MODEL L-1200 SERIES OPERATION MANUAL Built-in
Contents
1. aooeee Firmware Version and Revision e SZ SETTINGS lt lt lt v e View Only T oar Lit e al SETTING DISPLAYED View Only im ri 7 SEGMENT DISPLAY Model letter and firmware version on one screen and firmware revision on the other screen LI LI DEFAULT SETTING Not Applicable EVKAMPLE Model L firmware version 34 revision 00 Model L 1200 Series Operation Manual 03 25 05 Page 17 of 29 5 2 Normal Mode Display Screens BARGRAPH DISPLAY OFF 7 SEGMENT DISPLAY Three Dashes BN AA PULSE or PRESENCE indicating detection mode of the detector e DETECTLED OFF DETECTOR OUTPUT OFF PRESENCE Exaupr The detector is idle and in the presence mode of detection Mores This is the normal state for the display when the loop detection zone is unoccupied and the detector does not have any timing options set WMT TTT STATE Presence Call BARGRAPH DISPLAY Number of sensitivity levels that the inductance change caused by the vehicle IT IT exceeds the detection threshold first dot current sensitivity level second dot L J next lower sensitivity level etc el 7 SEGMENT DisPLay Call TEXN notes PRESENCE indicating detection mode of the detector PRESENCE DETECT LED Solid ON DETECTOR OUTPUT ON 1 EXAMPLE E The detection zone is occupied b2. ccccescceseesseesseeseeeseeseeeeceseenseceaecnaeceaecaaecseecaeessessaeseesseeeseseeeseeeneaecnsecneeeaeeeneeags 28 Model L 1200 Series Operation Manual 03 25 05 Page 3 of 29 This page intentionally left blank Model L 1200 Series Operation Manual 03 25 05 Page 4 of 29 1 0 GENERAL DESCRIPTION This Operation Manual was written for people installing operating and maintaining Reno A amp E Model L 1200 Series inductive loop vehicle detectors The Model L 1200 is a single channel shelf mount type inductive loop vehicle detector designed to meet or exceed NEMA Standards TS 1 1989 The Model L 1200 incorporates a microcontroller that monitors and processes signals from the loop lead in circuit and Phase Green Input The microcontroller uses these inputs to determine how to control the detector outputs A Liquid Crystal Display LCD a light emitting diode LEDs and three front panel pushbuttons are used to display and program all detector functions Several diagnostic modes are available to aid technicians and service personnel in troubleshooting detection problems The use of a LCD is what distinguishes this detector from that of other manufacturers It allows more information never before available to be displayed to the user during normal operation of the detector The LCD makes it easy to view and adjust all programmable detector options and settings It is no longer necessary to check or change detector settings with DIP switche
3. The detect LED operates normally indicating call no call delay extension DELAY PULSE and or pending as expected EOG SCANNING DETECTOR OUTPUT The detector output operates normally OPTION ON OFF LOOP FAIL EXAMPLE E All segments on HBR YJ 0 This display is visible whenever two or three pushbutton switches are pressed at the same time Model L 1200 Series Operation Manual 03 25 05 Page 20 of 29 5 3 Loop Fail Indications If the total inductance of the loop input network goes out of the range specified for the detector or rapidly changes by more than 25 the detector will enter the Fail Safe mode and LOOP FAIL will be displayed on the LCD The type of loop failure will also be displayed as L lo for 25 change or shorted loop conditions or L hi for 25 change or open loop conditions This will continue as long as the loop fault exists Fail Safe mode generates a continuous call in Presence Mode and in Pulse Mode At the time of a loop failure the detect LED will begin to flash at a rate of three flashes LOOP FAIL LOOP FAIL per second The LED will continue this display pattern until the detector is manually 1 reset or power is removed T oO 25 change 25 change or or If the loop self heals the LOOP FAIL message on the LCD will extinguish and the open loop shortedloop detector will resume operation in a normal manner except
4. Model L 1200 Series Operation Manual 03 25 05 Page 27 of 29 8 6 Troubleshooting Delay Problems Does the detector ever time the Delay function NO Is the Phase Green Input connected to a point that will be at 89 VAC to 135 VAC when the green associated with this detector is on SE NO Connect the Phase Green Input to an appropriate point YES Disconnect the Phase Green Input from the phase green and leave it disconnected Does the Delay function now time NO Replace the detector and ensure that there is delay time programmed Does the new detector time the Delay function correctly NO The problem is in the wiring from the phase green to the wiring harness or the connector itself The Phase Green Input lead is shorted to ground somewhere YES The detector has a bad Phase Green Input circuit YES The point you are using to get phase green is always at a high potential greater than 89 VAC or the phase actually is green all of the time YES Remember that the delay function is only available when the Phase Green Input is below 89 VAC If you want the delay function available all of the time disconnect the Phase Green Input If you are aware of this and the delay function still does not function at the correct times then the Phase Green Input is connected to the wrong phase green Connect the Phase Green Input to an appropriate point 8 7 Things To Know About Loops Always use a wire with cross linked Polyethylene insulation i
5. 32 MHz Vs Oscillator Input Power Voltage Geet Supply TE 5 VDC GND Model L 1200 Series Operation Manual 03 25 05 Page 23 of 29 7 0 THEORY OF OPERATION The Reno A amp E Model L 1200 detector digitally measures changes in the resonant frequency of the loop circuit to determine if a vehicle has entered the detection zone The Model L 1200 Series detector applies an excitation voltage to the loop circuit resulting in the loop oscillating at its resonant frequency The current flow in the loop wire creates magnetic fields around the loop wire When a vehicle passes over the loop area the conductive metal of the vehicle causes a loading of the loop s magnetic fields The loading decreases the loop inductance which causes the resonant frequency to increase By continuously sampling the loop s resonant frequency the magnitude and rate of change can be determined If the frequency change exceeds a selectable threshold set by the sensitivity settings the detector will activate an output signal If the rate of change is slow typical of environmental drift the detector will continuously track and compensate for the change The Model L 1200 detector also monitors the loop frequency for out of range conditions such as an open or shorted loop circuit The detector s oscillator circuit supplies an excitation voltage that is coupled to the loop circuit by a loop isolation transformer The transformer provides high common mode isolation between th
6. Option 6 1 will always be in the OFF state when first viewed The accumulated vehicle count is also cleared by loss of power 2 14 Option 7 Vehicle Counting Loop Configuration This feature is only available on the True Count version of the Model L 1200 detector L 1201 The detector s Vehicle Counting Loop Configuration setting can be set from 01 to 04 This setting should indicate the number of loops installed in a single lane The setting 01 would indicate a single loop This could be a single 6 x 6 or a long loop such as a 6 x 50 Quadrupole The remaining three settings indicate the number of 6 x 6 loops installed in a single lane of traffic Several factors can influence the accuracy achieved with this detector 1 Lanes per Detector The detector was designed to be used in applications where it is used to count vehicles in a single lane of traffic It is not intended to be used in applications where it is necessary to count cars across multiple lanes of traffic 2 Loop Geometry In the multiple loop settings 02 04 all loops must be of the same configuration i e the same number of turns and the same size Also all loops must be equally spaced The ideal spacing for 6 ft by 6 ft loops is 15 ft center to center or 9 ft spacing between loop edges Further multiple loops should always be wired in a series network This is important to ensure that a vehicle passing over the group of loops causes the same amo
7. ie 1 The Bargraph is a window that adjusts to the sensitivity setting y EA NIE I I I q m ai am wm PRESENCE Yo of Inductance 0 0025 0 005 0 01 0 02 0 04 0 08 0 16 0 32 64 1 28 2 56 5 12 SENSITIVITY 9 8 7 6 5 4 3 2 1 1 Model L 1200 Series Operation Manual 03 25 05 Page 21 of 29 5 5 5 6 5 7 Model L 1200 Series Operation Manual 03 25 05 Setting Sensitivity for Motorcycle Detection using the Bargraph The bargraph can also be used to select the proper sensitivity level for small motorcycle detection The relative change of inductance caused by a motorcycle and a single automobile are proportional on any loop configuration Selecting the sensitivity level that causes the bargraph to display the seventh segment for a single standard automobile automatically sets the sensitivity to detect small motorcycles Follow the steps below T DI LH PRESENCE Step 1 Observe a single standard auto mobile in the loop zone Note the number of segments displayed on the bargraph 4 SENSITIVITY Step 2 Go to the Program mode Note the sensitivity level 3 C L SENSITIVITY Step 3 actual Subtract the number of segments displayed from the desired number of 7 7 4 3 Increase the sensitivity UI JUA q PRESENCE Step 4 Verify that a single standard auto mobile caus
8. the LED will continue the conditions conditions S i three flashes per second display pattern thus providing an alert that a prior Loop Fail condition has occurred Each loop failure is counted and accumulated into the Loop Fail Memory The total number of loop failures for the detector is written into the Loop Fail Memory since the last power interruption or manual reset and can be seen by stepping through the functions in Program Mode to the LOOP FAIL display This is a useful tool to identify intermittent loop problems If the count is extremely high for the period of time observed the problem is very likely a loose connection check for loose connections at the terminal strip and bad splices in the field The Loop Fail Count is reset when power is removed from the detector This prevents the Loop Failure Count from moving to another loop if the detector is moved to a new location To view the Loop Fail Count repeatedly press the FUNC button until the LOOP FAIL display is shown The Loop Fail Count display is after the OPTION displays Pressing the A UP or V DOWN button while the Loop Fail Count is displayed will reset the count to zero NOTE The Loop Fail Count is not reset when the setting of Option 4 Noise Filter Disable is changed or when the detector s sensitivity or frequency is changed The prior Loop Fail indication will continue until the Loop Fail Count is reset to zero 5 4 Setting Sensitivity using the Bargrap
9. 6 INE e EE 10 e E ee EE 10 34 TABLE Sensitivity AL L amp Response Tumes imwe 11 3 5 TABLE Default RE 11 3 6 TABLES Pin Assignments ENEE dE NEEN 12 40 USER INTERFACE einir ienn C EEE A Ee E N EEN N EEEE EEN N N e TEN a 13 SI INSTA AT ON AAD N P ali II ka ni wa E AA tee 14 5 1 Program Mode Display Bcreens amwe wimi maimamu 14 5 2 Normal Mode Display Screens ceccesscessceseeeeceseceseeesecececseecseeeseeeaeseeesecesecseceaeeaecsaecaecaecaeeeseseeeeneeeereeeees 18 5 3 Loop Fail EATS ETe AA E E S A E E EE 21 5 4 Setting Sensitivity using the Bargranb wimm niwaweke ameuwawa 21 5 5 Setting Sensitivity for Motorcycle Detection using the Bargraph wwwmwmmwwwwmmmwemum www mawaa 22 5 6 Full Restore To Factory Default Setngs amwamini 22 Suh Display Test sre ee EELER 22 6 0 BLOCK DIAGRAM veirie tci LEN i Ees aTe iE EEEN EEES AAEN EEE eS SENET EEES EEEE AKTES ANTE TEES EEEN 23 KAISER ISL EIER HERE 24 8 0 MAINTENANCE AND TROUBLESHOOTING www soil kansa tis wee watia tondu samia ma inaishia misa na ami kaishia ASSENS an saaa 25 8 1 Troubleshooting Power Problems uw nim wew awawie wawa wa 25 8 2 Troubleshooting Initialization Droblems amwamini mkiamua 25 8 3 Troubleshooting Loop Fail Problems mwituni wawa waa 26 8 4 Troubleshooting Intermittent Loop Fail Droblems aim 27 8 5 Troubleshooting Intermittent Detector Lock Ups 27 8 6 Troubleshooting Delay Droblems amkeni mwema 28 8 7 Things To Know About Loops 0
10. L 1200 PARAMETER v lt Option 6 1 Reset Vehicle Count SETTINGS s e eeeeeeeeee ON or OFF SETTING DISPLAYED The word ON or OFF will be displayed 7 SEGMENT DisPLay The number of this option DEFAULT SETTING OFF EXAMPLE E Option 6 1 is turned OFF NOTES vwoee This option is only visible on the L 1201 versions of the L 1200 PARAMETER lt Option 7 Number of Loops SETTINGS lt lt 7 01 through 7 05 SETTING DISPLAYED 7 segment display will show currently selected setting 7 SEGMENT DisPLay The number of this option DEFAULT SETTING 7 04 EXAMPLE vv The number of loops is set to 4 Nope This option is only visible on the L 1201 versions of the L 1200 PARAMETER lt c Option 11 Audible Detect SETTINGS lt ON or OFF SETTING DISPLAYED The word ON or OFF will be displayed 7 SEGMENT DisPLay The number of this option DEFAULT SETTING OFF EXAMPLE E Option 11 is turned ON Nope This option will automatically turn OFF 15 minutes after being activated or on loss of power Model L 1200 Series Operation Manual 03 25 05 Page 16 of 29 OPTION ON 1 ro OPTION OFF l C1 Ed e UU LOOP FAIL PARAMETER lt c Option 12 0 Detector Disconnect SETTINGS cece ON or OFF SETTING
11. NO This is typically caused by having too many turns in a large loop Replace the loop with one that has an inductance of less than 2000 microhenries YES If possible connecting each loop to its own detector is preferred Or try a parallel wiring arrangement for the loops if separate detector is not possible Model L 1200 Series Operation Manual 03 25 05 Page 26 of 29 8 4 Troubleshooting Intermittent Loop Fail Problems Have you been able to see the detector display while the loop failure was occurring NO Loop Fail problems tend to be bad splices in the loop lead in circuit shorts in the loop lead in circuit shorts to earth ground in the loop lead in circuit or loose connections or bad solder joints in the signal cabinet If you have any splices that are not soldered and sealed with an adhesive heat shrink or epoxy resin replace the splice with one that is Using a MegOhm meter measure the resistance from one of the loop wires to earth ground It should be greater than 50 megOhms Inspect the loop Look for exposed wires or debris pressed into the saw cut Tighten all screw terminals in the signal cabinet that the loop circuit uses Check solder joints in the loop circuit especially on the harness itself Disconnect and reconnect any connector used in the loop circuit and check for loose pins and sockets in these connectors If your cabinet has lightning or surge suppression devices on the loop inputs in the cabinet remove or replace t
12. a high sensitivity setting When Option 5 is not enabled OFF normal loop compensation is used Model L 1200 Series Operation Manual 03 25 05 Page 7 of 29 2 13 Option 6 Vehicle Counting Display Option 6 has two parameters Option 6 0 and Option 6 1 When Option 6 0 is enabled ON the normal operating display is replaced with the accumulated vehicle count The unit is capable of accumulating 65 535 vehicle counts before rolling over to zero The display will show the hundreds tens and ones digits until the accumulated count exceeds 999 At this point the display will alternate between the ten thousands and thousands digits and the remaining three digits for hundreds tens and ones When the detector is first powered up the detector enters a training mode Operation in the training mode is indicated by the accumulated vehicle count flashing on the LCD Training mode enables the detector to identify what degree of inductance change a typical vehicle causes as it is detected When the training period is complete the flashing display of the accumulated vehicle count on the LCD will cease and the LCD will show the actual accumulated vehicle count The most accurate vehicle counts are obtained once the detector is operating in this mode i e after the training period is complete Option 6 1 is used to reset the accumulated vehicle count When Option 6 1 is changed from the OFF state to the ON state the accumulated vehicle count is reset to zero
13. delay extension and or pending as expected DETECTOR OUTPUT The detector output operates normally CJ oo e l EXAMPLE w lt e Percentage change of inductance of the call is 0 087 S Morts This display is only visible while the detector is detecting a vehicle and not timing any functions ee Accumulated Vehicle Count Display Option 6 0 ON amp WwW OFF if no vehicle is detected Number of sensitivity levels that the inductance change caused by the vehicle exceeds the detection threshold first dot current sensitivity level second dot next lower sensitivity level etc if a vehicle is detected Alternates between upper two digits and the lower three digits If the upper two digits are zero they are not displayed at all and only the lower three digits will be displayed None The detect LED operates normally indicating call no call delay extension and or pending as expected DETECTOR OUTPUT The detector output operates normally EXAMPLE oosa eeoeeeoe The accumulated vehicle count is 21 187 Nope This display will flash while the detector is in the training mode This display is only visible on the L 1201 version of the L 1200 IL see Grat LCD Test ae REQ BARGRAPH DISPLAY All segments on 7 SEGMENT DispLay All segments on LILILI LC EE All segments on SEconDs e DETECTLED
14. has not been turned off Is there a loop connected to the detector Se NO Change the sensitivity setting to OFF and the Loop Fail message will no longer be displayed YES There is an open or high resistance in the loop lead in circuit Short across the loop inputs on the terminal block in the cabinet Does the status now show L lo Loop Fail NO The problem is in the cabinet Replace the detector with a known good unit Does the status now show L lo Loop Fail with the short still applied at the loop terminals NO The detector is not the problem Measure the resistance from each loop terminal to the pin in the connector It should read less than 0 5 Ohms for both terminals Check all wiring from terminal block to the connector in the harness Also check that the connector itself is not defective YES The replaced unit was defective YES The open or high resistance is in the field With the loop still disconnected measure the resistance of the loop lead in circuit from one lead of the loop to the other Is the resistance below five Ohms NO Measure the resistance as close as possible to where the loop enters the pavement Is the resistance below two Ohms nae NO The loop is probably damaged Replace the loop YES The lead in cable is defective Check all splices Replace the lead in cable if necessary YES The problem is probably excessive inductance Are there several loops connected in series for the loop lead in circuit
15. inductance change caused by the vehicle A A A exceeds the detection threshold first dot current sensitivity level second dot LI LI LI next lower sensitivity level etc SECONDS el 7 SEGMENT DISPLAY 000 Showing that the Max Presence timer has timed out TEXT EE SECONDS MAX PRESENCE and EOG EOG will be flashing Poa ESENCE DETECT LED Solid ON DETECTOR OUTPUT ON 1 EXAMPLE lt lt lt The detection zone is occupied by a vehicle that exceeds the detection threshold by five 5 sensitivity levels Max Presence has timed out and is waiting for the End Of Green and detector is outputting a call MMMM Wim STATE Pending BARGRAPH DISPLAY Number of sensitivity levels that the inductance change caused by the vehicle E Kg d exceeds the detection threshold first dot current sensitivity level second dot LI next lower sensitivity level etc el 7 SEGMENT Dep Ay Pnd TEXT erter PULSE or PRESENCE indicating detection mode of the detector PRESENCE DETECT LED 3 3 Hz flash rate with 83 duty cycle 250 ms ON 25 ms OFF DETECTOR OUTPUT OFF S EXAMPLE oseo The detection zone is occupied by a vehicle that exceeds the detection threshold by seven 7 sensitivity levels and the detector is not outputting a call Option 12 Detector Disconnect has been selected Mores The Pending state is used when the detector would normally output a call but i
16. of power 2 9 Option 2 Loop Inductance AL L Display The detector s Loop Inductance AL L Display setting can be toggled ON or OFF by momentarily pressing either the A UP or V DOWN button When this option is enabled ON the LCD displays the percentage of inductance change AL L value during the Call state To facilitate the viewing of the maximum amount of change in the AL L value while traffic is in motion over the detection zone the detector holds the peak AL L value for a period of two seconds NOTE This option is automatically disabled 15 minutes after activation or on loss of power 2 10 Option 3 Call Extension Control The detector s Call Extension Control setting can be toggled ON or OFF by momentarily pressing either the A UP or V DOWN button When this option is enabled ON the detector will extend calls for the programmed extension time only when the Phase Green Input signal pin J of the MS connector is active When this option is OFF the detector extends ALL calls for the programmed extension time The signal on pin J of the MS connector is also called the Call Delay Override See Section 3 2 Phase Green Input specifications for voltage levels 2 11 Option 4 Noise Filter Disable The detector s Noise Filter Disable setting can be toggled ON or OFF by momentarily pressing either the A UP or V DOWN button When Option 4 is enabled ON internal noise filtering is disabled thus providing a faster respo
17. phase The expected installation is a stop bar loop typically a 20 to 30 long detection zone and an advance detection loop typically a 6 long detection zone for a single traffic lane This feature provides a means for keeping the stop bar loop from placing calls to the traffic controller after the stop bar loop has served its intended purpose during the beginning period of the associated green phase The detector connected to the stop bar loop would have the Detector Disconnect feature turned ON and have a programmed extension time that functions as the disconnect time The detector connected to the advance detection loop would be programmed as normal SES e A e Seconds 0 5 10 15 20 25 30 35 40 45 50 55 This example assumes an extension time of 2 seconds The dotted lines show where disconnect would occur Phase Green is the state of the light actual Phase Green Input is inverted When the Detector Disconnect feature is turned ON and the signal is not green the detector outputs calls to the traffic controller as usual When the signal turns green vehicles begin to move and eventually the stop bar detection zone is cleared At the time that the stop bar detection zone is cleared the disconnect timer begins to count down If another vehicle enters the stop bar detection zone befo
18. this training period could take many hours We recommend installing the detector the day before actual vehicle counts are to be collected This will allow sufficient time for the detector to train itself The training period is necessary to ensure that the detector can adjust itself to the exact particulars of a given loop installation The vehicle counting feature cannot be turned off and is active regardless of any other features that have been enabled Even if other features Delay Third Car Passage Directional Logic or Detector Disconnect would cause the normal detector output to be in the No Call state the vehicle counting feature will still operate correctly 2 15 Option 11 Audible Detect Signal The detector s Audible Detect Signal setting can be toggled ON or OFF by momentarily pressing either the A UP or V DOWN button When this option is enabled ON an audible signal will be activated whenever the detection zone is occupied The audible signal indicates actual occupancy of the loop detection zone Timing and Model L 1200 Series Operation Manual 03 25 05 Page 8 of 29 2 16 3 0 3 1 disconnect functions have no effect on the audible signal This feature allows a technician to watch the detection zone on the street and confirm correct detector operation without having to look at the detector display as well NOTE This option is automatically disabled 15 minutes after activation or on loss of power Option 12 Detector Disc
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20. DISPLAYED The word ON or OFF will be displayed 7 SEGMENT DisPLay The number of this option DEFAULT SETTING OFF EXAMPLE E Option 12 0 is turned ON Nope When this option is turned ON the value entered in Extension time is used as a Disconnect time Operation of this option requires that the Phase Green Input be correctly connected to the controller phase green circuitry PARAMETER lt c Option 12 1 Detector Disconnect Type SETTINGS cece ON or OFF SETTING DISPLAYED The word ON or OFF will be displayed 7 SEGMENT DisPLay The number of this option DEFAULT SETTING OFF EXAMPLE E Option 12 1 is turned OFF Nope When this option is turned ON the value entered in Extension time is used as a Disconnect time and no extension of the call is made When Option 12 1 is turned OFF Extension time is active Extension time and Disconnect time function concurrently PARAMETER v lt Loop Fail SETTINGS Pressing the A UP or V DOWN button will clear the Loop Fail memory SETTING DISPLAYED View only 7 SEGMENT DISPLAY Loop Failures since the last time it was cleared manually or due to power failure DEFAULT SETTING 0 EXAMPLE There are eight 8 Loop Failures in the accumulator NOTES Count will be reset to zero after loss of power by pressing the A UP or Y DOWN button or by resetting the detector Se PARAMETER
21. EGMENT DisPLAY Countdown of remaining Extension time in seconds L TENT EE SECONDS EXTENSION and PULSE or PRESENCE SECONDS el DETECTLED 16 6 Hz flash rate with 50 duty cycle 30 ms ON 30 ms OFF GENEE DETECTOR OUTPUT ON PRESENCE ExauptE The detection zone is vacant there are two and one half 2 5 seconds of Extension time remaining and detector is outputting a call 1 Nope When Option 12 0 is ON and 12 1 is OFF the Extension timer becomes the Disconnect timer Model L 1200 Series Operation Manual 03 25 05 Page 18 of 29 WWMM STATE Timing Max Presence is BARGRAPH DISPLAY Number of sensitivity levels that the inductance change caused by the vehicle A W A exceeds the detection threshold first dot current sensitivity level second dot 41 LI next lower sensitivity level etc SECONDS el 7 SEGMENT DISPLAY Countdown of remaining seconds of Max Presence TER ech ge ae SECONDS and MAX PRESENCE MAX PRESENCE DETECT LED Solid ON DETECTOR OUTPUT ON 1 EKAMPLE lt lt The detection zone is occupied by a vehicle that exceeds the detection threshold by five 5 sensitivity levels there are 30 seconds of Max Presence remaining and the detector is outputting a call bettel STATE Max Presence Timed Out and Waiting for End Of Green BARGRAPH DISPLAY Number of sensitivity levels that the
22. Model L 1200 Series Operation Manual 03 25 05 Page 15 of 29 OPTION 1 Lr OPTION ON 1 OPTION ON 1 cm OPTION wT LI OPTION OPTION ON 1 OFF OFF e al PARAMETER lt Option 4 Noise Filter Disable SETTINGS cece ON or OFF SETTING DISPLAYED The word ON or OFF will be displayed 7 SEGMENT DisPLay The number of this option DEFAULT SETTING OFF EXAMPLE E Option 4 is turned OFF Mores Changing the setting of this option will reset the detector It is recommended that this option be set to OFF for normal operation PARAMETER v lt v Option 5 Phase Green Loop Compensation SETTNGS cece ON or OFF SETTING DISPLAYED The word ON or OFF will be displayed 7 SEGMENT DisPLay The number of this option DEFAULT SETTING OFF EXAMPLE E Option 5 is turned ON Nope Operation of this option requires that the Phase Green Input be correctly connected to the controller phase green circuitry PARAMETER lt c Option 6 0 Display Vehicle Count SETTINGS cece ON or OFF SETTING DISPLAYED The word ON or OFF will be displayed 7 SEGMENT DispLay The number of this option DEFAULT SETTING OFF EXAMPLE E Option 6 0 is turned ON Morts This option is only visible on the L 1201 versions of the
23. NO The problem is in the cabinet Replace the detector with a known good unit Does the status now show L hi Loop Fail NO The detector is not the problem Measure the resistance from each loop terminal to the pin in the connector It should read less than 0 5 Ohms for both terminals Check all wiring from terminal block to the connector in the harness Also check that the connector itself is not defective YES The replaced unit was defective YES The problem is in the field either a short in the loop lead in circuit or insufficient inductance in the loop lead in circuit Leave the loop disconnected in the cabinet Connect a MegOhm meter set to 500 volts to one of the loop wires and earth ground Is the resistance greater than 50 megOhms NO There is leakage to earth ground in the loop lead in circuit Disconnect the loop from the lead in cable as close as possible to where the loop enters the pavement Measure the resistance between one of the loop wires and earth ground Is the resistance greater than 50 megOhms nad NO The loop is damaged Replace the loop YES The lead in cable is defective Replace lead in cable YES The problem is insufficient inductance in the loop lead in circuit This indicates too few turns in the loop itself or some of the turns are shorted to each other In either case the loop must be replaced to correct the problem YES If the detector is not being used you will see this display if the detector
24. Operation Manual 03 25 05 Page 14 of 29 PapauETER o e Extension SETTNGS 256 Selections 0 to 25 5 Seconds in 0 1 second steps L SETTING DISPLAYED 7 segment display will show the currently selected setting x 41 7 SEGMENT DISPLAY Currently selected Extension time in seconds Co Li SECONDS el DEFAULT SETTING 0 seconds Se EXAMPLE wswsese Extension of 2 5 seconds selected Mores This parameter will hold the Disconnect timer value if Option 12 0 is ON and extension will not be added to a vehicle call if Option 12 0 and 12 1 are ON PARAMETER s Max Presence Ges SETTINGS seese 1000 Selections 1 second to 999 seconds or OFF A 8 Z SETTING DISPLAYED 7 segment display will show currently selected setting LI J 7 SEGMENT DISPLAY Currently selected Max Presence time in seconds SECONDS el DEFAULT SETTING OFF Eat E Max Presence is turned OFF WEE RENCE NEES doves If the detection zone is occupied when this parameter is changed the change will not take effect until the detection zone is empty or the detector is reset BApAMETER o ae EOG End Of Green SETTNGS cece ON or OFF SETTING DISPLAYED The word ON or OFF will be displayed 7 SEGMENT DisPLay Blank el DEFAULT SETTING OFF Eat E EOG is turned ON EOG Nope This parameter is only displayed if the Max Presence setting has been S programmed with a
25. Reno A amp E ee Telephone 775 826 2020 4655 Aircenter Circle Facsimile 775 826 9191 Reno Nevada 89502 Bee Internet www renoae com USA d di e mail contact renoae com MODEL L 1200 SERIES OPERATION MANUAL Built in Loop Analyzer Single Channel Menu Driven Programmable Inductive Loop Vehicle Detector 3 25 05 Model L 1200 Series Operation Manual 03 25 05 Reno A amp E P N 551 1202 01 This page intentionally left blank Model L 1200 Series Operation Manual 03 25 05 Page 2 of 29 MODEL L 1200 SERIES OPERATION MANUAL TABLE OF CONTENTS V 0 GENERALADESGRIR TION ge eet Eegeregie eer WI aaa 5 2 0 GENERAL EE EN EEN 6 QV Loop FREQUENCY EE 6 GC ESINGEN 6 23 TE 6 DAY AD ee Bees eco ES 6 DS Call eege ee a ees ec EES 6 2 0 M x Presence Tee est i ei ee A cent as e eee ec SE 6 23 End Of Green BOG sir e EE N E E E E e fess vecdubacett cosh ttatswoeds E ededesnt een 7 23 Options Loopdnductance Display Ia 7 2 9 Option 2 Loop Inductance AL L Display waw 7 2 10 Oppen 3 Call Extension Control Ia 7 2 11 pekt Noise Filter Disabler estate REENEN 7 2 12 Option 5 Phase Green Loop Compensation amkeni niwa a 7 2 13 Option 6 Vehicle Counting Display 8 2 14 Option 7 Vehicle Counting Loop Confeuratnon wima 8 2 15 Option 11 Audible Detect Seng 8 2 16 Option 12 Detector Disconnects eege Seet EE eee tas ein UM RS 9 SE SPECIFICATIONS ss cesses en aAA ET MUA WAWA AKA EWE MWA AMEUTOA An 9 Sali Oe EE 9 DD
26. Stored parameters are only changed with the front panel switches and are unaffected by loss of power or detector reset The microcontroller continuously processes the loop samples and the detector operation is not affected during the operation of the switches or the LCD Note When either sensitivity or frequency is changed the detector is reset In addition the microcontroller conditions the outputs based on Phase Green Input and the programmed settings of the various timers Delay Extension and Max Presence and options EOG Option 3 Option 4 Option 5 and Option 12 Model L 1200 Series Operation Manual 03 25 05 Page 24 of 29 8 0 MAINTENANCE AND TROUBLESHOOTING The Reno A amp E Model L 1200 Detector requires no maintenance If you are having problems with your Model L 1200 detector use the troubleshooting chart below to help determine the cause of the problem No LCD display and LED not lit See Troubleshooting Power Problems LCD displays garbage and detector does not respond to button presses Detector does not respond to button presses See Troubleshooting Initialization Problems LCD continually displays L lo and Loop Fail or L hi and Loop Fail The detect LED is flashing three times per See Troubleshooting Initialization Problems See Troubleshooting Loop Fail Problems second and detector appears to be working See Troubleshooting Intermittent Loop Fail Problems correctly Detector intermitten
27. UTS SOLID STATE OUTPUTS A Power Neutral 120 240 24 VAC A Power Neutral 120 240 24 VAC B Output Relay Common B Output Emitter Source C Power Line 120 240 24 VAC C Power Line 120 240 24 VAC D Loop Input D Loop Input E Loop Input E Loop Input Output Collector Drain E Output Relay Normally Open F Model 1200 SSTX No Connection No Connection Output Relay Normally Closed Model 1200 SSTX G Model 1201 True Count G No Connection Output Relay Normally Open Model 1201 True Count Output Collector Drain H Chassis Ground H Chassis Ground No Connection No Connection Model 1200 SSTX I Model 1201 True Count I Output Collector Drain Output Relay Common Model 1201 True Count Output Emitter Source J Phase Green Input Delay Override J Phase Green Input Delay Override NOTE Relay contact states are shown with power applied loop s connected and no vehicle s present Model L 1200 Series Operation Manual 03 25 05 Page 12 of 29 4 0 USER INTERFACE Bargraph DETECT LED e Vehicle Signal Strength MODEL L e Call e Frequency Setting Delay Time in Progress RENO N Extension Time in Progress Q ETECT Pending Call State OoOo Seven Segment Display EEEREN Loop Fault has Occurred Parameter Values TI Timer Countd HOH ee LUUT Function Select Pushbutton SECONDS e Press Momentarily to Enter nductance Value D E Program Mode and to Step AL L Value E Through Param
28. e Max Presence timer reaches zero the call is dropped and no automatic reset occurs If the End Of Green EOG function is not enabled OFF and the call is still present when the Max Presence timer reaches zero the detector then is automatically reset If the EOG function is enabled ON and the call is still present when the Max Presence timer reaches zero the detector enters a Wait state The Wait state continues until either the loop becomes vacant or the Phase Green Input signal pin J of the MS connector transitions from green to not green with the call Model L 1200 Series Operation Manual 03 25 05 Page 6 of 29 still present If the loop becomes vacant first the call is dropped and no automatic reset occurs If the Phase Green Input transitions from green to not green while the detector is in a Wait state the detector is automatically reset The signal on pin J of the MS connector is also called the Call Delay Override See Section 3 2 Phase Green Input specification for voltage levels 2 7 End Of Green EOG The detector s EOG setting can be toggled ON or OFF by momentarily pressing either the A UP or V DOWN button The EOG function is used to synchronize resetting of the detector with the termination of the associated phase green The assumption is that this is the safest point in time to reset the detector This assumption is based on the premise that at the termination of the associated phase green traffic should be moving and
29. e actual value being used Example If you are changing the delay time the time displayed at the instant that a vehicle entered the detection zone would be the value used for the delay timer Pressing the FUNC button enters the Program Mode The FUNC button has an auto repeat function This allows quick navigation to the desired parameter The FUNC button only moves forward through all of the parameters There is no way to move backwards through the parameters Pressing and holding the FUNC button for one second will exit the Program Mode and return to the Normal Mode Pressing and holding either the A UP or V DOWN button will cause the value to change rapidly until the button is released Program Mode Display Screens sw PARAMETER o s eese Frequency FRE KUZI gerunes Eight 8 Selections 1 to 8 1 E E SETTING DISPLAYED Bargraph indicates settings from 1 left to 8 right 41 I 7 SEGMENT DispLay Actual Frequency of the loop circuit Typically 20 0 to 99 9 kilohertz el DEFAULT SETTING 2 EXAMPLE v vv e Frequency setting 4 is selected The loop frequency is 34 9 kHz Mores Changing the frequency will reset the detector An unstable frequency display varying more than 0 2 kilohertz may indicate loop crosstalk or other 1 interference PARAMETER lt e Sensitivity SETTNGS noonoo 11 Selections 1 to 9 OFF or CALL L SETTING DISPLAYED 7 segment display wi
30. e loop and detector electronics which allows the detector to operate on poor quality loops including a single short to ground The transformer also limits the amount of static energy lightning that can transfer to the detector electronics A spark gap transient suppression device is connected across the loop inputs connected to the isolation transformer This device dissipates static charges before they reach the transformer A network of four capacitors is connected to the detector side of the isolation transformer Three of the capacitors can be switched in or out of the oscillator circuit to shift the frequency of the loop oscillator circuit thus providing frequency separation between adjacent loops The three switchable capacitors are electronically switched using FETs and are selected when programming parameter values with the front panel pushbutton switches The output from the loop oscillator is fed into a squaring circuit The sine wave from the loop oscillator circuit is squared to provide a precise zero crossing signal for the input to the microcontroller This signal is called the loop sample The loop sample is an integral number of complete oscillations from the loop oscillator circuit The number of loop oscillations counted is a function of the selected sensitivity setting for the detector The required number of loop oscillations needed for a loop sample increases as the sensitivity setting is increased The microcontroller uses the period o
31. es the bargraph to move seven segments UI HU q PRESENCE Step 5 A small motorcycle should be detected causing a one segment deflection three levels Note This method applies to conventional loop configurations only Other loop configurations such as Quadrupole will require a different method to correctly set sensitivity for motorcycle detection Increasing the sensitivity to detect motorcycles in some loop configurations will make the loop sensitive to adjacent lane detection If adjacent lane traffic is detected the phase will max time when no vehicles are present in the loop see Option 5 Phase Green Loop Compensation for a possible solution Full Restore To Factory Default Settings Pressing all three front panel switches simultaneously and continuously for five 5 seconds resets the detector and restores all the factory default settings The countdown of the five second period is displayed on the LCD Releasing any of the switches before the countdown ends aborts the Full Restore operation See Section 3 5 for default settings Display Test Pressing any two or three of the front panel switches simultaneously will turn on all possible symbols and messages on the LCD Page 22 of 29 6 0 BLOCK DIAGRAM Non volatile Memory Detect LED Loop Loop Loop Loop Inputs Isolation Oscillator Capacitors eee Squaring Circuit Micro Controller Front Panel Pushbutton Switches
32. eters Pending Call State Exit Program Mode Type of Loop Failure Press and Hold for One e Lhi Open Loop or L High Second e Llo Shorted Loop or L Low RESET Channel e Vehicle Count Press and Hold for Three Seconds Parameter Description e Name of Parameter UP Pushbutton e Timer in Operation e Increments Values e Toggles ON and OFF Numbered Loop Symbols e Channel Displayed DOWN Pushbutton e Flashing Program Mode e Decrements Values e Toggles ON and OFF NOTE There are no internal switches or jumpers to set Model L 1200 Series Operation Manual 03 25 05 Page 13 of 29 5 0 5 1 INSTALLATION AND SET UP The detector has no DIP switches or jumpers to configure Connect the detector to an appropriately wired harness and apply power If the detector is not new from the factory it may be advantageous to reset the detector back to the factory defaults to avoid having to check every setting To reset the detector to factory default press and hold all three pushbutton switches simultaneously for five seconds When all three buttons are depressed the display will start counting down from five 5 When the countdown reaches zero 0 releasing the pushbuttons will reload the factory defaults and reset the detector All operating parameters can be adjusted from the front panel The detector continues to operate normally while it is in the Program Mode The value currently displayed is always th
33. f the loop sample for accumulating high speed 32 MHz crystal clock pulses generated by the microcontroller s internal high speed crystal oscillator The number of crystal clock pulses accumulated during consecutive loop samples is compared to the internal reference number of crystal clock pulses stored in the microcontroller s memory When a vehicle enters the loop zone the loop inductance decreases This decrease in loop inductance causes an increase in the loop oscillator frequency In turn an increase in loop oscillator frequency results in a decrease of the time period for the loop sample Hence when a vehicle enters the loop zone the number of crystal clock pulses accumulated during a loop sample period decreases By comparing the new count with the reference count a percentage change can be calculated that indirectly relates to the inductance change If the magnitude of the change exceeds a selectable threshold sensitivity setting the detector activates an output device The rate of change is also monitored Slow rates of change caused by environmental fluctuations are tracked and automatically compensated for The microcontroller uses the high speed crystal clock count to calculate the loop inductance frequency and percentage of change If selected the values are displayed on the seven segment LCD The microcontroller also processes the pushbutton switch selections for the LCD and stores the operating parameters in non volatile memory
34. h The bargraph is a graphical representation of the relative change of inductance as seen by the detector It automatically takes into account the detector s sensitivity setting loop geometry configuration lead in length etc The first bar segment represents the minimum inductance change set by the sensitivity level necessary for the detector to output a call Each additional segment to the right represents the inductance change in excess of the next sensitivity threshold Usually the larger the vehicle the greater the AL L thus more and more segments are displayed The bargraph can be used as a precise indicator to select the proper sensitivity level The bargraph below shows the deflection 3 segments of a vehicle with Sensitivity set to Level 4 The vehicle in the loop zone is causing a change of inductance greater than 0 32 AL L or Sensitivity Level 2 C TTT The Bargraph is a window that adjusts to the sensitivity setting A UEL PA SS ca e mn mmm Yo of Inductance 0 0025 0 005 0 01 0 02 0 04 0 08 0 16 0 32 SENSITIVITY 9 8 7 6 5 4 3 2 PRESENCE The bargraph below has the same vehicle in the loop zone causing the same inductance change as above Since the sensitivity setting was increased to Level 7 six segments are now displayed If the bargraph displays 5 or 6 segments for a vehicle in the loop and motorcycles are not a concern the sensitivity has been set to the proper range
35. hem Check for places in the field where the loop wire or lead in cable may be pinched or chaffed Look for wires pinched under junction box covers and where the wire enters a conduit especially where the loop wire leaves the saw cut and enters a conduit After checking all of the above items you could swap out the detector but this type of failure is rarely ever related to the detector YES Did the display show L hi NO The display must have been L lo then This indicates an intermittent shorted loop or 25 inductance change Using a MegOhm meter measure the resistance from one of the loop wires to earth ground It should be greater than 50 megOhms Inspect the loop Look for exposed wires or debris pressed into the saw cut Check for places in the field where the loop wire or lead in cable may be pinched or chaffed Look for wires pinched under junction box covers and where the wire enters a conduit especially where the loop wire leaves the saw cut and enters a conduit If your cabinet has lightning or surge suppression devices on the loop inputs in the cabinet remove or replace them YES This indicates an intermittent open loop or 25 inductance change If you have any splices that are not soldered and sealed with an adhesive heat shrink or epoxy resin replace the splice with one that is Tighten all screw terminals in the signal cabinet that the loop circuit uses Check solder joints in the loop circuit especially on the harness itself D
36. il Safe mode and display LOOP FAIL on the LCD The type of loop failure will also be displayed as L lo for 25 change or shorted loop conditions or L hi for 25 change or open loop conditions This will continue as long as the loop fault exists However if the detector is reset or power is momentarily lost the detector will retune if the loop inductance is within the acceptable range If any type of loop failure occurs in one or more loop s in a group of two or more loops wired in parallel the detector will not respond with a Fail Safe output following any type of reset It is essential that multiple loops wired to a common detector channel always be wired in series to ensure Fail Safe operation under all circumstances At the time of a loop failure the LED will begin to flash at a rate of three flashes per second The LED will continue this display pattern until the detector is manually reset or power is removed If the loop self heals the LOOP FAIL message on the LCD will extinguish and the detector will resume operation in a normal manner except the LED will continue the three flashes per second display pattern thus providing an alert that a prior Loop Fail condition has occurred Each loop failure for the detector is counted and accumulated into the Loop Fail Memory The total number of loop failures written into the Loop Fail Memory since the last power interruption or manual reset is viewed by stepping through the functions in Progra
37. isconnect and reconnect any connector used in the loop circuit and check for loose pins and sockets in these connectors 8 5 Troubleshooting Intermittent Detector Lock Ups Have you been able to see the detector display while the loop was locked up NO See Troubleshooting Intermittent Loop Fail Problems and follow the path for unable to see the detector display while the loop failure was occurring YES Were more than two segments lit in the bargraph on the LCD NO Problems of this type tend to be difficult to isolate due to the many possible causes and the short duration of the symptom usually less than 30 minutes If the problem occurs more frequently in the morning or when raining suspect a short to earth ground in the loop lead in circuit This can usually be verified by testing with a MegOhm meter but not always Vibration can also be a possible cause Loop wires may be moving slightly in a conduit due to vibrations from truck traffic Utility lids in the street near the loop may also be a source of problems Ensure that lids near a loop are bolted down so that they cannot move Check that each set of loop wires is twisted together in each pull box and that lengths are not excessive And also see Troubleshooting Intermittent Loop Fail Problems and follow the path for a loop failure that displays L lo on the LCD YES See Troubleshooting Intermittent Loop Fail Problems and follow the path for a loop failure that displays L lo on the LCD
38. justable from 0 to 255 seconds in one second steps Call Delay time starts counting down when a vehicle enters the loop detection zone The remaining Call Delay time is continuously displayed on the LCD Whenever the Phase Green Input Call Delay Override signal pin J of the MS connector is active the Call Delay function is aborted and the Call Delay time is forced to zero Call Extension The detector s Call Extension is adjustable from 0 to 25 5 seconds in 0 1 second steps Extension time starts counting down when the last vehicle clears the loop detection zone The remaining Call Extension time is continuously displayed on the LCD Any vehicle entering the loop detection zone during the Call Extension time period causes the detector to return to the Detect state and later when the last vehicle clears the loop detection zone the full Call Extension time starts counting down again See Option 3 Call Extension Control for an alternate mode of operation for Call Extension Max Presence Timer When activated the detector s Max Presence timer is adjustable from 1 to 999 seconds in one second steps A setting of OFF turns the Max Presence timer off The Max Presence function is used to limit presence time by automatically resetting the detector If this function is enabled ON the Max Presence timer begins counting down when a call is initiated and the remaining time is continuously displayed on the LCD If the loop becomes vacant before th
39. ll show the currently selected setting 4 7 SEGMENT DISPLAY Currently selected Sensitivity sensivry DEFAULT SETTING 6 EXAMPLE vv e Sensitivity 5 is selected Nope Changing the sensitivity will reset the detector If the detector is in the call state when viewing this parameter the bargraph will show the strength of vehicle 1 calls so that the correct sensitivity can be verified from this screen PARAMETER w s Presence Pulse Mode SETTINGS cece Presence or Pulse SETTING DISPLAYED The word PRESENCE or PULSE will be displayed 7 SEGMENT DISPLAY Blank el DEFAULT SETTING Presence PULSE Exaupttg Pulse Mode is selected Mores If the detector is in the call state when this parameter is changed the change will not take effect until the detection zone is empty or the detector is reset PARAMETER v lt Delay SETTINGS lt lt c 256 Selections 0 to 255 Seconds in one second steps SETTING DISPLAYED 7 segment display will show the currently selected setting LI LI 7 SEGMENT DISPLAY Currently selected Delay time in seconds SECONDS el DEFAULT SETTING 0 seconds DELAY EXAMPLE aseene Delay of 10 seconds selected Mores If the detection zone is occupied when this parameter is changed the change will not take effect until the detection zone is empty or the detector is reset Model L 1200 Series
40. llowing detectors L 1200 R For NEMA TS 1 1989 applications calling for a single channel 120 volt AC shelf mount detector with relay outputs and an audible detect signal buzzer L 1200 R 240A For NEMA TS 1 1989 applications calling for a single channel 240 volt AC shelf mount detector with relay outputs and an audible detect signal buzzer L 1200 R 24A For NEMA TS 1 1989 applications calling for a single channel 24 volt AC shelf mount detector with relay outputs and an audible detect signal buzzer L 1200 R 24D For NEMA TS 1 1989 applications calling for a single channel 24 volt DC shelf mount detector with relay outputs and an audible detect signal buzzer L 1200 SS For NEMA TS 1 1989 applications calling for a single channel 120 volt AC shelf mount detector with solid state outputs and an audible detect signal buzzer L 1200 SSTX For NEMA TS 1 1989 applications calling for a single channel 120 volt AC shelf mount detector with solid state outputs and an audible detect signal buzzer Connector pin outs per Texas DOT L 1201 R For NEMA TS 1 1989 applications calling for a single channel 120 volt AC shelf mount detector with True Count outputs relay outputs and an audible detect signal buzzer L 1201 SS For NEMA TS 1 1989 applications calling for a single channel 120 volt AC shelf mount detector with True Count outputs solid state outputs and an audible detect signal buzzer Model L 1200 Series Ope
41. m Mode until the LOOP FAIL message is displayed Model L 1200 Series Operation Manual 03 25 05 Page 10 of 29 3 4 3 5 TABLE Sensitivity AL L amp Response Times Response Time Response Time Sensitivity Noise Filter Enabled Noise Filter Disabled Option 4 OFF Option 4 ON OFF Gel el en 1 0 64 96 16 ms 12 2 ms 2 0 32 96 16 ms 12 2 ms 3 0 16 96 16 ms 12 2 ms 4 0 08 96 16 ms 12 2 ms 5 0 04 96 16 ms 12 2 ms 6 0 02 96 16 ms 15 3 ms 7 0 01 96 16 ms 23 5 ms 8 0 005 96 16 ms 38 8 ms 9 0 0025 96 16 ms 68 14 ms CALL IG fre Gen TABLE Default Settings Function Setting Frequency 2 Sensitivity 6 Delay Time 0 Extension Time 0 Max Presence Time OFF Presence Pulse Mode Presence EOG OFF Option 1 Loop Inductance Display OFF Option 2 Loop Inductance AL L Display OFF Option 3 Call Extension Control OFF Option 4 Noise Filter Disable OFF Option 5 Phase Green Loop Compensation OFF Option 6 0 Display Vehicle Count OFF Option 6 1 Reset Vehicle Count OFF Option 7 Number of Loops 04 Option 11 Audible Detect Signal OFF Option 12 0 Detector Disconnect OFF Option 12 1 Detector Disconnect Type OFF Model L 1200 Series Operation Manual 03 25 05 Page 11 of 29 3 6 TABLES Pin Assignments RELAY OUTP
42. nse time When this option is OFF internal noise filtering is utilized When the detector is used in speed and or occupancy applications the noise filter should be disabled i e Option 4 ON to provide the most accurate data possible It is recommended that this option not be activated The factory default setting of OFF provides stable operation in high crosstalk environments NOTE Changing the setting of this feature will reset the detector The Loop Fail Count is not reset when the setting of Option 4 is changed Also changing the setting of Option 4 will not cause the prior Loop Fail indication to cease see Section 5 3 Loop Fail Indications 2 12 Option 5 Phase Green Loop Compensation The detector s Phase Green Loop Compensation setting can be toggled ON or OFF by momentarily pressing either the A UP or V DOWN button When Option 5 is enabled ON normal loop compensation is used until the Phase Green Input signal pin J of the MS connector becomes active Once the Phase Green Input signal is active the detector desensitizes the loop Maximum desensitization is 0 05 AL L This desensitization tunes out small changes such as adjacent lane pickup therefore minimizing the chance of max timing an empty lane Note A small motorcycle may also be tuned out in a short period of time following the start of Phase Green This option is useful in minimizing false detection resulting from adjacent lane pickup when a detector must be run with
43. nsulation type XLPE for loop wire Typical sensing height is 7 of the shortest leg of a loop Therefore a 6 x 6 loop will have a detection height of 4 The inductance of a conventional four sided loop can be estimated using the formula L Px T T 4 Where L Loop Inductance in microhenries P Loop Perimeter in feet T Number of Turns of Wire Therefore a 6 by 6 loop with 3 turns would have an inductance of L 6 6 6 46 x 3 3 4 L 24x 94 3 4 L 24x12 4 L 24x3 L 72 microhenries The inductance of a Quadrupole loop can be estimated using the formula L Px T T 4 CL x T T 4 Where L Loop Inductance in microhenries P Loop Perimeter in feet T Number of Turns of Wire CL Length of Center Leg in feet Therefore a 6 by 50 loop with a 2 4 2 configuration would have an inductance of L 6 50 6 50 x 2 2 4 50 x 4 4 4 L 112 x 4 2 4 50 x 16 4 4 L 112x6 4 50x20 4 L 112 x 1 5 50 x 5 L L 418 microhenries Loop Feeder cable typically adds 0 22 microhenries of inductance per foot of cable Total inductance of loops connected in series Loo L4 Lo L3 Ly Total inductance of loops connected in parallel Lrora 1 1 144 1 Lb 1 L3 4 1 Ly J Model L 1200 Series Operation Manual 03 25 05 Page 28 of 29 This page intentionally left blank Model L 1200 Series Operation Manual 03 25 05 Page 2
44. on voltage The output is protected with a 33 volt Zener diode connected between the collector drain and emitter source 3 3 Operational DISPLAY The LCD backlighting illuminates whenever any pushbutton is pressed The backlighting will extinguish 15 minutes after the last pushbutton press DETECT INDICATOR The detector has a super bright high intensity red light emitting diode LED to indicate a Call Output Delay Timing Extension Timing Pending State or Failed Loop condition RESPONSE TIME Meets or exceeds NEMA TS 1 1989 response time specifications See Section 3 4 for actual response times SELF TUNING The detector automatically tunes and is operational within two seconds after application of power or after being reset Full sensitivity and hold time require 30 seconds of operation ENVIRONMENTAL amp TRACKING The detector is fully self compensating for environmental changes and loop drift over the full temperature range and the entire loop inductance range GROUNDED LOOP OPERATION The loop isolation transformer allows operation with poor quality loops which may include one short to ground at a single point Loop FEEDER LENGTH Up to 5000 feet 1500 m maximum with proper feeder cable and appropriate loops Loop FAIL MONITOR If the total inductance of the detector s loop input network goes out of the range specified for the detector or rapidly changes by more than 25 the detector will immediately enter the Fa
45. onnect The detector s Detector Disconnect setting can be toggled ON or OFF and the Extension timer toggled between ON and OFF by momentarily pressing either the A UP or V DOWN button The Detector Disconnect feature requires that the Phase Green Input be connected to the proper controller phase When the Phase Green Input is not active the detector shall operate normally When the Phase Green Input is active the extension timer will start to count down at the end of each detection If this timer reaches zero before the next detection the detector will no longer output a call until the Phase Green Input is not active Since the extension timer is used as a disconnect timer while in this mode two different disconnect types are available Option 12 1 OFF Extension timing still occurs and the extension timer is also the disconnect timer during phase green This will cause the call output to remain in the Call state until disconnect occurs This may allow the user to use gap times appropriate for the advance loops without considering the effects on the stop bar loops Option 12 1 ON Extension timing is disabled and the extension timer is used as the disconnect timer This will cause the call output to follow the occupation of the loop detection zone until disconnect occurs This feature is intended to be used in applications where a loop at the stop bar is not needed after any waiting queue in the associated traffic lane is moving during the green
46. ration Manual 03 25 05 Page 5 of 29 2 0 2 1 2 2 2 3 2 4 2 5 2 6 GENERAL CHARACTERISTICS Loop Frequency There are eight 8 selectable loop frequency settings normally in the range of 20 to 100 kilohertz The actual loop operating frequency is a function of the loop lead in network and the components of the loop oscillator circuit The digital display of the actual loop operating frequency for each setting makes it easy to quickly identify and eliminate crosstalk in the most difficult to configure intersections The frequency display is typically very stable when the loop is vacant and vehicles are not passing nearby the loops If the reading is varying by more than 1 in the last digit this is an indication of possible crosstalk between loops Sensitivity There are nine 9 selectable sensitivity levels plus Continuous Call and Channel Off The sensitivity levels are designed so that a one level increase actually doubles the sensitivity and a one level decrease halves the sensitivity A unique bargraph displayed on the LCD makes it easy to quickly set sensitivity at the ideal level for any loop lead in network configuration See Section 3 4 for actual detection levels at each sensitivity level CONTINUOUS CALL When set to the Continuous Call state the detector s output is continuously in the Call state regardless of the presence or absence of vehicles over the loop The loop oscillator is disabled when in the Con
47. re the disconnect timer reaches zero the detector outputs the new call to the traffic controller and the disconnect timer is reset to its initial value Once the stop bar detection zone remains clear for a time equal to the programmed disconnect time the detector is disabled and will not generate any further calls to the traffic controller until after the green has terminated When the stop bar detection loop is disabled the green phase can only be extended by vehicles detected by the advance detection loop NOTE The disconnect timer will always time an initial gap each time that the phase turns green If Option 12 1 is OFF the detector will generate an output for the specified extension time at the start of each green phase SPECIFICATIONS Physical WEIGHT 24 oz 680 4 gm SIZE 4 70 inches 11 94 cm high x 2 50 inches 6 35 cm wide x 5 90 inches 14 99 cm deep excluding connector Connector adds 675 inch 1 71 cm to depth measurement OPERATING TEMPERATURE 40 F to 180 F 40 C to 82 C CIRCUIT BOARD Printed circuit boards are 0 062 inch thick FR4 material with 2 oz copper on both sides and plated through holes Circuit board and components are conformal coated with polyurethane Model L 1200 Series Operation Manual 03 25 05 Page 9 of 29 CONNECTOR MS3102A 18 1P See Section 3 6 for pin assignments 3 2 Electrical POWER 89 to 135 VAC 50 60 Hz 6 Watts maximum 120 volt AC models 180 to 270 VAC 50 60 Hz 6 Wa
48. s An eight segment bargraph at the top of the LCD can be used to provide a graphical representation of the relative change of inductance as seen by the detector at the current sensitivity level The bargraph automatically takes into account loop size loop inductance number of loops number of turns loop geometry lead in length etc The bargraph functions as a sliding scale that relates to the programmed Sensitivity Level The first left most bargraph segment represents the minimum inductance change necessary for the detector to output a call at the currently selected sensitivity level Larger inductance changes will indicate more segments Each additional segment indicates that the next sensitivity level has also been met or exceeded When used in this manner the bargraph provides an indication of whether the sensitivity is set too high or too low facilitating the ideal setting of the sensitivity level All programmed settings are stored in non volatile memory and can only be changed by programming new settings Loss of power or a detector reset will not change any of the programmed settings If a loop failure occurs the LCD will display the type of loop failure as L lo for 25 change or shorted loop conditions or L hi for 25 change or open loop conditions Each loop failure is counted and accumulated in the Loop Failure Memory The number of loop failures since the last detector reset or power interruption is very useful information to have a
49. s not due to the operational function Option 12 Detector Disconnect STATE iia Loop Inductance Display Option 1 ON BARGRAPH DispLay OFF if no vehicle is detected Number of sensitivity levels that the inductance change caused by the vehicle exceeds the detection threshold first dot current sensitivity level second dot next lower sensitivity level etc if a vehicle is detected 7 SEGMENT DisPLAY Loop Lead In circuit inductance in microhenries If the value exceeds 999 the display will alternate between the thousands place 1 or 2 and the lower three digits of the inductance value TEXT ii L DETECT LED The detect LED operates normally indicating call no call delay extension and or pending as expected DETECTOR OUTPUT The detector output operates normally r D co BS e LU EXAMPLE vv e The Loop Lead In circuit inductance is 98 microhenries and the detector is not detecting a vehicle Morts If Option 2 AL L Display is ON this display is only visible when the detector is not detecting a vehicle Model L 1200 Series Operation Manual 03 25 05 Page 19 of 29 Era Loop Inductance AL L Display Change Option 2 ON BARGRAPH DisPLAY OFF 7 SEGMENT DisPLAY Percentage of change in inductance of the Loop Lead In circuit TEXT hte degen AL L DETECT LED The detect LED operates normally indicating call no call
50. t YES Probably not a power related problem 8 2 Troubleshooting Initialization Problems Does the LCD display the Model and Firmware version when powered up NO Replace the detector with a known good unit Does the LCD display the Model and Firmware version when powered up NO The connector or wiring harness is defective Confirm correct wiring of the harness and that the connector is not defective or damaged Check for unexpected voltages on any pin YES Replaced unit was defective YES After two seconds are three dashes Call Off or a Loop Fail message displayed on the LCD NO Replace the detector with a known good unit After two seconds are three dashes Call Off or a Loop Fail message displayed on the LCD ic NO The connector or wiring harness is defective Confirm correct wiring of the harness and that the connector is not defective or damaged Check for unexpected voltages on any pin YES Replaced unit was defective YES The unit is initializing correctly Model L 1200 Series Operation Manual 03 25 05 Page 25 of 29 8 3 Troubleshooting Loop Fail Problems Does the LCD display L hi and Loop Fail NO Does the LCD display L lo and Loop Fail ae NO The detector has tuned up to the existing loop lead in circuit and it is within acceptable limits YES There is probably a short in the loop lead in circuit Disconnect the loop from the terminal block in the cabinet Does the status now show L hi Loop Fail
51. therefore a reset would not result in the loss of a call when traffic comes to rest over the loop s The EOG function is only available when the Max Presence function is set between 1 and 999 seconds It is not available when the Max Presence function is OFF When the EOG function is enabled ON the detector will automatically be reset at the same time the Phase Green Input signal pin J of the MS connector transitions from the ON state to the OFF state if the Max Presence Time has counted down to zero and is resting in the wait state The signal on pin J of the MS is also called the Call Delay Override See Section 3 2 Phase Green Input specifications for voltage levels 2 8 Option 1 Loop Inductance Display The detector s Loop Inductance Display setting can be toggled ON or OFF by momentarily pressing either the A UP or V DOWN button When this option is enabled ON the LCD displays the total loop inductance actual loop inductance plus actual lead in inductance in microhenries for loop inductance values in the range of 20 to 2500 microhenries By recording the inductance of the loop lead in circuit when it is first installed the actual inductance can be compared to the expected inductance to help identify defective loop lead in circuits Loop lead in inductance can be easily estimated using the simple formulas included in Section 8 7 of this manual NOTE This option is automatically disabled 15 minutes after activation or on loss
52. tinuous Call state This state is indicated by CALL flashing on the LCD This option is selected from the Sensitivity menu in Program Mode and is useful for checking controller response and other troubleshooting activities CHANNEL OFF When set to the Channel Off state the detector s output is continuously in the No Call state regardless of the presence or absence of vehicles over the loop The loop oscillator is disabled when in the Channel Off State This state is indicated by OFF flashing on the LCD This option is selected from the Sensitivity menu in Program Mode and is useful for checking controller response and other troubleshooting activities Presence Pulse One of two mutually exclusive modes of operation is available Presence or Pulse mode is toggled by momentarily pressing either the A UP or V DOWN button PRESENCE MODE Provides a call hold time of at least four minutes regardless of vehicle size and typically one to three hours for an automobile or truck PULSE MODE An output Pulse of 125 10 milliseconds duration is generated for each vehicle entering the loop detection zone Each detected vehicle is instantly tuned out if it remains in the loop detection zone longer than two seconds This enables detection of subsequent vehicles entering the loop detection zone After each vehicle leaves the loop detection zone the detector resumes full sensitivity within 0 5 seconds Call Delay The detector s Call Delay is ad
53. tly stays in the Call state See Troubleshooting Intermittent Detector Lock Ups Detector will not time delay See Troubleshooting Delay Problems Detector does not always time delay See Troubleshooting Delay Problems LCD displays Pnd and the detector does not output a call The detector does not always time extension Option 3 is on EOG is turned on and the Phase Green Input is not transitioning from green to not green The sensitivity has been set to Call forcing the detector to output a constant call Detector disconnect Option 12 0 has been turned on Max Presence never resets the detector LCD always displays a flashing Call 8 1 Troubleshooting Power Problems Does the LCD display anything when the detector is powered up NO Do any of the detectors in the cabinet display anything when powered up NO Check the AC or DC Power Supply voltage Is it greater than 89 VAC and less than 135 VAC 120 VAC models or greater than 180 VAC and less than 270 VAC 240 VAC models or greater than 18 VAC and less than 30 VAC 24 VAC models ae NO Determine why power is out of tolerance and have it corrected YES Wiring from the Power Supply to detector is incorrect or defective YES Swap the detector with a working detector Did the problem follow the swapped detector Ee NO Confirm correct wiring of the harness and that the pins in the connector are not damaged YES The swapped unit is defective Replace the uni
54. tts maximum 240 volt AC models 18 to 30 VAC 6 Watts maximum 24 volt AC models Loop INDUCTANCE RANGE 20 to 2500 microhenries with a Q factor of 5 or greater Loop INPUTS Transformer isolated The minimum capacitance added is 0 068 microfarad LIGHTNING PROTECTION Meets and or exceeds all applicable NEMA TS 1 1989 specifications for transient voltage protection RESET Meets and or exceeds NEMA TS 1 1989 detector specifications When operating in Normal Mode the detector can be reset by pressing and holding the FUNC button for three seconds The detector can also be reset by removing and reapplying power by changing the setting of Option 4 Noise Filter Disable or by changing either the sensitivity or loop frequency setting PHASE GREEN INPUT Also known as Call Delay Override Meets and or exceeds all NEMA TS 1 1989 requirements Application of a high state voltage 89 to 135 VAC to pin J of the MS connector causes the delay timer for the detector to abort the delay timing function and also provides control for Phase Green Loop Compensation Max Presence Timing End of Green Extension Timing and Detector Disconnect if the features are programmed RELAY RATING The relay contacts are rated for 6 Amps maximum 150 VDC maximum and 180 Watts maximum switched power SOLID STATE OUTPUT RATING Optically isolated 30 VDC maximum collector drain to emitter source 100 mA maximum saturation current 2 VDC maximum transistor saturati
55. unt of inductance change in each loop In the single loop setting 01 square or rectangular configurations will give slightly better results than Quadrupole configurations 3 Loop Placement Loops should always be placed in the center of the traveled lane Loops should extend out in front of the stop bar For turning movements loops should not extend so far out in front of the stop bar that exiting vehicles would exit more out of the side of the loop than out the front of the loop If the detector is operating in the multiple loop mode and other movements of traffic clipping the front edge of the loop are a concern the detector will only count vehicles that cross more than one loop It will ignore all vehicles that clip a single loop 4 Sensitivity Setting The sensitivity should be set so that a single passenger vehicle in the detection zone creates a seven dot deflection on the bargraph on the LCD Whenever the detector is powered up the sensitivity is changed or the loop configuration is changed the detector will enter the training mode While in this mode the detector is evaluating individual vehicles passing through the detection zone This means that no other vehicle can occupy any part of the detection zone while a vehicle passes through The detector will accumulate counts during the training period Optimal count accuracy will occur after the training period is complete Depending on traffic density and the length of detection zone
56. vailable during analysis of intermittent loop operation When operating in the Program Mode the Model L 1200 Series displays the real time loop frequency reading The eight frequency settings can be incremented or decremented to provide precise frequency readings removing any guesswork when changing frequency settings to eliminate crosstalk NOTE Adjacent loops connected to different channels of a non scanning detector or different scanning detectors should be set to different frequencies with maximum separation The Reno A amp E Model L 1200 Series utilizes the first major innovation in inductive loop detectors since the introduction of digital detectors The programming of all of the detector s parameters with four normally open pushbutton switches not only simplifies setup by removing binary coded DIP switches but also increases the reliability of the detector by eliminating the dependence on switch contacts during normal operation The detailed descriptions displayed on the LCD eliminate the interpretation of numerous LED flash rates to determine the detector status In addition the Model L 1200 offers the versatility of software control Special functions are possible with a simple change of the socket mounted microprocessor Special functions are defined as unique options e g Option 6 Option 12 etc Special option functions are activated through the use of the LCD menu option programming The Model L 1200 Series is comprised of the fo
57. value between and 999 Operation of this feature requires that the Phase Green Input be correctly connected to the controller phase green circuitry PARAMETER lt Option 1 Loop Lead In Inductance Display SETTNGS eee ON or OFF SETTING DISPLAYED The word ON or OFF will be displayed 7 SEGMENT DispLay The number of this option el DEFAULT SETTING OFF EXAMPLE E Option 1 is turned ON Morts This option will automatically turn off 15 minutes after being activated or on OPTION ON loss of power 1 PARAMETER lt Option 2 Percentage of Inductance change AL L SETTINGS cece ON or OFF SETTING DISPLAYED The word ON or OFF will be displayed 7 SEGMENT DisPLay The number of this option IL DEFAULT SETTING OFF EXAMPLE E Option 2 is turned OFF Nope This option will automatically turn off 15 minutes after being activated or on OPTION OFF loss of power PARAMETER lt Option 3 Call Eztension Control SETTINGS o n ON or OFF SETTING DISPLAYED The word ON or OFF will be displayed 7 SEGMENT DisPLay The number of this option Lit el DEFAULT SETTING OFF EXAMPLE E Option 3 is turned ON NOTES icine Operation of this option requires that the Phase Green Input be correctly OPTION ON pi connected to the controller phase green circuitry 1
58. y a vehicle that exceeds the detection threshold by four 4 sensitivity levels and the detector is outputting a call Start Pulse Call BARGRAPH DISPLAY OFF SEH MM 7 SEGMENT DISPLAY for 125 milliseconds TBT PULSE indicating detection mode of the detector el DETECTLED ON for 125 milliseconds PULSE DETECTOR OUTPUT ON for 125 milliseconds EXAMPLE aeoea The detection zone is occupied and detector is outputting a call of 125 milliseconds duration EEN E This display is only shown for 125 milliseconds the duration of the pulse output HHM III STATE Timing Delay BARGRAPH DISPLAY Number of sensitivity levels that the inductance change caused by the vehicle A l W exceeds the detection threshold first dot current sensitivity level second dot LI LI 4 next lower sensitivity level etc SECONDS el 7 SEGMENT DISPLAY Countdown of remaining Delay time in seconds DELAY TEXT EE SECONDS DELAY and PULSE or PRESENCE PRESENCE DETECT LED Four Hz flash rate with 50 duty cycle 125 ms ON 125 ms OFF DETECTOR OUTPUT OFF EXAMPLE lt lt v lt e The detection zone is occupied by a vehicle that exceeds the detection threshold by two 2 sensitivity levels there are three 3 seconds of Delay remaining and the detector is not outputting a call STATES ee Timing Extension BARGRAPH DISPLAY OFF f I L 7 S
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