basic data transmission string format output by the DC-788 is as follows (with a more detailed discussion of each element below): Status Flag Weight Condition Flag CR Header Code ID Code CR .....
Data about an ID Code is only transmitted if an ID Code has been recalled from the scale’s memory.
By ASCII Code: 0x42 0x32 0x42 0x30 0x0d 0x30 0x30 0x33 0x2e 0x34 0x35 0x36 0x0d 0x34 0x30 0x31 0x2e 0x32 0x30 0x30 0x0d 0x31 0x31 0x2e 0x35 0x30 0x30 0x30 0x0d 0x30 0x30 0x32 0x33 0x30 0x34 0x0d 0x0a Example 2: If the same parameters are true as above but with a weight overflow The data transmission will be as follows: 0x42 0x32 7.
Pin # Function Polarty Color 1 Sense (+) Orange 2 Sense (-) Blue 3 Excitation (+) Red 4 Excitation (-) White 5 Shield 6 Signal (+) Green 7 Signal (-) Yellow 8 Ground Black Table 7-3. Remote Scale Channel Pin Configuration 7.4.1 Setting the Specifications for Scale 2 A scale connected to the Remote Scale Channel will be recognized by the DC-788 as Scale 2. The specifications that need to be set to configure the communication with the second scale are as follows: • SPC 26.
7.4.2 Remote Platforms Available Platform Capacity Platform Dimensions 100.00 lbs 13" x 17" (DIGI S-SL Platform) 250.00 lbs 17" x 21" (DIGI S-TL Platform) 500.00 lbs 17" x 21" (DIGI S-TL Platform) 1500.0 lbs 24" x 28" (DIGI S-UL Platform) 2500.0 lbs 36" x 36” or 48" x 48" (DIGI Summit 3000 Platform) 5000.0 lbs 48" x 48" (DIGI Summit 3000 Platform) 10000.0 lbs 48" x 48" or 60" x 60" (DIGI Summit 3000 Platform) 25000.0 lbs 42" x 72" or 60" x 84" (DIGI Summit 3000 Platform) 50000.
8.0 Appendix 8.1 DC-788 Specifications Operating Conditions • Power Source • Operating Temperature• Operating Humidity • Power Consumption - AC117/100V -10°C ~ +40°C (OIML) 15 ~ 85% RH 18W when using AC power 1W when using rechargeable battery Charging Conditions (for rechargeable battery only) • Power Source AC117/100V • Charge Current 800 mA • Charge Time 8-10 hours Analog Specification • Input Sensitivity 1mV/V • Zero Adjust Range 0 ± 5mV • Zero Balance Range 0 ± 0.
Error Message Possible Causes Corrective Action 888888 Happens when the scale is not stable when the power is on. If a second scale is enabling, it must also be stable. If the second scale has not been calibrated, this will not apply. Place the scale on a firm, flat surface. You can press [C] to ignore the second scale if it is not stable. Total FULL When the current total overflows the register Clear the current total. APW When the unit weight is insufficient to display.
Code Char Code Char Code Char Code Char Code Char Code Char Code Char 54 6 86 V 118 v 150 – 182 ¶ 214 Ö 246 ö 55 7 87 W 119 w 151 — 183 · 215 × 247 ÷ 56 8 88 X 120 x 152 ˜ 184 ¸ 216 Ø 248 ø 57 9 89 Y 121 y 153 ™ 185 ¹ 217 Ù 249 ù 58 : 90 Z 122 z 154 š 186 º 218 Ú 250 ú 59 ; 91 [ 123 { 155 › 187 » 219 Û 251 û 60 < 92 \ 124 | 156 œ 188 ¼ 220 Ü 252 ü 61 = 93 ] 125 } 189 ½ 221 Ý 253 ý 62
9.0 DC-788 Limited Warranty Rice Lake Weighing Systems (RLWS) warrants that all RLWS equipment and systems properly installed by a Distributor or Original Equipment Manufacturer (OEM) will operate per written specifications as confirmed by the Distributor/OEM and accepted by RLWS. All systems and components are warranted against defects in materials and workmanship for one year. RLWS warrants that the equipment sold hereunder will conform to the current written specifications authorized by RLWS.
