GEM4COV-L.
GEM4COV-L.QXD 9/22/2006 3:39 PM Page 2 (1,1) INTRODUCTION The Gemini 4100 and 4200 are both units in a multi-purpose series of industrial control units that are field-programmable to solve multiple applications. This series, known as the Astro-Line family of products, is built around the concept that the end user has the capability to program different personalities and functions into the unit in order to adapt to different indication and control requirements.
TABLE OF CONTENTS I. II. III. IV. V. VI. VII. VIII. IX. X. XI. XII. XIII.
GENERAL DESCRIPTION A Counter Load feature enables the operator to modify the count value under circumstances that occur when flawed material has been counted and it is necessary to adjust the count value accordingly. The Counter Load feature can be “locked out” in applications where it is not required. The Rate Indicator portion uses a time interval method (1/tau) to calculate the rate value. This method enables high resolution at all rates.
A mode selection is made by entering a new number. On some of the entries, you have the option of a plus “+” or minus “-” sign. In the cases where a “+” sign is required, no sign will be displayed. If you do enter a “-” sign (using the “+/-” key), a minus sign will be displayed in front of the appropriate digit. PROGRAMMING THE GEMINI When your Gemini arrives from the factory, it has already been programmed to function as a counter and rate indicator.
PROGRAMMING THE PRESET, SCALE FACTORS, TIMED OUTPUTS & COUNTER LOAD VALUES (Cont’d) The new value will be entered when the “E” key is pressed. The Scale Factor Value will have a direct effect on the preset being entered (if assigned to the counter). For Scale Factors greater than one, the preset value should be an integer multiple of the Scale Factor. If it is not, the Gemini will automatically adjust the preset value up or down to force it to be evenly divisible by the Scale Factor.
It is possible to change the counter values of the Gemini. This feature can be enabled or disabled by the programming of the “Operator Accessible Functions Modes”, function code 66. The “Counter Load Value” is not stored when the unit is powered down. When the unit is powered up, the Counter Load values for both counters (if Dual counter personality) are reset to zero. Once changed, the values will be held until the unit is again powered down.
INITIAL FACTORY CONFIGURATION Keys struck 4,1 4,2 4,3 4,4 4,5 4,6 5,1 5,2 5,3 5,4 5,5 5,6 6,1 6,2 6,3 6,4 6,5 6,6 3 3 1 2 Display 41 1 42 3 43 1 44 1 45 1 46 1 51 2 52 3 0000.10 54 3 0000.10 56 1 61 4 62 1 63 1 64 4 65 1 66 1 01.0000 01.0000 000500 001000 DUAL COUNTER FACTORY SETTINGS* Description Personality selected as COUNTER/RATE Reset Rate (A) Output(s) & Counter (B) Count with Inhibit Single edge counting (B) Counter B Scale multiplier of 1.
OPERATOR ACCESSIBLE FUNCTIONS WITH PROGRAMMING DISABLED 6. PRESET, SCALE FACTOR AND COUNTER LOAD PROGRAMMING, AND RESET ENABLED - The entire front panel is disabled with the exceptions of Preset, Scale Factor and Counter Load programmability. All functions can be interrogated. (For details on keyboard entry, see preceding section) One of the important features of the Gemini is the ability to disable programming.
DIAGNOSTICS, SELF-TEST, & “WATCHDOG” TIMER [Cont’d] OVERFLOW INDICATION Another error indicator is the “watchdog” timer. In order to insure the software is functioning properly, the program constantly monitors itself. If the proper sequence and timing of internal events does not occur, an “E” will appear on the left side of the display. If this occurs, refer to the “Troubleshooting Guide” for directions. The final type of built-in error checking is the front panel initiated self-test.
PROGRAMMING INSTRUCTIONS FOR THE COUNTER/RATE VERSION OF THE GEMINI 4000 CODE 42 - RESET BUTTON & TERMINAL ACTUATION MODES The first part of this section provides detailed descriptions of the function command codes for inputs response modes, reset modes, output terminations, etc. Then, using an actual application example, the programming instructions for a Counter/Rate version will be “walked through”, to give the user a full understanding of the Gemini programming procedure.
CODE 43 - INPUTS 1 & 2 RESPONSE MODES [Cont’d] [43 6] QUADRATURE TIMES 4 - This mode takes the quadrature mode, with two edge counting, one step further. In quadrature times 4, both Input 1 and Input 2 serve as the count or quadrature input, depending on their state. In one instance, Input 1 will serve as the count input and Input 2 will serve as the quadrature input. In another instance, Input 1 will be the quadrature input and Input 2 will be the count input.
CODE 45 - COUNTER (B) SCALE MULTIPLIER CODE 51 - OUTPUT ASSIGNMENT There are four Counter B Scale Multipliers that are available. They effectively divide the internal Count B value by 1, 10, 100, and 1000 respectively, to yield the displayed Counter B value. Note: Use of a small scale multiplier in conjunction with a small Scale Factor could cause the internal count value to be exceeded before the 6-digit display value is exceeded.
output again deactivates. When Output 1 is assigned to the counter and the Preset 1 value is changed, Output 1 will immediately go to the proper state. Upon power up, Output 1, if assigned to Counter B, will “remember” its power down boundary condition and go to that state. Output 1 is set for normal phase operation. CODE 52 - OUTPUT 1 TERMINATION MODES (Cont’d) [52 1] TERMINATE AT OUTPUT 2 START - Output 1 will terminate when Output 2 starts. Output 1 is set for normal phase operation.
negative than (only possible with counter) or equal to Preset 2, Output 2 is activated. If the count becomes more positive than the Preset 2 Value, the output again deactivates. When Output 2 is assigned to the counter and the Preset 2 value is changed, Output 2 will immediately go to the proper state. Upon power up, Output 2, if assigned to Counter B, will “remember” its power down boundary condition and go to that state. Output 2 is set for normal phase operation.
[56 3] AUTOMATIC RESET TO ZERO AFTER TIMED OUTPUT - The counter automatically resets to zero when Timed Output ends. Manual reset is “maintained” and will override automatic reset. The “Output Termination Mode” should be programmed for timed output operation, [54 5], when in this mode. CODE 56 - COUNTER (B) RESET MODES The Gemini 4000 has six different counter reset modes.
CODE 61 - RATE (A) RIGHT HAND DUMMY ZEROS CODE 64 - RATE SCALE MULTIPLIER Dummy zeros can be used to alleviate display fluctuations due to an unstable input signal. These zeros effectively move significant digits to the left. Therefore, a normal count of 1 could be shown as a 10, 100, or 1000. Using the dummy zeros will make it necessary to adjust the scaling if they were not considered before.
[66 -1] [66 -2] [66 -3] [66 -4] [66 -5] [66 -6] CODE 66 - “OPERATOR ACCESSIBLE FUNCTIONS” MODES The Gemini has six basic levels of “Operator Accessible Functions”. Each of these levels can be modified to enable or disable manual reset. When the “PGM. DIS.” (Program Disable) terminal is connected to “COMMON”, access to all functions is disabled except for those listed below which will remain enabled.
pulse information must be generated per measuring unit. For example, if 5 pulses are being received per foot of material, the precision of 10th of feet cannot be attained by simply programming a Scale Factor of 2.0000, even though the display is reading in 10ths. In this case, the display will increment by two for each count input. Thus if an odd Preset Value was entered, such as 6.7 ft., the Gemini will alter the preset to read in even tenths of feet.
DUAL PRESET COUNTER & RATE APPLICATION A wire screen manufacturer requires a cut to length system, and in addition, a prewarning of an overspeed condition. The cutting machine is equipped with an existing 12 tooth gear, driving a one foot circumference feed roller. The Gemini 4200’s counter is to read in feet. When 15,000 feet has been accumulated on the take up roll, the counter output is to turn on and deactivate the drive system.
STEP 9 - Enter code 54 (Output 2 Termination Modes). Select and enter mode 4 for Output 2 Terminate at Manual Reset. Note: The Timed Output 2 Value, code 55, is not used in this application. STEP 10 - Enter code 56 (Counter B Reset Modes). Select and enter mode 1 for manual reset to zero. STEP 11 - Enter code 61 (Rate Right Hand Dummy Zeros). Select and enter mode 4 for no right hand dummy zeros. STEP 12 - Enter code 62 (Rate Conversion Factor).
PROGRAMMING INSTRUCTIONS FOR THE DUAL COUNTER VERSION OF THE GEMINI 4000 CODE 42 - RESET BUTTON & TERMINAL ACTUATION MODES The first part of this section provides detailed descriptions of the function command codes for input response modes, reset modes, output terminations, etc. Then, using an actual application example, the programming instructions for the Dual Counter version will be “walked through”, to give the user a full understanding of the Gemini 4000 programming procedure.
[43 4] SEPARATE INPUT - In this mode, the two counters, A & B, are independently controlled by the inputs. Input 1 serves as the Counter A input and Input 2 serves as the Counter B input. CODE 44 - COUNTERS A & B NUMBER OF COUNT EDGES The counters of the Gemini can be programmed for either single or two edge (x2) counting. The number of count edges cannot be set when the count mode is programmed for quadrature x4 operation.
[51 1] OUTPUT 1 ASSIGNED TO COUNTER A, OUTPUT 2 ASSIGNED TO COUNTER B (Gemini 4200 Only) CODE 46 - COUNTER B DECIMAL POINT & LEADING ZERO BLANKING There are six basic modes of decimal point placement for Counter B of the Gemini. The decimal point is placed to the right of the display digit that corresponds to the mode identifier. (The right most decimal point, digit 1, is never turned on.) A “-” sign in front of the mode identifier will inhibit leading zero blanking.
[52 5] TERMINATE AFTER TIMED OUTPUT 1 - Once the output has been activated, it will deactivate after the predetermined length of time (code 53) has expired. Manual reset will override the timed output and reset Output 1. Output 1 is set for normal phase operation. CODE 54 - OUTPUT 2 TERMINATION MODES The Gemini 4200 has six “Output 2 Termination Modes”, which control the way Output 2 will terminate or reset. In all modes, Output 2 will terminate immediately when Counter B is manually reset.
CODE 54 - OUTPUT 2 TERMINATION MODES (Cont’d) CODE 56 - COUNTER B RESET MODES [54 6] BOUNDARY MODE - When in boundary mode the Preset 2 Value serves as the boundary point. When the Counter B Value is less than Preset 2, Output 2 is not activated (normal phase). When the Counter B Value is greater than or equal to Preset 2, Output 2 is activated. If the Counter B Value were to drop below Preset 2, Output 2 would then deactivate.
The activation and de-activation response time for reset is 10 msec. [56 5] AUTOMATIC RESET TO ZERO AT BEGINNING OF TIMED OUTPUT (AT PRESET) - In this reset mode, the counter will automatically reset to zero at the beginning of Timed Output (at Preset). The Timed Output Value must be shorter than the time required for the counter to count to the Preset 2 Value, otherwise, the Output will appear to be latched on. Manual reset is “maintained” and will override automatic reset.
CODE 64 - COUNTER A SCALE MULTIPLIER CODE 66 - “OPERATOR ACCESSIBLE FUNCTIONS” MODES There are four Counter A scale multipliers that are available. They effectively divide the internal Counter A Value by 1, 10, 100, and 1000 respectively, to yield the displayed Counter A Value. Note: Use of a small scale multiplier in conjunction with a small Scale Factor could cause the internal Counter A Value to be exceeded before the 6-digit display value is exceeded.
PRESET VALUES COUNTER LOAD VALUES Whenever the display value equals the preset value, an output action will occur. This action depends on the previously programmed modes. The preset values may vary from -999,999 to 999,999. (Refer to “Programming the Presets, Scale Factors, Timed Outputs & Counter Load Values” for instructions on entering the preset values.) The Scale Factor will have a direct effect on the preset value being entered.
DUAL COUNTER BATCHING APPLICATION A typical application for the Gemini 4200 will require a slow down output and a final cut output for cut. In this application the user also desires a total count of pieces cut per shift, or per order. The Gemini 4200 can easily be programmed to handle these requirements. A manufacturer of cardboard packaging inserts needs to cut various length cardboard inserts to a 32ndth of an inch tolerance.
STEP 12 - Enter code 64 (Counter A Scale Multiplier). Select and enter mode 1 for a scale multiplier of 1. STEP 13 - Enter code 65 (Counter A Decimal Point & Leading Zero Blanking). Select and enter mode 1 for no decimal point. STEP 14 - Enter code 66 (Operator Accessible Functions Modes). Select and enter mode 2 for Preset programming and reset enabled. When the “PGM.DIS.” terminal is connected to “COMM.”, the only changes that will be possible are resetting the unit and changing the Preset.
20 MA CURRENT LOOP COMMUNICATIONS FIG. 1: DATA FORMAT-10 BIT FRAME [300, 600, 1200, 2400 Baud] The Gemini 4000’s 20 mA Current Loop Communications Option allows a “two-way” serial communications link to be established in order to monitor the count, rate, Presets and Scale Factors from a remote location. Some typical devices that can be connected with the Gemini are: a printer, terminal, programmable controller, or host computer.
Below are some typical examples of properly constructed command strings. The command string is constructed by using the above commands and value identifiers along with the data values that are required. Data values may or may not contain the decimal point if a decimal point is programmed into the Gemini. The Gemini will accept the decimal points, however, it does not interpret them in any way. Leading zeros can be eliminated, however, all trailing zeros must be present. For example, if a Scale Factor of 1.
SENDING COMMANDS & DATA TO THE GEMINI (Cont’d) A typical transmission, with the “PR. ID” (Print ID) switch in the up position, is shown below. The timing diagrams show the timing considerations that need to be made. FIG. 2: TIMING FOR SENDING COMMANDS The first two digits transmitted are the unit address followed by two blank spaces. If the unit address is 0, the first locations will be left blank. The next three letters are the abbreviation for the mnemonic value followed by one blank space.
PRINT OPTIONS The various Print Options are used mainly in conjunction with a printer and the Print Request Terminal. They provide a choice of Gemini data values to be printed when either the Print Request Terminal is activated or the “Transmit per Print Options” (P) command is sent to the Gemini. The various Print Options available are: A. Print Display A count or rate value B. Print Display B Count Value C. Print Display A & B Values D. Print Preset 1 & 2 and Scale Factors A & B E.
“Print Request” terminal or after a few characters have been sent at the new baud rate (If the two previous conditions have not occurred, the Gemini will see the characters as erroneous and it will check the baud rate and set itself to operate at the new rate). PR.ID - PRINT ID. - When this switch is in the up position, the Gemini will print the unit address, data value ID and the data value when a transmission is requested.
COMMUNICATIONS APPLICATION PROCESS MONITORING SYSTEM Five Geminis with 20 mA Current Loop Option, are used to monitor and control parts packaging machines in a plant. The units are located at each of the machines in the production area of the building. The communications lines are run to an Industrial computer located in the production offices. The drawing below shows the Current Loop set-up. Each Gemini is given an address and the Serial DIP switches are set accordingly.
TROUBLESHOOTING GEMINI SERIAL COMMUNICATIONS SERIAL LOOP-BACK SELF-TEST If problems are encountered when trying to get the Gemini(s) and host device or printer to communicate, the following checklist can be used to help find the solution. The Gemini has a Serial Loop-back Self-test feature. This test enables the user to verify the operation of the Gemini when problems are encountered trying to get the Gemini and “Host device” communicating.
APPENDIX “A” - INSTALLATION & INPUT CONFIGURATION SWITCH SET-UP Installation Environment The unit should be installed in a location that does not exceed the maximum operating temperature and provides good air circulation. Placing the unit near devices that generate excessive heat should be avoided. The bezel should be cleaned only with a soft cloth and neutral soap product. Do NOT use solvents. Continuous exposure to direct sunlight may accelerate the aging process of the bezel.
SELECT AC POWER (115/230 VAC) Shield Termination EMC compliance installation testing had the drain wire for the shielded cable terminated as shown. The drain wire was less than 0.5" (12.7 mm) long. The AC power to the unit must be selected for either 115 VAC or 230 VAC. The selector switch is located through an access slot on the side of the case (See the Installation Figure on the previous page, or the label on the case). The unit is shipped from the factory with the switch in the 230 VAC position.
Install line filters on the power input cable to the unit to suppress power line interference. Install them near the power entry point of the enclosure. The following EMI suppression devices (or equivalent) are recommended: Ferrite Suppression Cores for signal and control cables: Fair-Rite # 0443167251 (RLC #FCOR0000) TDK # ZCAT3035-1330A Steward #28B2029-0A0 Line Filters for input power cables: Schaffner # FN610-1/07 (RLC #LFIL0000) Schaffner # FN670-1.
POWER WIRING RELAY WIRING AC Versions AC Power Wiring Primary AC power is connected to terminals 1 and 2, labeled AC. To reduce the chance of noise spikes entering the AC line and affecting the counter, an AC feed separate from that of the load should be used to power the counter. Be certain that the AC power to the counter is relatively “clean” and within the specified range.
INSTALLATION & REMOVAL OF THE RELAY BOARD NOTES: To install the relay board, locate the relay opening at the lower right-hand corner, on the back of the Gemini. Pull the tab down while sliding the board into the two slots in the housing. The relay board will seat into the unit, allowing the tab to return to its original position. To remove the relay board, pull down on the tab just enough to allow the relay board to slide out. Grasp the terminal block and pull to remove the board. 1.
CONNECTIONS & CONFIGURATION SWITCH SET-UPS FOR VARIOUS SENSOR OUTPUTS (See Note 5) -42-
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SENSOR INPUT CONNECTIONS & INPUT CONFIGURATION SWITCH SET-UP CHAN. B CHANNEL A The accompanying diagram shows the details of Input 1, Input 2, and Magnetic Pickup circuit. The schematic circuit for Input 2 is almost identical to that of Input 1, with the exception that Input 2 does not have the Magnetic Pickup circuitry paralleled with it. The four switches used to set up Input 1 and the Magnetic Pickup are designated S1, S2, S3, and S4. To set up Input 2, use switches S5, S6, and S7.
APPENDIX “B” - SPECIFICATIONS & DIMENSIONS Hi Bias - Input trigger levels VIL = 5.5 V, VIH = 7.5 V Note: Bias levels given are ±10% @ 12 VDC. They vary proportionally with sensor supply voltage at “DC OUT” terminal. 6. MAGNETIC PICKUP INPUT: Sensitivity: 150 mV peak (typical @ 12 VDC) Hysteresis: 100 mV Input impedance: 26.5 KΩ @ 60 Hz Maximum Input Voltage: ±50 Vp 7. RATE ACCURACY AND REPEATABILITY: +0.012% 8. RATE MINIMUM INPUT FREQUENCY: 0.03 Hz Note: At frequencies below 0.03 Hz (1 pulse every 32 sec.
ELECTROMAGNETIC COMPATIBILITY: Immunity to EN 50082-2 EN 61000-4-2 Level 2; 4 Kv contact 1 Electrostatic discharge Level 3; 8 Kv air Electromagnetic RF fields EN 61000-4-3 Level 3; 10 V/m 80 MHz - 1 GHz Fast transients (burst) EN 61000-4-4 Level 4; 2 Kv I/O Level 3; 2 Kv power 2 RF conducted interference EN 61000-4-6 Level 3; 10 V/rms 150 KHz - 80 MHz Power frequency magnetic fields EN 61000-4-8 Level 4; 30 A/m Emissions to EN 50081-2 RF interference EN 55011 Enclosure class A Power mains class A Notes: 1.
APPENDIX “C” - TROUBLESHOOTING GUIDE The majority of difficulties arising with the Gemini are related to incorrect hook-up and programming set-up. Always check all connections, function codes, Scale Factors, and preset as a first step in troubleshooting. Before applying power, double check all wiring. Improper AC voltage or AC connections may result in permanent damage to the unit.
APPENDIX “C” - TROUBLESHOOTING GUIDE (Cont’d) PROBLEM POSSIBLE CAUSE REMEDIES 1. Input type incorrectly selected. 2. Inputs incorrectly connected or loose connections. 3. Electrical interference. 4. Wrong counting mode. 5. Scale factor incorrect. 1. Check rear panel DIP switches. Turn on LO FRQ. switch for count speed of less than 100 cps. 2. Check sensors/input connections. 3. Check connections and wiring for noise sources. 4. Verify functions and modes. 5. Change scale factor value.
APPENDIX “D” - GEMINI COUNTER/RATE MODE FUNCTION COMMAND CODE SUMMARY CODE 41 MODE DESCRIPTION COMMENTS UNIT PERSONALITY (-)Loads factory set code values* +/-1 Counter/Rate* Rate Display → value (A)/Counter → Display value (B) 42 RESET BUTTON & TERMINAL ACTUATION MODES 1 Reset Rate Output For Rate, reset only affects the output and does not 2 Reset Counter change the displayed value.
APPENDIX “D” - GEMINI COUNTER/RATE MODE FUNCTION COMMAND CODE SUMMARY CODE 51 52 53 54 55 56 MODE +/-1 +/-2 +/-3 +/-1 +/-2 +/-3 +/-4 +/-5 +/-6 +/-1 +/-2 +/-3 +/-4 +/-5 +/-6 DESCRIPTION OUTPUT ASSIGNMENT (+) Preset Tracking Disabled (-) Preset Tracking Enabled Output 1 to Rate A, Output 2 to Counter B Outputs 1 & 2 to Counter B Outputs 1 & 2 to Rate A OUTPUT 1 TERMINATION MODES (+) Normal Phase (-) Reverse Phase* Terminate at Output 2 Start (Gemini 4200 only) Terminate at Output 2 End (Gemini 4200 on
APPENDIX “D” - GEMINI COUNTER/RATE MODE FUNCTION COMMAND CODE SUMMARY CODE 56 MODE +/-1 DESCRIPTION COUNTER RESET MODES (Cont’d) Manual Reset to Zero COMMENTS Automatically selected when outputs are configured for rate [51 3] or when boundary mode is used [54 6]. +/-2 +/-3 +/-4 +/-5 +/-6 Manual Reset to Preset** Automatically Reset to Zero after Timed Output** Automatically Reset to Preset after Timed Output** Automatically Reset to Zero at Preset** Counter resets as soon as Output is activated.
APPENDIX “D” - GEMINI COUNTER/RATE MODE FUNCTION COMMAND CODE SUMMARY CODE 64 65 66 MODE 5 6 +/-1 +/-2 +/-3 +/-4 +/-5 +/-6 DESCRIPTION RATE SCALE MULTIPLIER (Cont’d) 0.1 0.
APPENDIX “D” - GEMINI DUAL COUNTER MODE FUNCTION COMMAND CODE SUMMARY CODE 41 MODE DESCRIPTION COMMENTS UNIT PERSONALITY (-)Loads factory set code values* +/-2 Dual Counter* Counter A→Display value (A)/Counter B→Display value (B) 42 RESET BUTTON & TERMINAL ACTUATION MODES 1 Reset Counter A Reset affects the outputs as well as the displayed value. 2 Reset Counter B 3 Reset Counter A & B 43 INPUTS 1 & 2 RESPONSE MODES 1 Count With Inhibit Input 1 = Cnt A & Cnt B, Input 2 = Inh.
APPENDIX “D” - GEMINI DUAL COUNTER MODE FUNCTION COMMAND CODE SUMMARY CODE 51 52 53 54 55 56 MODE +/-1 +/-2 +/-1 +/-2 +/-3 +/-4 +/-5 +/-6 +/-1 +/-2 +/-3 +/-4 +/-5 +/-6 DESCRIPTION OUTPUT ASSIGNMENT (+) Preset Tracking Disabled (-) Preset Tracking Enabled* Output 1 to Counter A, Output 2 to Counter B Outputs 1 & 2 to Counter B OUTPUT 1 TERMINATION MODES (+) Normal Phase (-) Reverse Phase* Terminate at Output 2 Start (Gemini 4200 only) Terminate at Output 2 End (Gemini 4200 only) Terminate at Manual R
APPENDIX “D” - GEMINI DUAL COUNTER MODE FUNCTION COMMAND CODE SUMMARY CODE 56 61 MODE +/-1 +/-2 +/-3 +/-4 +/-5 +/-6 DESCRIPTION COUNTER B RESET MODES (Cont’d) Manual Reset to Zero Manual Reset to Preset** Automatically Reset to Zero after Timed Output** Automatically Reset to Preset after Timed Output** Automatically Reset to Zero at Preset** Automatically Reset to Preset at Zero** COUNTER A RESET MODES (+) Maintained (-) Momentary* +/-1 +/-2 +/-3 +/-4 +/-5 +/-6 COMMENTS Automatically selected when bou
APPENDIX “D” - GEMINI DUAL COUNTER MODE FUNCTION COMMAND CODE SUMMARY CODE 65 66 MODE +/-1 +/-2 +/-3 +/-4 +/-5 +/-6 DESCRIPTION CNTR A DECIMAL POINT & LEAD ZERO BLANKING (+) Leading Zero Blanking Enabled (-) Leading Zero Blanking Disabled* No Decimal Point Decimal Point Right of Digit 2 Decimal Point Right of Digit 3 Decimal Point Right of Digit 4 Decimal Point Right of Digit 5 Decimal Point Right of Digit 6 “OPERATOR ACCESSIBLE FUNCTIONS” MODES (+) Reset Button & “RST” Terminal Enabled (-) Reset Button
APPENDIX “E” - SCALING FOR COUNTING The Gemini is factory set to provide 1 count on the display for each pulse that is input to the unit. In many applications, there will not be a one to one correspondence between input pulses and display units. In these applications it will be necessary for the Gemini to scale or multiply the input pulses by a scaling factor to achieve the proper display units (feet, meters, gallons, widgets, etc.).
Once the Number of Count Edges (NCE) to be used has been determined, the Remaining Scaling factor required, “KR”, can be calculated. This is simply the Total Scaling Factor, “KT”, divided by the Number of Count edges. FORMULA #2: KR = KT/NCE WHERE: KR - Remaining Scaling required In our original example, the Total Scaling Factor, “KT” was determined to be 0.041667. Since this value is less than one, sufficient pulse information is being generated, i.e., there is enough resolution for the units selected.
In order to convert the pulse units to revolutions, it is necessary for the Gemini to multiply the number of pulses by a scaling factor to convert the pulse units to revolution units. The Gemini has two programming codes that serve to scale pulse units to desired display units. They are: the Scale Factor and the Scale Multiplier. Both are used to attain the Total Scaling Factor, “KT”. To calculate the Total Scaling Factor, “KT”, for the application, the following formula is used.
KT = Display Units/Number of Pulses KT = 20/60 = 0.333333 rules stated above, a Scale Multiplier Value of 0.01 is chosen and the Scale Factor is calculated as shown below. This will provide maximum amount of conversion accuracy possible. SF = KT/SCM SF = 0.020833/SCM SF = 0.020833/0.01 = 2.0833 In situations where the Total Scale Factor is already in range of the Scale Factor (0.0001 to 5.
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APPENDIX “I” - ORDERING INFORMATION PART NUMBERS 115/230 VAC No GEM41060 GEM41 Gemini 4100 Yes GEM41160 No GEM42060 GEM42 Gemini 4200 Yes GEM42160 Gemini 4100 Relay Board RLYBD001 Gemini 4200 Relay Board RLYBD002 For Information on Pricing, Enclosures & Panel Mount Kits, refer to the RLC Catalog or contact your local RLC distributor. MODEL NO.
GEM4COV-L.QXD 9/22/2006 3:39 PM Page 3 (1,1) LIMITED WARRANTY The Company warrants the products it manufactures against defects in materials and workmanship for a period limited to two years from the date of shipment, provided the products have been stored, handled, installed, and used under proper conditions. The Company’s liability under this limited warranty shall extend only to the repair or replacement of a defective product, at The Company’s option.
GEM4COV-L.QXD 9/22/2006 3:39 PM Page 4 (1,1) GEM4 / IM - L 8/06 DRAWING NO.
