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GTT Canoga C924 Series Installation Manual

Traffic sensing system vehicle detector
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Installation Manual
January 2013
Canoga Traffic Sensing System
C924X Series Vehicle Detector

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Summary of Contents for GTT Canoga C924 Series

  • Page 1 Installation Manual January 2013 Canoga Traffic Sensing System C924X Series Vehicle Detector...

  • Page 3: Table Of Contents

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual Table of Contents 1 About This Manual ..................1 Manual Organization ..................1 Purpose of Manual ..................1 Manual Audience ..................2 Model Numbers ................... 2 Manual Conventions ..................2 2 Safety ......................3 Intended Use ....................
  • Page 4 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual Technical Support ..................14 5 Vehicle Detector Setup & Configuration ............15 Factory Defaults & Quick Startup ..............15 5.1.1 Quick Startup ................15 Recommended Setup & Configuration ............... 18 5.2.1 Initial Hardware Setup ..............18 5.2.2 Determining Your Configuration Method ..........
  • Page 5 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 8.2.9 Sensitivity ................... 67 8.2.10 Frequency per Channel ..............67 8.2.11 Power Switch................67 8.2.12 Communication Ports ..............68 8.2.13 Front Panel LED Indicators ..............68 8.2.14 Sensitivity Operating Modes .............. 69 8.2.15 Environmental Adaptation ..............
  • Page 6 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual iv – Table of Contents...

  • Page 7: About This Manual

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 1 About This Manual Manual Organization Section 1 About This Manual Contains information about the organization and content of this manual. Section 2 Safety Contains important information about safety messages and safety precautions and regulatory Requirements Conformance including testing the traffic monitoring cards for conformance to regulatory requirements.

  • Page 8: Manual Audience

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual Manual Audience This manual is written for GTT certified traffic system installers and maintenance technicians. Model Numbers The C924X vehicle detectors have four-channels (two channel pairs). All vehicle detectors are components of a matched component system.

  • Page 9: Safety

    GTT 701 or 702 Microloops™. The vehicle detectors may also be connected to standard inductive loops. Technical Support If you have any questions about the system, its use, or operation, please call the GTT Technical Service Department at 1-800-258-4610 or +1 (651) 789-7333 (Worldwide Technical Service). Safety Messages We include safety messages in this manual to help protect your safety and the safety of others.

  • Page 10: Work Zone Traffic Control

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 2.4.2 Work Zone Traffic Control Proper control of vehicle traffic is important during many procedures. When necessary, we recommend that you have people trained in manual traffic control, such as police officers, assist you. When you install devices that require you to position vehicles, equipment, or people in or near the roadway it is important that you use appropriate work zone traffic control techniques, equipment, and procedures.

  • Page 11: Hardware Installation

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 3 Hardware Installation This section describes how to check and install card rack wiring, how to install accessory modules on the Canoga C924X vehicle detectors, and how to install those vehicle detectors. Pre-Installation Check the card rack or input file connector to be sure that it is a properly wired 44 contact card-edge connector.

  • Page 12: Switch/Call Outputs

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 3.2.1 Switch/Call Outputs The structure of the channel switch/call outputs is indicated in Figure 3-1 Switch/Call Output Structure below. The + terminal of each output must be connected to the more positive of the two Connect the outputs only to load configurations that meet the requirements stated in Section 8.2 Vehicle Detector Specifications on page 65.

  • Page 13: Rear Connector Communication Port Wiring

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 3.2.4 Rear Connector Communication Port Wiring To use the rear communication port on C924X vehicle detectors, the card rack connectors that receive vehicle detectors must be wired as follows. These points must then be connected to the appropriate pins of a connector going to a device communication port.

  • Page 14: Cable - Front Port To Pc (9-Pin Dsub Sockets Both Ends)

    3.3.1 Cable - Front Port to PC (9-Pin DSUB sockets both ends) To connect a PC to the front panel TIA-232 port, you may use a GTT C900 Communication Cable or a null modem cable that conforms to the connections indicated in Figure 3-3 Null Modem Cable Schematic below.

  • Page 15: Cable - C92X Rear Tia-232 Port To Pc

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 3.3.4 Cable - C924X Rear TIA-232 Port to PC The rear TIA-232 communication port, obtained by installing an 832 communication module on a C924X, may be connected to a PC using the cabling indicated in Figure 3-5 Cable – Rear C924X TIA-232 Port to PC below.
  • Page 16 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual Table 3-1 C924X Vehicle Detector Card-Edge Connector Contact Assignments Function C924X Function C924X Synchronize Conductor 1 Common of +VDC (0 VDC)   +VDC (+10.8VDC to 38VDC) Synchronize Conductor 2   RESET External No Connection ...

  • Page 17: Accessory Module Installation

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual Accessory Module Installation If you are installing either the optional 832 Communication Module or the optional 848 Memory Module, perform the following steps: 1. Remove the two jumpers from the 5-pin connector on the vehicle detector. Figure 3-7 Accessory Module Installation 2.
  • Page 18 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 12 – Hardware Installation...

  • Page 19: Software Installation

    C924X vehicle detectors. C900-CS is an applet that runs under ITS Link, which is the program used to launch the GTT configuration software. GTT recommends using ITS Link version 3.4.08 or later with the 924X which is free download from http://www.GTT.com.

  • Page 20: Technical Support

    If you encounter problems while installing C900 Configuration Software, call Technical Support at 1- 800-258-4610 or +1 (651) 789-7333 (Worldwide Technical Service). For help with technical issues, see the GTT Website, which you can access by pointing your Web browser to http://www.GTT.com. 14 – Software Installation...

  • Page 21: Vehicle Detector Setup & Configuration

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 5 Vehicle Detector Setup & Configuration Factory Defaults & Quick Startup The vehicle detector units leave the factory with settings that typically provide good operation with common loops. However, it is recommended to go through all of the steps this section. If a Microloop is the sensor, it is necessary to use the Front Panel DIP settings to change the sensor type to Microloop and to make any other settings changes necessary.
  • Page 22 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual Table 5-1 C924X Settings C924X Settings by Channel Channel 1 Channel 2 Channel 3 Channel 4 Setting Sensor Type Sensitivity Sensitivity Mode Pres Pres Pres Pres Pres Pres Pres Pres Frequency Threshold Multiplier Slope Timer 0.15 0.15...
  • Page 23 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual C924X Settings by Unit Value Setting Current Factory Hardware Default Status Outputs Enabled Enabled Enabled Open Loop (CALL during Open) Enabled Enabled Sorted Loop (CALL during Short) Enabled Enabled >25% delta L (CALL after and for duration of large Enabled change –...

  • Page 24: Recommended Setup & Configuration

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual Recommended Setup & Configuration 5.2.1 Initial Hardware Setup It is recommended that the following steps be followed in setting up a new Traffic Sensing System Installation. See to Section 7.4 Diagnostic Codes on page 63 for diagnostic codes displayed on the front panel. 5.2.1.1 Checking Card Connector &...

  • Page 25: Determining Your Configuration Method

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 5.2.2 Determining Your Configuration Method Determine which setup procedure to use. You can set up the operating parameters for the loop detector in either of two ways: • Manual Setup — using several switches on the loop detector. •...
  • Page 26 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual Figure 5-1 Delay/Extension Switches Table 5-2 Delay and Extension Switch Values Switch Segment Delay Off Delay On Extension OFF Extension On 1 second Delay 0.25 second Extension 2 second Delay 0.50 second Extension 4 second Delay 1 second Extension 8 second Delay...
  • Page 27 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 5.2.3.3 Setting Mode and Sensitivity See Section 8.2.14 Sensitivity Operating Modes on page 69 for a description of these functions. 1. Select both the Mode (Pulse or Presence) and Sensitivity level using the touch pad position keys on the loop detector front panel.

  • Page 28: Software Setup Procedure

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 5.2.3.4 Selecting the Frequency See Section 7.1 - Eliminating Crosstalk on page 61 for information on selecting frequency to eliminate crosstalk between loop detectors. 1. Select Low, Medium, or High frequency by setting the 3-position Frequency switch on the Canoga™...
  • Page 29 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual If this is the first time you are communicating to a unit, be certain the communication link is connected to only one unit. This is because the factory default address of the card is 255 (FFh).
  • Page 30 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual The reading operation cannot be cancelled. If there is a communication problem, the system will eventually timeout. Correct any problem before reattempting to read settings. The most frequent problems are that the wrong COM port was selected or that the wrong baud rate was used.
  • Page 31 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 8. Click on the Communication tab. 9. Set the PC communication port baud rate to the same baud rate as the vehicle detector. If the baud rate at the vehicle detector is unknown, it is recommended that they be tried in the following order: 9600, 38400, 19200, 1200, 2400, 4800.
  • Page 32 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual At the ITS Link – Canoga Model C924 screen, 1. Double-click on the Settings icon to start configuring the vehicle detector. The Settings window displays. 2. Click the Channel tab. The Channel window tab displays. 3.
  • Page 33 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 5. If your vehicle detector is connected to a loop, click the Default radio button for each channel connected to a loop. 6. For every vehicle detector channel connected to a Microloop, click on the Microloop radio button.
  • Page 34 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual Microloop Mode setup are followed, proper operation is expected when an inductive loop is attached to a channel configured for Microloop operation. 5.2.4.3 Setting Synchronization Using this feature helps eliminate crosstalk between adjacent loops that are attached to separate vehicle detectors where rewiring loop inputs into the same vehicle detector is not an option.
  • Page 35 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 5.2.4.4 Setting Noise Immunity Parameters At the Noise Immunity tab, 1. When doing speed measurement, the most accurate results, as a general rule, are obtained when: Power Line Filter = Disabled Oversampling = X1 Overscan = Disabled If no measurements other than traffic volume are of interest, start with the default settings: Power Line Filter = Enabled...
  • Page 36 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual The Start button then changes to Stop. 3. Check the value of loop inductance for each channel. It should be equal to the inductance of the sensor plus the inductance of the lead-in and home-run cable (about 23 microhenries per 100 feet (30 meters)).
  • Page 37 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 5.2.4.6 Setting Final Sensitivity & Microloop Mode Parameters 1. Close the Settings window and open the Real Time Activity Monitoring window. 2. Monitor the Delta-L (inductance change) line for the inductance change caused by a typical automobile.
  • Page 38 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual Table 5-3 Sensitivity Setting Values Sensitivity Detect Threshold Desirability 1024 nH Rarely Appropriate 512 nH Seldom Appropriate 256 nH 128 nH 64 nH 32 nH Unusual Situations Only 16 nH Unusual Situations Only 8 nH Not Recommended Whenever the sensitivity is changed on channels attached to Microloops, the Threshold...
  • Page 39 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual Figure 5-3 Typical Sensitivity Settings The sensitivity settings indicated in Figure 5-2 are recommended initial settings. When you test a new system, check the sensor response to vehicles on each channel and adjust the Sensitivity setting to provide reliable detection and consistent occupancy determination.
  • Page 40 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 5.2.4.7 Verifying Counting Accuracy At the Real-Time Activity Monitoring screen, 1. Compare counts shown in the Real-Time Activity Monitoring screen to visual counts. The counts should match. Also, when a lane contains “speed traps”, the count on the lead sensor should match the count on the lag sensor for the percentage of the vehicles that are not switching lanes at the speed trap.
  • Page 41 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 5.2.4.9 Counting Long-Loops Use the following procedure to configure and tune counting of vehicles traveling over long loops using C900-CS. It is important to note that long-loop count is provided via a serial connection or can be stored as binned traffic data.
  • Page 42 TM-2003-10 Long-Loop Counting Setup Procedures for C800 Series Vehicle Detectors when using the long-loop counting function. This technical bulleting can be obtained from GTT technical service by contacting them at the address and/or phone number listed on the back page of this document.
  • Page 43 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 3. Select the loop type using the Loop Type drop down box. If your loop type cannot be found, select Other as your loop type. After selecting a loop type, you should see the suggested Field Length for the selected loop type. Suggested field lengths are modifiable parameters and can be changed at any time to help calibrate length calculations.
  • Page 44 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 2. Once this tab has been selected, check the enable box for the channels to be viewed (disable the channels you do not wish to view) during real-time sampling of the speed trap. Channels with cleared check boxes will not be displayed.
  • Page 45 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual Speed should now be calibrated. This may be verified by repeating laser gun speed measurements or having the test vehicle travel over the speed trap multiple times. Vehicle length measurement is calibrated by adjusting the effective detection length (Field Length) of the sensor.
  • Page 46 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 1. Double-click on the Traffic Data Binning icon in C900-CS to open the Traffic Data Binning window. 2. Click on the Properties button. In the Binning Channel Setup section, enable the channels for which historical binning data is desired by clicking on the channels’...
  • Page 47 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual Binning is synchronized to a clock reference by setting the PC time to the same time as the clock reference. Binning is then started at a time that will synchronize all units. For the example of Binning Period of 15 minutes, one could achieve synchronization by starting at 6:15 PM, 6:30 PM, 6:45 PM etc.
  • Page 48 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 5.2.4.14 Setting Noise Immunity Settings The following screen shows the Noise Immunity settings typically used for occupancy detection and vehicle counting. 5.2.4.15 Setting Power Line Filter The Power Line Filter may be enabled when the interference magnetic field generated by current in the mains/power line cannot be handled by other means.
  • Page 49 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual Setting Oversampling = X2 doubles the channel measurement time and thus doubles the signal-to-noise ratio. This results in a significant increase in scan time. Setting Oversampling = X4 again doubles the channel measurement time and signal-to-noise ratio. 5.2.4.17 Setting Overscan Overscan may be used to eliminate false detects when peak-to-peak noise is less than sensitivity threshold.
  • Page 50 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual Recovery will cause the Reference Frequency to track these false frequency decreases. Then, immediately after the lighting, the channel will have a stuck call. The duration of this call may be limited by setting Max. Presence (see Section 5.2.4.25 Setting Max Presence Parameters.) When the channel sensor is a Microloop, Pulse mode has only one characteristic - the channel switch/call output turns ON for Pulse time when a vehicle arrives at the sensor.
  • Page 51 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 5.2.4.24 Setting Microloop Background Adapt Rate The default background Adapt Rate for channels having Microloops is 1/64 sensitivity threshold per second. It is unlikely you will need to change this. 5.2.4.25 Setting Max Presence Parameters The Max Presence function sets the maximum duration of a single vehicle detection.
  • Page 52 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 6. Select the direction by enabling direction detection on the channel that has the lag sensor when the vehicle is traveling in the direction to be detected. If you enable direction detection on both channels of a pair, the odd numbered channel will detect traffic traveling in one direction and the even numbered channel will detect traffic traveling in the other direction.
  • Page 53 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual The Call Duration setting determines how long the switch/call output for the channel having Directional Detection enabled will be ON after a vehicle traveling in the proper direction is detected. Note that vehicle presence cannot control the channel output as the detection sequence requires that the vehicle must have left the area of the lag sensor prior to final direction determination.
  • Page 54 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 2. Click Apply to send any settings changes to the vehicle detector. 5.2.4.28 Setting a Password Whenever the communication link to the Microloop has any potential to be accessed by an unauthorized user, it is wise to assign a password. When this is done, before any settings can be changed, the password will be requested by and must be provided to the C900-CS.
  • Page 55 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 5.2.4.29 Verifying Settings 1. Do a Read from Device. 2. Go through all the settings tabs on each of the icons with settings – Settings, Properties… tab under Traffic Data Binning, Log Setup tab under Real-Time Vehicle Logging - and check to ensure you have actually entered all the settings you desired to make.
  • Page 56 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 3. After allowing data to be gathered, press Stop. 4. Click Save to save the file. NOTE: A saved file is easy to view by opening it with a spreadsheet program. 5.2.4.32 Re-Verifying Operation & Examine Data at a Later Date It is recommended that data be retrieved from the unit and examined to ensure that it reflects the expected traffic pattern.

  • Page 57: Historical Traffic Data

    Communication Protocol Canoga Vehicle Detection System TM-2003-8 may be obtained by request from GTT Technical Service as listed on the back page of this document.] The data is displayed with the newest data as row 1. The data can be saved to a file, exported to a *.csv file (tab delimited) for easy import into other programs or printed.
  • Page 58 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual The Traffic Data Binning screen displays after the historical data is read from the C920 series unit. 52 – Troubleshooting...

  • Page 59: Analyzing Traffic Binning Data

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual Analyzing Traffic Binning Data The Traffic Data Binning data is displayed with the newest bin at the top line. The date and time the bin started are indicated with the count and occupancy for each channel checked under the Properties tab to have its traffic data recorded.

  • Page 60: Saving Traffic Binning Data

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual Saving Traffic Binning Data 1. Click on Save… to save the binning log to a file. 2. Browse to the directory of your choice and name the file. 3. Click Save. You may specify which suffix type is issued by typing in the suffix when you are naming the file.

  • Page 61: Exporting Traffic Binning Data To A File

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual Exporting Traffic Binning Data to a File 1. Go to File | Export to save a Traffic Data Binning data as a tab delimited text file. The Export Call History dialog box displays. 2.

  • Page 62: Importing Traffic Binning Data To Excel

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual Importing Traffic Binning Data to Excel 1. Start Excel. 2. Follow the described procedure rather than doing a File|Open operation. The described operation guarantees that there is an opportunity to specify “tab” as the delimiting character. Excel opens without an worksheet open.
  • Page 63 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual The Import Text File dialog box displays. 5. Browse to the directory where the *.csv file you wish to bring into Excel is, set Files of type to All Files (*.*), select the file and click on Import. The Text Import Wizard –...
  • Page 64 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual The Import Data dialog box displays. 9. Select the worksheet to put the data. The default is into the Existing worksheet. 10. Click OK. The data is now inserted into Excel. You can now perform any operations on the data that Excel can perform. 58 –...

  • Page 65: Printing Traffic Binning Data

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual Printing Traffic Binning Data 1. Click Print to print a Traffic Binning Data file from the C900-CS. The file prints to the currently selected Windows printer. File | Print Preview indicates what the printed report will look like. Historical Traffic Data –...
  • Page 66 Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 60 – Troubleshooting...

  • Page 67: Troubleshooting

    Canoga Option or call your local dealer. As another informational resource, see the Global Traffic Technologies Website, which you can access by pointing your Web browser to http://www.GTT.com. Eliminating Crosstalk Crosstalk occurs when a detection channel on one vehicle detector generates a noise signal on a channel of another vehicle detector.

  • Page 68: Low Sensor Response To Vehicles

    The lateral lane position of the Microloop is incorrect (in this case adjacent lane vehicle created detects are also likely). See GTT Microloop Installation Manual for further details. Eliminating the cause of the problem will correct the situation. 7.3.2 Loop A typical automobile will cause an inductance change in a loop of 3000 to 6000 nanohenries.

  • Page 69: Diagnostic Codes

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual Diagnostic Codes The C924X vehicle detectors have LED indicators on the front panel that display fault conditions. Table 8-1 lists the diagnostic codes that the LED indicators display when a fault occurs. There is one red Fault LED and one green Detect LED for each input channel.

  • Page 70: Product Description And Specifications

    Each Canoga™ C922, C924, C922E, and C924E vehicle detector is one component of the Canoga Traffic Sensing System matched-component system. Each of the other components described on this page is an integral part of this matched-component system. The Canoga Traffic Sensing System consists of the following GTT products: • Canoga™ C922E Vehicle detector •...

  • Page 71: Canoga™ 702 Non-Invasive Microloop

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 8.1.2 Canoga™ 702 Non-Invasive Microloop™ The Canoga 702 Non-invasive Microloop is a magneto-inductive transducer (changes magnetic field intensity into an inductor value). It is installed in 3-inch diameter horizontal conduit about 21 inches underneath the road surface.

  • Page 72: Dimensions

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual Lightning Resistance: Gas tube surge arrestors on transformer isolated loop inputs. Power Loss Protection: All settings are stored in non-volatile memory. System Connections: C924X - a 22 position, 44 contact gold over nickel-plated card-edge connector with contacts on 0.156 inch centers.

  • Page 73: Sensitivity

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 8.2.9 Sensitivity Table 8-1 Sensitivity Detection Thresholds Sensitivity Detect Threshold 1024 nH 512 nH 256 nH 128 nH 64 nH 32 nH 16 nH 8 nH Channel Off 8.2.10 Frequency per Channel Each channel of the C924X vehicle detectors has four frequency settings in software settings: •...

  • Page 74: Communication Ports

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual 8.2.12 Communication Ports Rear communication port: half duplex TIA-485 Front communication port: DTE (like a PC) configured, full duplex TIA-232 via 9-Pin DSUB (pins, female shell) Baud rates: 1200, 2400, 4800, 9600 (default), 19200, 38400 using 8 data bits, no parity bit, 1 stop bit. 8.2.13 Front Panel LED Indicators The front panel of the C924X vehicle detector is equipped with wide-angle LEDs indicating the unit’s...

  • Page 75: Sensitivity Operating Modes

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual See Section 3.3.3 Cable – Rear C92x TIA-485 Half Duplex Port to PC or Modem on page 8 for connection details. Both communication ports can be programmed for baud rates of 1200, 2400, 4800, 9600 (default), 19200 and 38400.

  • Page 76: Environmental Adaptation

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual When the sensor is a Microloop, selecting Pulse mode causes each vehicle, at the time it is detected, to produce a switch/call output pulse with ON time of Pulse (approximately 118 milliseconds). There is no rephase for pulse mode when the sensor is a Microloop.

  • Page 77: Historical Traffic Data Binning

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual Speed is calibrated by adjusting the setting for the distance between sensors (Leading Edge distance), e.g. increasing the length increases the measured speed and decreasing the length decreases the measured speed. Use this formula to calculate the correct spacing: Speed actual Lspace...

  • Page 78: Delay And Extension

    Series C400/C800/C900E/C900/940E/940 Serial Communication Protocol. It may be requested from GTT at the address or telephone number shown on the back cover of this document.) Then turn power to the card OFF and then ON. This will update Current Time. From this point on, the data reading system can read Current Time using the 5 command and then read the traffic monitoring card real- time clock using the q4 command.

  • Page 79: Recovery Method

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual Presence mode (output ON while vehicle is being sensed) is recommended for general detection applications. Pulse mode (output ON for Pulse Duration at the start of vehicle detection and, for loop sensor channels, channel is reinitialized if vehicle is continuously detected for Pulse Rephase Time or longer) is generally only used when a loop covers more than one lane, e.g.

  • Page 80: Direction Detection

    Canoga™ Vehicle Detectors Canoga™ C924X Series Installation Manual One sensor must be connected to the RED-GRN pair and the other sensor to the BLK-WHT pair. 8.2.26 Direction Detection Direction detection provides users of the vehicle detectors the ability to determine the direction a vehicle is traveling and count only the vehicles traveling in the specified direction.
  • Page 81 Canoga traffic sensing system components or Canoga vehicle detectors which have been (1) repaired or modified by persons not authorized by GTT; (2) subjected to misuse, neglect or accident; (3) damaged by extreme atmospheric or weather conditions; or (4) subject to events or use outside the normal or anticipated course.

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