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CellScale

®

 System   •   3750CS-5 User Guide    Page 61   

MEASUREMENT  SYSTEMS  INTERNATIONAL

Software V2-21 or greater, 2nd Generation Modem

SECTION 9 – COMMUNICATION PORTS

INTRODUCTION

•  The MSI 3750CS is equipped with a single RS-232 serial input/output and a Real Time Clock/Calendar. The 

Comm Port is intended for interfacing printers, data loggers, scoreboards, and computers to the 3750CS Meter. 

The real-time clock allows the user to time and/or date stamp any data obtained from the 3750CS. 

•  The data output is fully format able. The 3750CS, under menu control will print control characters for easy 

interfacing to any label printer. An initialize string combined with start string, product labels, user program-

mable data, weight data, and end strings, provides complete control over printed data.

•  Many scales and weigh meters suspend weighing operation while printing and will not function until a print 

job is completed. The MSI 3750CS RS-232 output uses advanced DMA (direct memory access) techniques 

for transmitting the print strings. This prevents long print jobs from interfering with scale operation. 

Comm Port Function
The RS-232 output is used in conjunction with the PRINT key to output weight and total data to a printer or can 

be used for bi-directional communications with a computer, allowing full computer control of scale functions. In 

addition there are several automatic print modes including print on Total, when there is a weight change, or when 

a set point is reached. Interval and  continuous printing is available for data logging or interfacing Scoreboard 

displays.
Comm Port 2 is dedicated to RF Communications and not accessible for user programming. However, Modem 

parameters and diagnostic menus are available.

ELECTRICAL CONFORMANCE

The electrical characteristics of the serial input/output conform to the EIA Standard EIA-232-D (downward compat-

ible with RS-232C). Comm Port 1 is configured as DCE. Cable connections include RXD (input), TXD (output), 

Ground, CTS (input), RTS (output), and Shield Ground (also known as Frame Ground). CTS/RTS handshaking 

is optional and the lines do not need to be connected

COMM PORT CABLING

3750CS units have a water-proof connector on the rear panel. This connector mates with MSI P/N 12023 which 

provide unterminated wires, or MSI P/N 501705-0001 which provides a standard 9 pin “D” connector termina-

tion.
Unterminated wire assignments are: Brown – TXD (output), Black – RXD (input), White – CTS (input), Grey 

– RTS (output), and Blue is Signal Ground.

DATA CONFIGURATION

The 3750CS serial port options are configured with the “COMPORT” Menus. Standard data configuration is:
Data String Buffers
A Data String is simply a collection of characters stored in memory, that are used to format the Comm Port output. 

Data Strings are defined by the user. The length of the formatting strings are limited to 255 characters.. However, 

since 3 or 4 character commands can cause an output of up to 99 characters in length, the 255 limit does not 

represent the maximum size of the data output. The 3750CS offers the programmer the ability to print any and all 

weight data, time and date stamp, and formatting controls suitable for even the most complex bar code printer.
Data Format
Each transmitted reading consists of a number of programmable character strings. Data is completely user pro-

grammable and can include formatting characters and text in addition to all weight parameters. The End-of-Line 

string is used for Carriage Return or other end-of-line control characters. These are easily entered through the 

Comm Port menu or downloaded through a computer.

OUTPUT CONTROL

The MSI 3750CS serial port functions in any of 10 modes: 

1)  Front Panel Print Key:

  This is a print on command mode which works when the print button on the front panel is pushed. The Print 

key is active in all modes unless disabled by computer control or the Lock Function. The “MOTN DET” menu 

Summary of Contents for 3750CS-5

Page 1: ...MSI3750CS 5 RF Digital Weight Indicator a component of the CellScale System Measurement Systems International User Guide NOW NTEP APPROVED COC 05 077 ...

Page 2: ...up ID Codes 33 ID Code String 1 String 2 34 SECTION 6 TOTAL STATISTICS 35 Total 35 Auto Total 35 Total Menu Setup Total 36 View Total 38 Clear All Totals 39 Alternate Clear Total Methods 39 Statistics 39 SECTION 7 3750CS METER SETUP 41 Main Setup Menu 41 Real Time Clock Calendar 43 Setup Power Menu 44 Bar Graph Menu 45 Lock 46 SECTION 8 SET POINTS 49 Introduction 49 Set Point Setup Menu 50 Example...

Page 3: ... 3750CS can read the output of many CellScales and 1 CellScale can also provide data to many 3750CS The large backlit alphanumeric display provides precise unambiguous indication of operating modes such as Net Gross or Total The 3750CS can calibrate a CellScale remotely and provides a simple user interface to the advanced features of the CellScale Digital calibration makes maintaining the system a...

Page 4: ...ception Analog bar graph provided for relative to full scale weight indication Also used for RF level indication Display illumination uses rugged long life LED backlighting coupled with a transflective LCD to provide optimum display contrast under all ambient conditions from full sunlight to total darkness Operation is light sensing automatic or manually set Versatile power input options AC Only 90...

Page 5: ...ect this directly to the battery negative terminal or where the negative terminal is attached to the chassis Brown Connect to Battery Positive Again a direct battery connection is usually best to avoid interference with vehicle electrical systems The 3750CS is internally fused If connected to a breaker or fuse panel use 1A at 12V 5A at 24V Fast blow or medium blow fuses are acceptable White Black ...

Page 6: ...8 9 NC Brown TD Black RD Blue GND Grey CTS White RTS Jumper 1 6 4 RS 232 DTE 9 Pin Male D Solder Cup View Wiring for direct 3750CS to Printer Scoreboard connection 1 2 3 4 5 6 7 8 NC 9 Brown TD Black RD Blue GND Grey CTS White RTS Jumper 1 6 4 RS 232 DCE 9 Pin Female D Solder Cup View Standard wiring for direct 3750CS to Computer connection ...

Page 7: ...ss A digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications ...

Page 8: ...n and other obstructions It is not necessary or desirable to provide a ground plane for the antenna 3 Never use a directional antenna e g a Yagi or a corner reflector on a mobile system However fixed station locations can often benefit from directional antennas when the location of the other components of the RF network are always in the same general direction 4 If using the meter mounted standard an...

Page 9: ...T The Long Range Omnidirectional antenna MSI P N 12147 is pole mounted up to 2 diameter and extends the range of CellScale transmissions MSI supplies this antenna with a 10 3m coax cable pre attached This antenna must be vertically mounted The vertical Beamwidth 3dB point is 14 degrees Also available with an N connector MSI P N 12037 for applications requiring longer coax cable lengths ...

Page 10: ...both high gain and controllable transmission patterns These anten nas are the best choice when antenna placement is against a wall or other surface These antennas come with a Pipe mount for pipe up to two inches 5cm in diameter The 14dBi Model MSI P N 13204 13209 Coax features a Beamwidth of 44 Elevation and 35 Azimuth The 9dBi Model MSI P N 13205 13209 Coax has a Beamwidth of 75 Elevation and 65 ...

Page 11: ...rts a selec tion of hopping patterns that avoid the various 802 11b direct sequence channels These limited band hopping patterns allow CellScale networks to be used with 802 11b networks without impacting the performance of the 802 11b networks Settings for 802 11b avoidance are found in the Comm Port 2 modem menus See page 34 for details FCC S MPE REQUIREMENTS Information to user installer regard...

Page 12: ...t often Ranges from 0 to 63 C S ID Sets the primary master CellScale ID number This number must match the Source Address number of the primary master CellScale Ranges from 0 to 254 MY ID Each remote unit in a given Network must have a unique ID number Enter up to three digits to designate the 3750CS ID number Ranges from 0 to 254 TIMEOUT Sets the time in seconds 0 1800 that the 3750CS will wait fo...

Page 13: ...k is not on or in range 6 Push the UP key to the C S ID menu 7 Use the numeric keys to change the C S ID number to match the SRC address programmed in the CellScale master Available C S ID numbers range from 0 254 In this example we ll use source 75 Use the appropriate numbers for your CellScale master It is not necessary to enter leading zeros 8 Push the ENTER key to set the C S ID 9 Push the UP ...

Page 14: ... NET key usually F2 The display enters the Setup RF NETWORK mode 3 Push ENTER The first menu item is NET 1 The numeric digits indicate the current network CS ID pair 4 Change the Network number by pushing the numeric keys Available network numbers range from 0 63 In this example we ll use network 02 Use the appropriate numbers for your CellScale master You must enter a leading 0 for networks below ...

Page 15: ...M key usually F1 will send a Talk to me message to the master CellScale If this fails to initiate conversation recheck your C S ID numbers and make sure they match Also if there are additional 3750CS units set to the same network they must have different Remote IDs see MY ID Another common cause of perceived problems is the Phantom Network This occurs when there is a conflict ing Network within bro...

Page 16: ...of the antenna should be perpendicular to the earth not parallel It is OK to mount the Antenna upside down This is a good solution when an antenna is mounted on the ceiling for communication with CellScale components in the building FIRMWARE VERSION NOTICE This User Guide is intended for CellScale equipment that uses MSI s next generation of RF Modems This guide applies only to 3750CS Indicators m...

Page 17: ...ddition the CellScale provides channel 5 for remote CellScales and channel 6 for math channels which allow the user to add or subtract channels from each other or perform other math manipulations of the data All calibration data for the 32 channels is stored in the CellScale and is independent of the 3750CS Therefore any 3750CS can receive calibrated data from any CellScale provided the RF network...

Page 18: ...NNELS As mentioned above the 3750CS will access any channels setup in the CellScale It does this with the SC INDEX function The SC INDEX steps from channel to channel as dictated by the Scan list stored in the CellScale If the CellScale has only one scale channel defined this procedure is not necessary This is always the case for MSI 6260CS Crane Scales and other single load cell systems For system...

Page 19: ...turn to normal scale opera tion TARE Tare is typically used to zero out a known weight such as a packing container or pallet and display the load in NET weight A Tare value is entered in one of three ways 1 AUTO TARE When the TARE key is pushed twice the current weight is zeroed and Net Weight is dis played 2 KEYBOARD TARE Using the numeric keys the operator keys in the desired Tare Weight then pu...

Page 20: ...art step 2 2 Using the numeric keys input the value desired In this example we ll use 0 5 lb as a Tare Value The 3750CS will automatically place a leading zero if the Tare value starts with the decimal point 3 The Tare Value 0 5 is displayed 4 Push ENTER to place the value in the Tare Register The display reads TARE SET and displays the Tare value for 1 second All subsequent readings have the Tare...

Page 21: ...E the automatic TARE Clear function AUTO CLR and the TAREALL function UNIV TAR TAREMODE 1 AUTO Only Auto Tare is in operation Every time the TARE key is pushed the current weight on the scale is tared 2 KBD UPDN In this mode pushing the TARE key will enable the numeric keypad for Keyboard Tare and the UP DOWN scroll keys for TARE UP DOWN Also in this mode pushing the TARE button a second time will...

Page 22: ... mode to KBD UPDN 5 Push ENTER The Scale returns to the SETUPTARE menu 6 Push EXIT to return to normal operation with the TARE key function altered 1 2 TAREMODE 3 TAREALL 3 AUTO CLR 4 DISABLED 5 ENABLED 6 AUTO CLR 7 1 Push SETUP 2 Push TARE The TAREMODE submenu is shown 3 Push the UP scroll key to change the submenu to AUTO CLR 4 Push ENTER The first selection is the currentAUTO CLR mode 5 Push the...

Page 23: ...only way to return to permanent Gross readings is to clear the Tare see Clear Tare procedure 1 2 TAREMODE 3 TAREALL 4 DISABLED 5 ENABLED 6 TAREALL 7 1 Push SETUP 2 Push theTARE switch The first menu choice TARE MODE appears 3 Push the UP scroll key to change the menu to TAR EALL 4 Push ENTER The first selection is the current TAR EALL mode 5 Push the UP key to change TAREALL to ENABLED 6 Push ENTER ...

Page 24: ...am a FUNCTION key for PEAKHOLD See Section 4 2 Turn on the Peak Hold mode by pushing the selected FUNCTION key The display reads PEAK NET or PK GROSS to indicate peak hold mode is enabled The display will only update when a greater value than previously recorded is detected KILOGRAM SHORTTON 1 2 UNITS 3 4 5 KILOGRAM Scroll Through Available units 5 GRAMS 6 Push UNITS Usually F5 The displayed weigh...

Page 25: ...ssage is displayed 1 Push the SETUP key 2 Push the 9 key a All segments turn on for 1 second the off for 1 2 second b All digits 7 segment and 16 segment count once from 0 to 9 All annunciators are tested including lb kg t and the Total LED c Battery condition is displayed next in the form of Battery life with a figure from 1 to 100 on the digits The battery life will vary depending on whether the ...

Page 26: ...abels Function Keys are setable to any of the following functions Grand Total Display totaled weight of all ID Codes 1KeyClrTotal Clears current IDs Total 2KeyClrTotal Clears current IDs Total requires confirmation key Clr Last Total Clears only last weighment Grand Total Displays grand total of all IDs ID Number Push to change the ID code SC Index Switch between selected scale channels Modem Config...

Page 27: ...play the SETUP Screen 2 Push SETUP again The first setup menu item is KEY FCTN In this example we ll change the function of the UNITS key F5 to SET POINT 3 Push ENTER You are now in the KEY FUNCTION Menu The LCD reads ASSGN F1 4 Push the DOWN Scroll key to change to ASSGN F5 5 Push ENTER The current Function Key selection is shown 6 Use the UP DOWN keys to scroll through all the functions that F5 k...

Page 28: ...ated when a new name is entered by the user The name can be all numbers all letters or a combination of numerals and letters Once the name is entered by the user the CellScale scans its memory to see if the ID Code already exists If it does all new totaled weighments are added to the previously totaled weighments and any preexisting Tare value will be used for NET weight computation If the name di...

Page 29: ...he Alpha numeric keys They provide a convenient way to change for example a 1 to a 2 Left and Right Cursor Keys Use to position the cursor under characters to be edited Used to insert characters within a string Position the cursor over the character you wish to insert in front of then push the NET GROSS key The highlight character will appear on the current position Pressing the DOWN Scroll key wi...

Page 30: ...de USING ID CODES To Create a New ID Code Numeric example 1 2 3 S 3 T 4 TD TE 5 TES 6 TES_ 7 TESS 7 TEST TEST_ 1 Push ID The current ID is displayed 2 Push the Aa1 ALPHA key to enable the Alphanu meric keys The right most numeric digit displays a U indicating Upper Case In this example the ID Code will be TEST 1a 3 Enter in the word TEST As the S and T are on the same key this is a good illustrati...

Page 31: ...example The process of accessing an existing ID Code is identical to the process of creating a new ID Code When the 3750CS detects an ID Code entry it always checks to see if the Code already exists 1 2 5_ 56_ 567_ 4 4 5 1 Push ID The current ID is displayed This example uses F1 can be changed with the Function Key setup procedure 2 Push the first digit of the new ID Code In this example we are sea...

Page 32: ...e The 3750CS returns to normal scale operation with the new ID Code AARDVARK for example active Any Tare value and new totals will be stored in the ID Code AARDVARK 1 Push ID The current ID is displayed 2 Push the CLR key The message CLR 1 ID appears 3 Push ENTER to delete the ID Code The previous ID Code is deleted and the next ID Code alphabetically will become active Push EXIT instead of ENTER ...

Page 33: ...UP 2 Push the ID key whatever Fkey ID is assigned to The message display reads ID NUMBR 3 Press ENTER The display reads ID NAME 4 Push ENTER to go to the edit screen 5 The message display will show the far left character blinking Use the LEFT RIGHT Cursor keys to select the character you wish to edit Use the UP DOWN keys or use the standard Alpha Numeric entry procedure to change the letter s When...

Page 34: ... procedure To Access an Existing ID Code page 41 1 2 ID NUMBR 3 ID NAME 4 NUM DISP 4 STRING 1 5 6 to select char 6 to scroll char 6 to input char 7 to finalize edit 1 Push SETUP 2 Push the ID key The message reads ID NUMBR 3 Push ENTER to access the menus 4 Use the UP key to find the desired ID Code String STRING 1 or STRING 2 5 Push ENTER The current string if any will be displayed 6 The message di...

Page 35: ...se of the PRINT button or with a computer hookup AUTO TOTAL SETUP Option see SETUP TOTAL to enable Auto Total When the weight exceeds the Total Threshold the total function operates automatically There are 5 modes of Auto Total Each mode is used in slightly different ways Mode 1 Autonorm The displayed weight is held in a holding register and added when the weight returns below the Total Threshold ...

Page 36: ... To Clear the Total Value to learn how to erase the Total Rules for Auto Total 1 Cannot be in motion An auto total acceptable reading is indicated by three or more short flashes of the Total LED 2 Weight readings must be greater than the set Total Threshold 3 Each reading added to total must be preceded by a return to zero Net or Gross or below the Total Thresh old TOTAL MENU SETUP TOTAL Allows Fro...

Page 37: ...should be pushed after the LCD indicates AUTONORM 6 Push the EXIT key to return to normal scale opera tion Auto Total is now enabled The small AUTO annunciator will appear Turn on Auto Totaling by pushing the TOTAL key The display will read TOTAL ON and the small AUTO annunciator will appear Turn off Auto Totaling by pushing the TOTAL key The display will read TOTALOFF and the small AUTO annunciat...

Page 38: ...ce MOTION 4 Push ENTER The message display shows ENABLED or DISABLED 5 Toggle the motion condition with the UP or DOWN key ENABLED means totals will not function until the weight has settled DIS ABLED indicates that motion conditions are ignored 6 Set the new Total Motion condition by pushing ENTER 7 Push the EXIT key to return to normal scale opera tion To Erase the last Totaled Weight If the las...

Page 39: ...Please make sure all data is recorded as necessary before proceeding To Clear All the Totals of all ID Codes at once ALTERNATE CLEAR TOTAL METHODS The 3750CS offers two alternative methods for clearing the totals These are set up using the Function keys see section 4 1KEYCLR will clear the current IDs Total without further confirmation The 2KEYCLR mode requires confirmation by asking R U SURE Then t...

Page 40: ...the average value the mean The 3750CS uses the non biased or n 1 method that is based on sampling a portion of each available weighment Standard Deviation uses the following formula where x is equal to the total and n is equal to the number of samples COEFFICIENT OF VARIANCE is a relative dispersion calculated from the sample standard deviation and the mean with the following formula GRAND TOTAL i...

Page 41: ...nated under software control contact factory for details LOWER DISPLAY MENU CH NUMBR SC INDEX WT TYPE DISABLED n SAMPLES n GRAND ONE ID ALL ID ID NAME ID CODE CH NAME ASSGN F5 ASSGN F4 ASSGN F3 ASSGN F2 ASSGN F1 TIMEDATE MENU MAIN SETUP MENU ENABLED DISABLED CONTRAST FILTER MENU HIGH LOW NONE CONTRAST KEY FCTN TIMEDATE DATE TIME WEEKDAY INPUT MM DD YY INPUT HOUR MIN INPUT 1 SUN 2 MON 3 TUES 4 WED ...

Page 42: ...N 2 Push the UP scroll key until the menu selection is CONTRAST 3 Push ENTER The current setting for the contrast is shown 4 Adjust the contrast by pushing the UPor DOWN key Observe the display from the angle it is normally used Adjust the contrast just to the point where there is no ghosting of the unlit segments 5 Push ENTER 6 You are back in the SETUP menu Return to normal scale operation by pu...

Page 43: ... UP or DOWN key Shown is the order using the UP key For demonstration purposes we ll select ONE ID which will display the total weight of the current ID 5 When the desired lower display mod is shown push ENTER 6 You are back in the SETUP menu Return to normal scale operation by pushing EXIT SETUP 1 KEYFCTN 2 TIMEDATE 3 SET 4 TIME 5 HOUR MIN 6 20 30 00 6 7 8 1 Push SETUP twice The message reads KEY...

Page 44: ...r up command is received Therefore to achieve no worse than a 1 second turn on set the mode to the 12HR SEC or the 24HR SEC selection The mode has no effect on the power switch Operating the Clock from a battery powered MSI 3750CS has very little effect on battery life The LCD and LCD drivers use only minimal power The µP is only awake long enough to update the LCD so its average power consumption...

Page 45: ... Each segment represents successful packet transmissions When the Bar graph starts to shorten multiple retries of packet transmissions are failing This will happen when the signal is blocked or nearly out of range 2 PER CENT The Bar graph represents a user programmed span of the weight reading The 100 and 0 settings are programmable anywhere within the capacity of the scale 3 DISABLED Turns off th...

Page 46: ...2 Using the numeric keys enter the value that you want to equal 100 on the bar graph In this example we ll enter 20 kg as 100 13 Push ENTER back to the MENU level 14 Push the EXIT SETUP key to return to normal scale operation The Bar graph is now activated The 0 segment is equal to 10 kg the 100 segment is equal to 20 kg Bargraph Resolution The bargraph has 20 segments plus under range and over ra...

Page 47: ...o select the menu item LOCK MODE 4 Push ENTER The list of lockable items appears The numeric display indicates if the item is locked Loc or unlocked UnLoc The CLRLATCH item shown is for illustration only The item appearing will depend on previous lock mode operations 5 Use the UP or DOWN keys to scroll through the list Use the LEFT or RIGHT cursor keys to toggle between locked and unlocked In this...

Page 48: ...NTER The message reads ENTRCODE 4 Push ENTER if no security code is needed If a custom lock code is desired enter up to a four digit lock code with the Numeric keys IMPORTANT Make note of the code In this example we ll use 11 as a lock code 5 Push ENTER to lock the 3750 The display briefly indicates LOCKED then returns to the LOCK CODE menu 6 Push EXIT to return to normal scale operation All functi...

Page 49: ...ssage can include weight parameters time date and any random text the user requires using MSI codes These actions are independent of what the CellScale does and are independent of other 3750CS s that might be on the Network These Set Point actions are stored only in the 3750CS and must be programmed independently in all 3750CS s used in the system Parameters stored in the CellScale All parameters ...

Page 50: ... Set Point trips on at 1000kg Turns off at 980kg Although the CellScale allows it it never makes sense to program a Preact and a Postact for the same Set Point since they would cancel each other out However it is sometimes desirable to combine Preact or Postact with Deadzone This would provide hysteresis to the relay or hopper valve and prevent chatter To illustrate this building on our previous e...

Page 51: ...only input source 1 The only way to know which scale channel is programmed to what channel list location is to have a printout of the CellScale Channel List See the CellScale manual for more information on the Channel List OUTPUT DESTINATION OUT DEST The output destination defines the Set Point output at the CellScale end It has no effect on the 3750CS Enter 1 to 32 which corresponds to the Set Poi...

Page 52: ...e Set Point 3 Blank LCD the weight display is blanked while the Set Point is true 4 Blink the weight display blinks while the Set Point is true SET POINT OUTPUT SP OUTPT This menu directs where the SP String message goes Choices are Comport1 On or Off and Display On or Off TEST SET POINTS TEST SP Lets the user override the limits checking and just turn on the Set Point Use this for testing the eff...

Page 53: ... the OPER 1 menu appears 13 Push ENTER The current Operator function appears 14 Use the UP or DOWN key to select the desired operator In this example we ll use GT or EQ which means Greater than or Equals 15 Push ENTER The operator is now stored 16 Use the UP key to scroll to TRIGTYP1 17 Push ENTER The message shows the current trigger type 18 Use the UP key to choose the desired trigger type In th...

Page 54: ... ENTER The message reads NEW VAL1 11 Use the numeric keys to enter a value for Value 1 In this example we ll program 300 lb 12 When all digits are complete push ENTER 13 Use the UP or DOWN key to scroll to OP RELAT This is the menu which defines how the two thresh olds relate to each other 14 Push ENTER The message reads the current operator relationship which defaults to NONE 1 ALL SP 2 DISABLED 3...

Page 55: ...procedure requires knowledge of the CellScale Channel List In single channel systems the input source is always 1 which is the default In that case this procedure can be skipped If however a Set Point is assigned to a second or higher input or math channel this procedure is necessary For this example we ll assume a two entry Channel List and we ll assign this Set Point to channel list entry 2 1 IN...

Page 56: ...n and ASCII value in decimal notation 3 Use the UP key to scroll through the Screen mode choices Blink Blank Message and Normal In this example we ll choose BLINK 4 Push ENTER to store the screen mode The LCD Mode has been set To add functionality to the Set Point continue on to any or all of the fol lowing procedures or push the EXIT SETUP key to return to normal scale operation To Control the LC...

Page 57: ...equirements use round cable that has an outside diameter of 187 to 312 5mm to 8mm for proper sealing with the watertight fittings The terminal blocks are suitable for wires from 16 to 24 gauge There are up to four watertight fittings dedicated to the Set Point Outputs depends on options installed Multiple conductor cable will be necessary to access all of the relays Cable Installation Procedure 1 Un...

Page 58: ...Figure 1 Set Points are often used in conjunction with automatic conveyer belts By using the set point relays conveyor belts can be controlled by weight Using two Set Points allows speed control for dribbling or speeding up etc Figure 2 shows a simple arrangement where the motor is turned off when a set point is reached Pay attention to the current and voltage ratings of the relay when using them ...

Page 59: ...e able to take data directly from RS 232 and integrate the data into the control process See the RS 232 option section for details Figure 6 Logic Output Set Point 8 Set Point 8 is unique from Set Points 1 7 The output consists of a logic output capable of driving standard TTL loads As the output is in reality 4000B series CMOS devices it may be necessary to provide an external pull up resistor in ...

Page 60: ...nected to provide a reference level Output level is nominally 5V but can vary from 4 8 to 5 2V Figure 7 Besides providing a direct logic output to PLCs or other controllers the logic output can be used to drive external relays Figure 8 shows an example of the logic output driving an external N channel MOSFET which can turn on a high power relay Figure 8 ...

Page 61: ...d EIA 232 D downward compat ible with RS 232C Comm Port 1 is configured as DCE Cable connections include RXD input TXD output Ground CTS input RTS output and Shield Ground also known as Frame Ground CTS RTS handshaking is optional and the lines do not need to be connected COMM PORT CABLING 3750CS units have a water proof connector on the rear panel This connector mates with MSI P N 12023 which prov...

Page 62: ...Threshold to re enable the transmission Interval has no effect in this mode 9 Print Continuous or on Intervals The Data String can be transmitted continuously for driving scoreboards The MOTN DET menu determines if printing is allowed or disallowed when the weight is in motion and or not stable 10 Print on CTS Clear to Send a RS 232 handshake line By toggling the CTS line from space to mark the pr...

Page 63: ...ngs menu is used to set standard Comm Port parameters See To Set The Baud Rate for an example of how to use these setting menus BAUD RATE Standard Baud Rates available are 300 600 1200 2400 4800 9600 19200 and 38400 The 3750CS defaults to 9600 Baud STOP BITS Either 1 or 2 Stop Bits can be set Stop Bits default to 1 DATA BITS Either 7 or 8 Data Bits can be set If 7 bit mode is set Data Characters a...

Page 64: ...llowing procedure Alternate Characters and Control Characters 1 Push the TARE key This enables the ASCII numeric entry mode A place holder character indicates an ASCII character not included in the MSI 3750CS character set 2 Use the UP DOWN keys to scroll to the decimal number of the desired ASCII character Refer to the ASCII table in Appendix A The left numeric digits on the LCD represent the cha...

Page 65: ...r by pushing the POWER key To disable the Entire Print String Position the cursor blinking character over the first character in the Print String Push INSERT to insert a º ASCII 255 character at the beginning of the String Push ENTER twice to store the disabled string This proce dure is more efficient than using the CLEAR key to delete the entire String especially if the String is very long The 3750...

Page 66: ...be used to position data on a label without having to enter multiple spaces Input Data Form Bxx where xx is any number from 01 to 99 which equals the number of spaces desired Note Exactly two digits must follow the B command Output Data Form x spaces are output limited to 99 For more spaces use two B commands in series Note For spaces fewer than 5 it is more memory efficient to enter spaces instea...

Page 67: ...Length 10 Justification left position 10 always a space D5 2 5 J U L 2 0 0 0 Length 8 Justification left leading day zero suppressed D6 4 2 5 2 0 0 0 Length 8 Justification full leading month zero suppressed D7 2 5 0 7 2 0 0 1 E PRINT END OF LINE Use the E command to output the end of line string The EOL string is entered in the printer Format section Input Data Form E Output Data Form Sends out the ...

Page 68: ... Input Data Form L1 Print ID Code String 1 L2 Print ID Code String 2 Output Data Form Depends on user entered Strings Up to 20 bytes unless codes are embedded which could increase the length of data generated by this command Caution Do not embed an L command inside the ID String as this will cause an endless loop M PRINT WEIGHING MODE Use the M command to print either the current weighing mode or ...

Page 69: ...Form N Output Data Form N I D N A M E Length 8 Justification left Up to 8 Characters S PRINT START OF LINE STRING Use the S command to output the Start of Line string The SOL string is preprogrammed in the COMM PORT Setup Menus Input Data Form S Print SOL String Output Data Form Sends out the SOL string a maximum of 8 bytes T PRINT TIME Use the T command to print the current time register from the ...

Page 70: ...e lower display as setup by the user V9 Last Totaled Weight Note will print dashes if no weight has been totaled Output Data Form V1 V2 V3 V4 V9 2 0 5 0 2 Length 8 Justification full leading hours zero suppressed V5 1 2 3 4 5 6 7 8 9 Length 10 Justification right leading zeros suppressed V6 1 2 3 4 Length 5 Justification right leading zeros suppressed V7 1 2 3 4 5 6 7 8 9 1 2 3 4 Length 16 Justificati...

Page 71: ... T O T A L 1 2 3 4 T C N T Length 34 Justification Weight right Units left Mode left Weighments right T CNT left W8 m m m m m m m m Length 17 or 18 with DP in lower display Current Lower Display mmmmmmmm current lower display mode If gross weight is added W9 2 0 0 1 5 K G G R O S S If net weight is added W9 2 0 0 1 5 K G N E T If total register is empty W9 K G A D 2 T O T Length 20 Justification Wei...

Page 72: ...its left Mode left Y5 3 2 5 0 C O V A R Length 20 Justification Weight right Units left Mode left Y6 4 3 1 3 5 5 5 K G G T O T L Length 22 Justification Weight right Units left Mode left Y7 4 3 2 7 K G G A V G Length 20 Justification Weight right Units left Mode left Y8 1 2 3 4 5 6 G C N T Length 14 Justification Counts right Mode left Z PRINT ALL STATISTICS GRAND TOTAL Use the Z command to print the ...

Page 73: ...d all setups can be downloaded automatically The computer can query the scale at any time to get status weight or accu mulated totals General Protocol The MSI 3750CS responds to ASCII commands that consist of a two letter mnemonic Depending on the com mand a 1 or 2 digit item selection sub code may be required Certain commands require user supplied data Commands sent from a host computer can be ch...

Page 74: ... value GH Enter value to 100 in current weight units Terminate value with any command or a semicolon Bar Graph 0 value GZ Enter value to 0 in current weight units Terminate value with any command or a semicolon B a r G r a p h Mode GM 1 Disabled 2 Per Cent 3 RF Modem ID ID Enter value to 0 in current weight units Terminate value with any command or a semicolon ID Code Dis play mode IL 1 Disabled 2...

Page 75: ...Data Enable S 1 32 for Set Points 1 through 32 S sets which set point receives data with the other set point commands Set Point Dead Zone Value SD Enter value in current units Terminate weight value with a semicolon or another command All set points mode enable SE 1 Disabled 2 Enabled Set Point Latch SL 0 Off 1 On Set Point Mode SM 1 Disabled 2 Total 3 Net Gross 4 Gross Set Pt Message to Comm1 SO1...

Page 76: ...A Input tare value in current units U n i t s P r i n t Mode UP 1 Upper Case 2 lower case Set Units UN 1 lb 2 kg 3 tons short 4 metric tons 5 oz 6 g 7 daN Example ST1 150 sets the first set point value to 150 Example ST2 200 sets the second set point to 200 With both examples as shown a set point window has been made from 150 to 200 Example TA20 0 sets the tare to 20 0 If your printer prints lower ...

Page 77: ...Index Key See Accessing multiple scale inputs 2 Follow the Reset Calibration procedure below 3 If the unit is legal for trade set the appropriate standard with the LEGAL STANDARD procedure If the unit is to be used with metric units only set the standard to METRIC else use INDUSTRY 4 Follow the CALIBRATION procedure to set capacity d and then calibrate 5 Reseal the Cal port when finished For recali...

Page 78: ...ION COMPLETELY RESETS CALIBRATION INITIAL CALIBRATION STANDARD CALIBRATION CAL ZERO CAL Zero Cal OK WAIT up to 10s INPUT VAL TEST WEIGHT LOAD SCALE Next Test Wgt SPAN CALIBRATION Zero Cal ERROR SPAN Cal ERROR Too much dead load or offset in the load cell Exit key or 5th Span Wgt SETUP INPUT POWER Next Span Weight Too little or too much weight on the scale ZERO 0 0 9 0 9 CAL STD CAL SELECT CAL UNIT...

Page 79: ...nitialize while the registers are cleared If you change your mind pushing EXIT will cancel the Reset All operation 2 3 RESETALL R U SURE 2 CALSETUP 3 RESETCAL 1 Expose the Calibration Seal Port by removing the seal screw on the left side of the 3750 Meter Casting with a Phillips Head Screwdriver The display reads CALSETUP 2 Insert a small non metallic screwdriver or the wooden stem of a Q Tip and ...

Page 80: ... Calibration See Enable Calibration Contact MSI for details on the differences between the various configurations To Select the Legal Standard 1 1 STANDARD 2 INDUSTRY 3 NIST 3 OIML 3 METRIC 4 STANDARD 5 or 1 Use the UP or DOWN scroll key to scroll to the STANDARD message 2 Press ENTER The current Standard is displayed 3 Use the UP or DOWN key to scroll through the Standards options For this exampl...

Page 81: ...nes the overload value 4 Press ENTER to set the Calibration Units 5 Next set the capacity of the system in Calibration Units The display reads CAPACITY Use the numeric keys to set the capacity value In this example we ll set the meter Capacity at 1000 kg Capacities range up to 999 999 calibration units in any units During capacity entry you can back step delete any incorrect entry using the CLR ZE...

Page 82: ... 5th Cal Point 15 CAL OK STORING 15 or TO ENABLE DISABLE AZM AUTO ZERO MAINTENANCE AZM is used to adjust out variations at zero caused by debris or water on the scale temperature drift and any other minor variation that affects the zero setting Typically AZM is set to 0 5d or 1d which is adequate for most modern scale systems The CellScale allows for a much greater AZM range non legal for trade sc...

Page 83: ...ed at 0 6d and cannot be altered In systems used for industrial applications the motion band can be adjusted larger Adjusting the motion band larger can help in medium accuracy applications where there is a lot of vibration or noise and it is difficult to hold the weight steady enough to tare zero or total For example setting the motion band to 5 d would allow a tare or zero or total to be as much ...

Page 84: ...pecific knowledge of the internal workings of the CellScaleA D parameters that are only accessible through the terminal interface Contact MSI for additional information 3 MSI WT The user must know the active weight MSI WT of the scale itself This number is not easy to determine and is usually provided by MSI for MSI designed load trains For load cell systems not supplied by MSI please contact MSI f...

Page 85: ...ibration unit as shown on the display 13 Push ENTER to store the MSI WT 14 Use the UP key to locate the submenu USER WT 15 Push ENTER The current user weight it displayed 16 Using the numeric keys input the USER WT For this example we ll input 240 kg The USER WT is equivalent to the dead load of the scale In MCS and OMS systems the USER WT is the weight of the magnet and chains beneath the scale 1...

Page 86: ...1 TIMEDATE MENU MAIN SETUP MENU ENABLED DISABLED CONTRAST FILTER MENU HIGH LOW NONE CONTRAST KEY FCTN TIMEDATE DATE TIME WEEKDAY INPUT MM DD YY INPUT HOUR MIN INPUT 1 SUN 2 MON 3 TUES 4 WED 5 THUR 6 FRI 7 SAT SETUP SETUP VIEW UNITS TOTAL TEST STRING 2 STRING 1 STATS SETPOINT PEAKHOLD RF NTWK MODEM SC INDEX ID NUMBR GRNDTOTL CLRLAST 2KEYCLR 1KEYCLR CLRLATCH DISABLED KEY FUNCTION MENU 24HR SEC 24HR ...

Page 87: ...CellScale System 3750CS 5 User Guide Page 87 MEASUREMENT SYSTEMS INTERNATIONAL Software V2 21 or greater 2nd Generation Modem UNIV TAR ...

Page 88: ...Page 88 MSI 3750CS 5 RF Weighmeter User Guide 3750CS CELLSCALE RF DIGITAL WEIGHT INDICATOR Enter up to 8 Characters Enter up to 255 Characters Enter 1 Character Enter 1 1 254 ...

Page 89: ...2 21 or greater 2nd Generation Modem DANEWTON GRAMS OUNCES METRIC T TONS KILOGRAM POUNDS POWER SRC MENU PWR BATT PWR VEHI PWR AC BACKLIGHT MENU ON AUTO OFF 24 HOURS 8 HOURS 4 HOURS 2 HOURS 1 HOUR 30 MIN 10 MIN DISABLED AUTO OFF MENU POWER SETUP MENU LIGHTING AUTO OFF EXIT SETUP POWER POWER ...

Page 90: ...Page 90 MSI 3750CS 5 RF Weighmeter User Guide 3750CS CELLSCALE RF DIGITAL WEIGHT INDICATOR ...

Page 91: ...CellScale System 3750CS 5 User Guide Page 91 MEASUREMENT SYSTEMS INTERNATIONAL Software V2 21 or greater 2nd Generation Modem ...

Page 92: ...Page 92 MSI 3750CS 5 RF Weighmeter User Guide 3750CS CELLSCALE RF DIGITAL WEIGHT INDICATOR APPENDIX B ASCII CHART ...

Page 93: ...cted scale channels Clear Latch Used to cleared latched Set Points Peak Hold Captures maximum readings String1 and String 2 Displays user configured print strings asso ciated with each ID Test Performs LCD display test Units 1 button access to switching weight units Disabled no function assigned Programmable Features Automatic or Manual Tare entry 32 Set points with messaging capability Peak Hold f...

Page 94: ...al Set Points an alarm can sound at any weight Can also be used for accept or an out of limits indicator for blind check weighing Can also be configured as a totalize alert External Totalize Switch included with Audible Totalize Indicator A transient protected switch input with connector for remote totalize switch Normally open momentary switch is supplied by the end user Supplied with 13 4m cable ...

Page 95: ...CellScale System 3750CS 5 User Guide Page 95 MEASUREMENT SYSTEMS INTERNATIONAL Software V2 21 or greater 2nd Generation Modem APPENDIX D INTERNAL WIRING ...

Page 96: ...eight pre paid In no event shall the Company be liable for the cost of any repairs or alterations made by others except those repairs or alterations made with its specific written consent nor shall the Company be liable for any damages or delays whether caused by defective workmanship materials or otherwise The Company shall not be liable for any personal injury or property damage resulting from th...

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