Fairbanks H90-5200-A User Manual

Operating Manual

H90-5200-A

Digital Instrument

50515

Issue #2 4/04

SET POINT

= CENTER OF ZERO

SP1

SP2

SP3

SP4

SET POINT

CONTROL

TEST

PROG

DATE

TIME

4-20mA

SET PT

CLEAR

NET

TARE

I/O

ENTER

3051

Amendment Record

H90-5200-A

Digital Instrument

50515

Manufactured by Fairbanks Scales Inc.

821 Locust

Kansas City, Missouri 64106

Created 3/99 Issue #1 3/99 New Product Release

Issue #2 4/04 Added Printer Information and Computer Modifications

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Table of Contents

SECTION 1: DESCRIPTION

A. Introduction 4 B. Specifications 4 C. Keypad Description 7 D. Indicator Description 9 E. Back Panel Description 9 F. Basic Weighing Operations 9 G. Power-Up Test 11

SECTION 2: PROGRAMMING

A. Security Code “S.Code” Operation 12 B. Programming Operating Parameters 12 C. Displaying and Setting Time 16 D Displaying and Setting Date 17 E. Test Mode 17 F. SETPOINT Operation And Programming 18 G. Serial Output Operation and Programming 27 H. Computer Commands 30 I. Computer Command Protocol 33 J. Programming the SMART 4-20mA Analog Loop 33

SECTION 3: INSTALLATION

A. Instrument Mounting Options 36

SECTION 4: TROUBLESHOOTING

A. Troubleshooting 37

APPENDIX I: Quick Reference Chart 38 APPENDIX II: Serial Output Installation 39 APPENDIX III: Switch Settings for Selected Printers 42 APPENDIX IV: Wiring Diagram for Serial Outputs 47 APPENDIX V: Serial Output Data Format 49 APPENDIX VI: Wiring Diagram for Smart 4-20 Output Accessory 51 APPENDIX VII: Setpoint Outputs VS. Calibration 52 APPENDIX VIII: Pillar Accessory lnstallation 53 APPENDIX IX: ASCII Character Chart 54 APPENDIX X: Keyboard Schematic / Wiring Diagram 55 APPENDIX XI: Remote Switch 56 APPENDIX XII: Summary of Error Messages 58 APPENDIX XIII: Wall Mounting Bracket 59 APPENDIX XIV: Print Samples 60

DISCLAIMER

Every effort has been made to provide complete and accurate information in this manual. However, although this manual may include a specifically identified warranty notice for the product, Fairbanks Scales makes no representations or warranties with respect to the contents of this manual, and reserves the right to make changes to this manual without notice when and as improvements are made to the product.

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SECTION 1:

DESCRIPTION

A. Introduction:

The model H90-5200-A indicator is a general purpose indicator that can be used with a wide variety of Fairbanks platforms. Stainless steel construction makes the instrument well suited for use in wash-down locations. The standard unit can be bench, wall, or pillar mounted.

The H90-5200-A features a bi-directional serial output and four setpoint outputs. Front panel programming enables easy setting or changing instrument operation parameters. The instrument also includes all of the standard weight processing controls, such as digital tare, tare recall, automatic tare, push button zero, print, and lb/kg conversion.

B. Specifications:

1. Model Number: H90-5200-A

2. Units: lb, kg, lb/kg, or custom (no units indicator)

3. Accuracy: Commercial, 10,000 divisions Non-commercial, 20,000 divisions

4. Load Cells: Up to 4-350 ohm load cells, or 12-1,000 ohm load, Excitation 10VDC

5. Division Size: Programmable from 0.0001 to 50 for both lbs. and kgs.

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3051

6. Display: High visibility, 6 digit LED display, with 0.8 inch digits. Separate indicators for:

Left Side Display Right Side Display

SP Enable lb SP 1 kg SP 2 NET SP 3 TARE SP 4 ID

Center-of-Zero Indicator appears in the display.

7. Display update rate: Programmable for 0.1, 0.3, 0.5, 0.8 or 1.0 seconds.

8. Digital Filter: Programmable - 5 levels

9. Tare: 10 key numeric TARE entry or Auto Tare entry, TARE operation(s) may be

disabled in the setup mode.

10. Programmable Features: Primary Units, Scale ID, Time and Date in Military, US, and International Formats, Security Code, Switch Inhibit, and remote switches.

11. AUTO-ZERO tracking: Programmable OFF, 0.5d, 1 .0d, or 3.0d

12. Auto-Zero Time Delay: Programmable from 1 to 6 seconds.

13. Re-zero Range: Programmable +/- 2% or 100% of capacity

14. Overcapacity Warning: The display will show “—OL—” if the weight exceeds

105% capacity

15. Underload Warning: The display will show “—UL—” if the weight on the platform is below the A/D input range.

16. Balance/Motion band: Programmable 0.5,1.0, 2.0, 3.0d

17. Controls: 23 key keypad

18. Setpoints: Four setpoints with open collector outputs rated at 60VDC @ 100mA.

Setpoint status is shown by 4 LED indicators, one indicator to show the setpoints are active, and a separate indicator for each setpoint to show its status.

Setpoint mode available with dribble, preact, discharge and zero band. Checkweigh modes available with preact, discharge and zero band. Batch modes available with dribble, preact, discharge, zero band and setpoint

inhibit.

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Auto Batch mode available with dribble, preact, discharge, zero band, setpoint inhibit, setpoint auto zero, delay 1, and print.

Auto Batch Repeat mode available with the same features as Auto Batch but includes delay 2.

19. Serial output: One bi-directional serial port, which may be configured for RS-232 or 20mA current loop. Selectable BAUD rates are 300, 600,1200, 2400, 4800, 9600, and 19200.

20. Power: 100-130VAC, 50/60 HZ 10 watts standard 200-250 VAC, 50/60 HZ 10 watts optional

Options:

Accessories:

a. Second Serial Output: Accessory 145 (1-57364-1) - Output configured for 20mA current loop Accessory 146 (1-57365-1) - Output configured for RS-232 Accessory 147 (1-57401-1) - Output configured for RS-422 or RS-485 b. Accessory 148 (4-57402-1) - SMART 4-20mA analog output. Output can

also be configured for 0-20mA, or 0/1-5VDC, 0-10VDC with customer supplied resistor.

NOTE: One Accessory, A or B can be used , NOT BOTH.

c. Accessory 149 (4-57568-1) - NEMA 12 Relay Accessory. Accessory can be attached to instrument or remote mounted. Accessory is driven by setpoint outputs and provides (4) Form C contacts rated at 5 Amps @ 250 VAC or 5 Amps @ 30 VDC.

d. Accessory 150 (701138) - Cable for remote mounting of Accessory 149 or Accessory 151, up to 100 ft from the instrument

e. Accessory 151 (4-57838-1) - NEMA 4 Remote Relay Accessory Accessory is driven by setpoint outputs and provides (4) Form C contacts rated at 5 Amps @ 250 VAC or 5 Amps @ 30 VDC.

f. Pillar Accessory - The H90-5200-A is compatible with all Series 7 Pillar

Accessories

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FIGURE 1-2:

C. Keypad Description

The functions of the front panel keys vary depending on the mode in which the

instrument is operated. This Subsection defines the operation of each front panel key.

Refer to Figure 1-2.

START: Initiates setpoint batching operation to pre-selected setpoint weight.

Batching modes only.

TRIM : Overrides setpoint control to add additional weight in touch controlled

increments. Manual batch mode only.

STOP: Overrides setpoint control cycle to turn off all set points, in batching

modes only. During batching it is used to change selected setpoint(s) for subsequent batching operation.

ID: Up to a 6 - digit product ID for printer/computer print out, not maintained at

power loss.

TARE RECALL: Tare retrieval. Displays current tare for aprox. 5 seconds.

FUNC: Press function key and then one of the following keys to enter special

modes described below. Up to six digit security code is then required (if security code entered does not equal 0) to change displayed value using keypad. Refer to Section 2 for further information on all function key operations.

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SET POINTS

ENABLE

SP 1 SP 2 SP 3 SP 4

START

TRIM

STOP

= CENTER OF ZERO

TARE

RECALL

FUNC

PROG

TIME

TEST

DATE

123

SET PT

CLEAR

4-20mA

I/O

ENTER

GROSS

NET

UNITS

AUTO TARE

lb kg NET TARE ID

ZERO

3050

ST ART

TRIM

TARE

RECALL

FUNC

a. FUNC 1: Setpoint key will access setpoint setup mode. b. FUNC 2: 4-20 ma key will access the Smart 4-20 ma current

loop calibration mode. c. FUNC 3: I/O key access the serial I/O setup mode. d. FUNC 4: Accesses and displays time. A new time can now be

entered or ENTER can be pressed to keep the current time. e. FUNC 5: Accesses and displays date. A new date can now be

entered or ENTER can be pressed to keep the current date f. FUNC 7: Program key accesses and displays the current

operating parameters of the instrument.

g. FUNC 8: Instrument test. Shows security level, flashes A/D

counts, deadload counts, span counts, display test, RAM Test,

EE Prom Test, and Switch Test.

GROSS/NET: Switches weight display mode to Gross or Net, or used to exit programming menu.

UNITS: Allows the displayed weight to be converted to new weight units if the option was enabled.

AUTOTARE: Will set Tare memory equal to the Gross weight on the Platform (which will then force the Net weight to zero). Auto tare must be enabled and gross weight cannot be negative. Display will automatically switch to Net mode, not maintained at power loss.

ZERO: Will set the Gross weight equal to zero provided the weight to be zeroed does not exceed the programmed zero range.

PRINT: Causes the instrument to transmit information to the output device if enabled.

CLEAR: This is a dual function key. The first time it is pressed it produces a decimal point. Pressing the key twice “CLEARS” the last entry made.

KEYPAD: Keys “0” through “9” and “.” and “ENTER” are used to enter Tare, programming codes, setpoints, etc.

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FUNC

SET PT

GROSS

NET

FUNC

4-20mA

I/O

TIME

DATE

PROG

TEST

AUTO TARE

O/U

CLEAR

789 456

123

D. Indicator Description

lb, kg : Indicates the units of the displayed weight. If neither indicator is lighted, then

“Custom Units” is enabled.

NET: Indicates the instrument is displaying NET weight. TARE: Indicates the instrument is displaying TARE weight. ID: Indicates the instrument is displaying a product ID or date in international date

(day/month/year) format.

ENABLE: Indicates the setpoint outputs are active SP1, SP2, SP3, SP4: Indicates the particular setpoint output is ON when the SP

Enabled indicator is also ON.

C = Center-of-Zero: A “C” will appear in the left most digit to indicate that the weight is

within a quarter grad of zero.

E. Back Panel Description

1. Serial Output Port

2. Accessory Port

3. AC Power cord, water tight gland.

4. Load Cell, water tight gland.

5. Setpoint output, water tight gland.

F. Basic Weighing Operations

1. General Gross Weighing

a. Push GROSS/NET to select Gross. When the instrument is in Gross Mode,

the NET Indicator light will be OFF.

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3 2 14

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b. With the platform empty push ZERO, the display will indicate zero. c. Place the loaded carrier on the platform. d. Read the Gross weight at the display.

2. Net Weighing Using Keypad Tare

a. Enter the known Tare weight through the keypad. b. Press ENTER c. The instrument will display a negative weight value and the NET Indicator will

be ON.

d. Place filled container on platform. The display will show the Net weight of the

material.

3. Net Weighing Using AUTO TARE

a. Place an empty container on the platform. b. Press the AUTOTARE key.The empty container weight is transferred to tare

memory. c. The weight display will now be zero and the NET Indicator light will be ON. d. Place the material in the container and the instrument display will show the

Net weight.

4. Entering Product ID

a. Press lD. b. Current ID is displayed. c. Press GROSS/NET to exit and retain displayed ID, or enter new ID (up to 6

digits) using the keypad. Press ENTER.

5. Printing Weight Information

a. In any mode above, Press PRINT when weight on the platform is stable.

6. For Other Operating Features, Refer to Section 2

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G. Power-UpTest

Upon instrument power-up the H90-5200-A will perform the following tests:

1. RAM Test - The RAM test verifies the operation of the processors external memory device.

2. Display Test - The display will perform a warm-up sequence. This routine is designed to test that all display segment lines, digit lines, and annunciator LEDs, have no defects. This is a passive test and the user must observe the display throughout the test to check for any anomalies.

3. EEPROM Read -The processor will attempt to retrieve the stored scale programming data from the EEPROM. This data includes: deadload and span counts, grad size, capacity, security level, etc.

If the processor detects any out-of-range data, it will repeatedly request data from the EEPROM until the retrieved data is deemed valid. During this period, the display will flash “EE Err.”

Very often the problem is with the data itself and not the actual hardware. The two most common causes are as follows:

a. A replacement board has just be installed in the instrument and this is a

first-time power-up. Thus, the current EEPROM data might not be appropriate for the software in use.

b.You are using a new (or different) software program or revision level than

used at the previous instrument power down. This result is that the new software might be trying to access data from the wrong areas of memory.

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SECTION 2:

PROGRAMMING

A. Security Code “S.Code” Operation

If the security code is programmed with a value other than zero, the display will indicate “S.COdE” when accessing the front panel programming. The operator must enter the security code through the keypad and then press ENTER. The entered keys will then be compared to the security code. If the correct security code has been entered, the display will enter the appropriate programming routine, otherwise the instrument will return to the weigh mode.

B. Programming Operating Parameters

When in the program mode, the value displayed at each step is the value currently stored in the program. When in the programming mode, if a key is not pressed within one minute, the instrument will time out and return to the weigh mode Some of the keys and switches have special functions in the program mode.

These functions are defined as follows: The ENTER key is used to store the displayed value in memory and advance to the

next program step. The UP or DOWN arrow keys or the numeric keypad (0-9) can be used to change the

displayed value. The GROSS / NET key can be used to immediately exit from most programming

menus. To program the operating parameters, press the calibrations switch, SW3, located on

the main PC Board next to the load cell terminal block (standard programming), once, or press FUNC 7 (front panel programming).

1. Program Steps

NOTE: If the programming mode is entered by pressing the SW3 switch, all of the

following programming steps can be changed. If the programming mode is

entered via the front panel, some steps may not be able to be changed

depending on the scales security level (selected in Step 15).

2. Program Number Display

This display will show the program number and revision level (P294X). This information should be recorded for reference should any problems arise with the operation of the scale. This is a nonprogrammable step.

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3. Weight Units Selection

The display will read “ U “, and one or more of the units indicator lights may be ON. The lighted indicator(s) show the current selection(s). Units of lb,kg, lb/kg or custom (no units indicated) can be selected, depending on the operators requirements. Custom or “no” units are not front panel selectable

a. Primary Weight Unit Selection

This program step will only appear if lb/kg was selected in step 2. The display will read “ PU “ and ONE of the units indicator lights will be ON. The light indicates the primary weight unit. The primary weight unit is the weight unit the scale is calibrated in and the units the scale will start in when it is powered up.

4. Grad Size Selection

This display will read “GSxxxx”, where the “xxxx” is the grad size. The grad size displayed is for the primary units selected in program step 2a. Grad sizes for other weight units are dependent on the primary unit grad size and are not independently programmable.

Grad sizes from 0.0001 to 50 can be selected. If an unacceptable grad size is selected, an error message “ElL” or “E1H” will be displayed. A grad size is unacceptable IF The number of divisions for any weight unit is less than 100 or more than 10,000 (number of divisions = capacity/grad size). These error messages and inhibits will only be displayed when programming through the front panel.

5. Balance / Motion Band Selection

The display will read “bALx.x”, where “x.x” is the width of the motion band in divisions, “0.5,1.0, 2.0 or 3.0”. If the current A/D reading exceeds the digitally filtered output by more than the motion band for 1/2 second, there is “motion” on the scale and the instrument will switch to the fast filter mode, where the display tracks the input. If there is “motion” on the scale, zero, autotare and print operations are inhibited until “motion” stops.

6. AUTOZERO Tracking (AZT) Selection

The display will read “AO x.x”, where the “x.x” is the width of the AZT band in divisions. AZT enables the instrument to automatically zero off small changes in the zero balance of the scale. For an AZT to occur, the weight must be within the AZT band for a time defined by AZTD (see 7. Auto Zero Time Delay).

7. Auto Zero Time Delay

The display will read “AOtd x”, where x is 1, 2, 3, 4, 5 or 6. The Auto Zero Time Delay is the number of seconds that the weight must be stable in the AZT band before an Auto Zero operation will take place. AZTD will not be offered unless AZT was enabled in the previous step.

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8. Zero Limit Selection

The display will read “OL xxx”, where the “xxx” is 100 or 2. The Zero Limit controls the weight range over which the zero switch will operate. The weight range is either 100% or +/- 2% of the scale capacity.

9. AUTO TARE Selection

The display will read “AtArEx”, where the “x” will be a 1 or a 0. The “1” indicates the AUTOTARE key is enabled and the “0” indicates disabled.

10. Keyboard Tare Selection

The display will read “tArE x”, where “x” will be a 1 or a 0. The “1” indicates the keyboard tare is enabled and the “0” indicates the keyboard tare is disabled.

11. Display Update Rate Selection

The display will read “SECx.x”, where the “x.x” represents the update rate in seconds. The rates available are 0.1, 0.3, 0.5, 0.8, and 1.0.

12. Digital Filter Selection

The display will read “FF x”, where the “x” is the digital filter factor. The available values are 0, 1, 2, 3, or 4. A “0” will disable the filter, a “1” will give a minimum amount of filtering, and a “4” will give the maximum amount of filtering. The digital filter is used to stabilize the weight display, when it behaves erratically due to low signal levels or unstable weight on the platform. The more filtering, the more stable the display will be.

NOTE: When using the remote display accessory, the update rate

must be 0.5 seconds or greater

13. Scale ID Selection

The display will read “id xxx” where “xxx” is the scale ID number used for polled computer serial interface. If the computer polled with ID option is not used, ID should be set to “0”. If the computer polled with ID option is used, any number from 1 to 255 may be entered.

14. Time/Date Format Selection

The display will read “tdxxyy”, where “xxyy” is the format used to display and print time (xx) and date (yy). The options available are “12” or “24” hour clock for time and “US” (mo/day/yr) or “id” International date (day/mo/yr).

15. Security Code Selection

The display will read “S.COdE” to indicate the security code selection step. The current security code is not shown. The security code is used to limit access to front panel programming. A security code up to 6 digits long may be used. A security code of “0” enables free access to all front panel programming.

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16. Security Level Selection

The display will read “SL x”, where “x” is a “0”, “1”, or “2”. The “0” enables full programming capability from the front panel for non-commercial applications. The “1” enables limited front panel programming for commercial applications. The “2” disables all front panel programming for commercial applications.

CAUTION:

a. If Security Level “1”, or “2 “ is selected at this step, Security Level “0”

CANNOT be selected at a later time from the front panel. Be sure of your selection

before you continue

b. If Security Level “1” is selected, program steps 3, 4, 5, 6, 7, 14 and 15 cannot

be changed from the front panel.

c. If Security Level “2” is selected, NO parameters can be changed from the front

panel

d. Security Level must be set to “1” or “2 “for commercial applications. If the

Security Level is set for “0”, the instrument is NOT considered “LEGAL FOR TRADE”, therefore the Security Level should be set for “1 “ or “2” for any

commercial application.

17. Inhibit Switch Selection

The display will read “inhS x”, where x will be a “1” or a “0”. If “1” is selected then one or more front panel switches may be inhibited from operating. If “0” is selected then all switches are operational. All keys except the ENTER key may be inhibited. If “1” is selected, the display will show which switches are inhibited upon re-entering programming mode. If no switches are inhibited the display will be blank.

a. If the displayed list is acceptable, press the ENTER key. b. If a new key inhibit list is wanted

1) Press the keys that are to be inhibited

2) When the list is complete, press the ENTER key

If there are more switches inhibited than the display can show at one time, the display can be shifted over one switch at a time by pressing the FUNC key. Pressing the ENTER key will retain the current list. If any other key is pressed the current list will be cleared and a new one started. The new list will end when the ENTER key is pressed.

Some examples of this feature are:

a. The instrument is monitoring the weight of a hopper and the user is

afraid someone will accidentally ZERO the indicator and lose the weight

readings. By inhibiting the ZERO switch this can be prevented. b. The supervisor feels the instrument is too complicated and the operator

could accidentally change the desired setup. Inhibit all the switches

except ZERO and that is the only key the operator can use. c. Instrument is hooked to a remote computer and user doesn’t want

anyone to interfere with the computer control. Inhibit all the switches once

the indicator is setup.

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NOTE: When a switch that has been disabled/inhibited is pressed,

the display will momentarily flash “Error”.

18. Remote Switch Enable

Three (3) remote or external switches can be used to emulate only the following keys, ZERO, START, PRINT, AUTO TARE,TRIM, TARE RECALL, UNITS, STOP. All remote switches must be momentary dry contact type (without power), and are hard wired to the optically isolated 10 position connector, TB3 on the main board. See Appendix XI for wiring diagram.

a. Display will read: “rS 0” where rS means remote switch and 0=OFF. By

pressing”1”then “enter” the display will read”rS 1 “and enable this function. b. The display will read “rS1 ” which means remote switch 1 is enabled for

the ZERO function.( See chart of key symbols in APPENDIX XII). To

change, press the key you wish to be remotely controlled and press “enter”. c. The display will advance to show “rS2 A” meaning remote switch 2 is set

to function as an AUTO-TARE key. Change as required by pressing the

key you want to emulate, then press “enter”. d. The display will advance to show “rS3 P” meaning remote switch 3 is set

to function as a PRINT key. Change as required by pressing the key you

want to emulate, then press “enter”. e. After “enter” is pressed for “rS3 X”, the display will return to the weigh

mode

C. Displaying and Setting Time

1. From a gross or net weight display, press FUNC, the display will indicate

“Func”.

2. Press the 4 key.

3. The display will indicate the current time where “A” stands for AM and “P”

stands for PM (e.g. “11:36 AM will be shown as “1136 A”).

If the time was set in 24 hour military format (00:00 thru 23:59), the AM or

PM legends will not be shown.

4. Press ENTER if time is correct The display will return to the weigh mode or

enter the correct time by pressing the numeric keys “0” through “9” .Enter the

hours first and then the minutes (see example).

The time must be entered in 24 hour military format (0000 through 2359).

Example: Military Time Setting To set the time to 8:49AM, enter “849”. To set 8:49 PM, enter “2049”. Do not enter leading 0’s.

5. When the correct time is entered, press the ENTER key to store the

displayed time.

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D. Displaying and Setting Date

1. From a gross or net weight display, press FUNC, the display will indicate

“Func “.

2. Press the 5 key. The display will show the current date e.g. 121598.

If ID LED is ON - the date is in International format. Standard Format - MM

DD:YY International Format - DD MM:YY

3. Press ENTER if the date is correct. The display will return to the weight

display.

4. Enter the date by pressing the numeric keys “0” through “9” (omitting leading

zeroes). Enter the date as day/month/year or month/day/year format (see examples).

When entering days 1 - 9 the digits must be preceded by a zero (e.g. 06 for the sixth day). Entering only a 6 will cause the entry to be interpreted as the 60th day of the month ).

Examples: 1. To set the date to January 16, 1999 in month/day/year format, the key

sequence would be as follows: 11699 enter. (US format).

2. To set the date to 16 January 1999 in day/month/year format, the key sequence would be as follows 160199. (International format).

5. Press the ENTER key to store the displayed date. The time and date format is set when programming operating parameters.

E. Test Mode

The 8 key is used by the operator to verify proper operation of the instrument.

1. Select the Gross or Net Mode.

2. Push the FUNC key, then the 8 key.

The instrument will show the security level “SLx and then a blinking internal counts display, which is equivalent to the weight on the platform This function can be used to verify that the A/D is operating properly. Press ENTER to continue.

3. Instrument will display in the following sequence: a. The deadload counts, “0 xxxx”. b. The span counts, “S xxxx”. c. All segments and legends are lit to verify display operation. d. A RAM and EEPROM test are done. A summary of error messages

may be found in Appendix XII.

4. A switch test can be done by the operator or ENTER can be pressed to exit. When a particular switch pressed, it’s corresponding display may be found in Appendix XII.

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F. SETPOINT Operation And Programming

1. General Description, SETPOINT Modes The Setpoints are used to control alarms, gate controls etc. that are furnished by the

customer. Setpoint operation is dependent on Gross or Net weight. The setpoint outputs can only change state when the instrument is displaying Gross or Net weight. If the instrument is not displaying Gross or Net weight, the setpoint outputs will revert to their OFF state. A setpoint output is ON if the Setpoint “Enable” LED is lighted AND the individual Setpoint LED is ON.

Setpoint Mode Summary

Refer to Appendix VII for more information.

a. Individual (Single Feed) Setpoints Fast Feed Cutoff = SP - P b. Paired (Dual Feed) Setpoints

Fast Feed Cutoff = SP - D - P Dribble Cutoff = SP - P SP (Setpoint) = weight value desired at end of weighing operation D (Dribble) = weight range at end of setpoint over which material flow

changes, usually from “fast” to “slow” feed

P (Preact) = weight value which is used to compensate for material in

suspension or other delays in control loop

There are six operating modes. “Mode 0” turns the setpoint option “OFF”. Two modes are for setpoints only and three modes are for batching operations. In addition, a zeroband operation in the Gross Mode only, up to capacity, is available in all modes, if Setpoint 4 is available. The following sections explain each of the modes.

MODE 0- SETPOINTS OFF

The display shows “SP OFF”. The setpoint outputs are disabled.

MODE 1- SETPOINT MODE

The display shows “SP SP”. The setpoint mode is used for simple operations Where the setpoint outputs are not directly controlling valves or gates and it is not desirable or necessary to manually “start” and “stop” the setpoints.

Setpoint mode configures the outputs as simple “dumb” setpoints. When the absolute value of the weight is less than the setpoint, the setpoint output is ON and when the absolute value of the weight exceeds the setpoint, the setpoint output is OFF. The setpoints are always active when the instrument is monitoring weight and the START, TRIM, and STOP keys are not functional.

Up to 4 setpoints may be enabled and dribble, preact, discharge and zeroband options are available. Some application examples are:

a. turning on a light to signal that a box has been filled to the proper weight.

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+ 42 hidden pages

Fairbanks H90-5200-A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual