MicroTech II McQuay Maverick II Rooftop Unit Controller BACnet Communication Module (MS/TP)

Transcription

1 Installation and Maintenance Manual IM 852 Group: Controls Part Number: IM 852 Date: June 2007 Supercedes: New MicroTech II McQuay Maverick II Rooftop Unit Controller BACnet Communication Module (MS/TP) Commercial Packaged Rooftop Cooling and Heating Unit, 30 to 50 tons NOTICE Use this manual to physically install the McQuay MicroTech II Communication Module into the rooftop unit controller and connect the rooftop unit controller to your network. Use the appropriate McQuay Engineering Data (ED), known as the Protocol Information document, to integrate the unit into your network. The Protocol Information document contains addressing details, BACnet protocol information, and a list of the data points available to the network. See the Reference Documents section of this manual for Protocol Information document numbers. MicroTech II control integration literature is available from your local McQuay International sales representative and McQuay International

2 Contents Figures Figures... 2 Revision History... 3 Reference Documents... 3 Limited Warranty... 3 Introduction... 4 Recognize Safety Symbols, Words and Labels... 4 General Information... 5 Description... 5 Application... 5 Component Data... 6 Light Emitting Diodes (LEDs)... 6 BACnet Network Connector Pin Header... 7 P1, P2 and P3 Jumpers... 7 Pushbutton... 7 Installation... 8 Mounting... 8 Contents of the BACnet Communication Module Kit... 8 Installing a new BACnet Communication Module... 8 Mounting a BACnet Communication Module... 8 Replacing an Existing BACnet Communication Module... 9 Meaning of the Jumpers Integration Access to Properties Configuring the Unit Controller Network Connection BACnet MS/TP Addressing Configuring the BACnet Communication Module Configuring the BACnet Communication Module using the Keypad/Display Configuring the BACnet Communication Module using the Configuration Tool Restarting and Resetting the BACnet Communication Module Restarting the BACnet Communication Module Resetting Factory Defaults when the Rooftop is Off: Resetting Factory Defaults when the Rooftop is On: Service Information Test Procedures Parts List Installation Kit Appendix A: Hexadecimal Conversion Table Figure 1. BACnet Communication Module External Connectors (Top View)... 6 Figure 2. Serial Card Slot in Unit Controller Figure 3. Serial Card Slot Detail IM 852

3 Revision History IM 852 June 2007 Initial release Reference Documents Number Company Title Source ANSI/ASHRAE American Society of BACnet A Data Communication Protocol for Building Heating, Refrigerating and Air-Conditioning Engineers Automation and Control Networks UM 855 McQuay International BACnet Configuration Tool for Maverick II Rooftop Unit Controllers IM/OM 843 McQuay International MicroTech II Commercial Packaged Rooftop Unit Controls, Unit Controller (DAC, SCC) ED McQuay International Maverick II Rooftop Unit Controller Protocol Information, BACnet and LONWORKS Networks Limited Warranty Consult your local McQuay Representative for warranty details. Refer to Form Y. To find your local McQuay Representative, go to Notice Copyright 2007 McQuay International, Minneapolis MN. All rights reserved throughout the world. McQuay International reserves the right to change any information contained herein without prior notice. The user is responsible for determining whether this software is appropriate for his or her application. The following are tradenames or registered trademarks of their respective companies: BACnet from the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.; LONWORKS and LONMARK from Echelon, Inc.; Windows from Microsoft Corporation; McQuay and MicroTech II from McQuay International. IM 852 3

4 Introduction Recognize Safety Symbols, Words and Labels The following symbols and labels are used throughout this manual to indicate immediate or potential hazards. It is the owner and installer s responsibility to read and comply with all safety information and instructions accompanying these symbols. Failure to heed safety information increases the risk of property damage and/or product damage, serious personal injury or death. Improper installation, operation and maintenance can void the warranty.! CAUTION Hazards or unsafe practice CAN result in property damage, product damage, severe personal injury and or death. NOTICE Hazards or unsafe practices which CAN result in property damage, product damage, and or personal injury. 4 IM 852

5 General Information This manual contains the information you need to install the BACnet Communication Module, incorporate it into the network, and maintain it.! WARNING Electric shock hazard. Can cause personal injury or equipment damage. This equipment must be properly grounded. Only personnel that are knowledgeable in the operation of the equipment being controlled must perform connections and service to the Maverick Rooftop Unit Controller.! CAUTION Static sensitive components. Can cause equipment damage. Discharge any static electrical charge by touching the bare metal inside the control panel before performing any service work. Never unplug cables, circuit board terminal blocks, or power plugs while power is applied to the panel. NOTICE This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with this instruction manual, may cause interference to radio communications. It has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his or her own expense. McQuay International disclaims any liability resulting from any interference or for the correction thereof. Description Application The MicroTech II BACnet Communication Module incorporates a Maverick II Rooftop Unit Controller into a BACnet local area network (LAN). It supports the BACnet MS/TP (EIA 485) data link layer (physical layer.) The BACnet Communication Module is a printed circuit board that mounts in the Maverick Rooftop Unit Controller panel. Figure 2 shows a drawing of the BACnet Communication Module itself. The BACnet Communication Module connects the Maverick Rooftop Unit Controller to a building automation system (BAS) on a BACnet local area network. It is the interface for the exchange of BACnet objects between the network and the unit controller. IM 852 5

6 Component Data Figure 1 shows the external connectors of the BACnet Communication Module. Figure 1. BACnet Communication Module External Connectors (Top View) Status LEDs Jumpers (P1, P2 & P3) RS485 LEDs Network Connector Pushbutto GND Pin Header Light Emitting Diodes (LEDs) The BACnet Communication Module has a Status LED and an RS485 LED to indicate communication activity and status of the BACnet Communication Module. These indicators are visible even when the module is installed in the Maverick Rooftop Unit Controller. Status LED The status LED indicates the communication state between the BACnet Communication Module and the Maverick Rooftop Unit Controller. During power-up, the status LED will show the following sequence: Off 2 seconds after startup: quick flashing red-green 5 seconds after startup: steady green 50 seconds after startup: regularly flashing (see Communication State with the BACnet Communication Module section below for color descriptions) Communication State with the BACnet Communication Module After startup has completed, the Status LED will regularly blink to show the communication status between the BACnet Communication Module and the Maverick Rooftop Unit Controller. The table below describes the different color and states. Status LED Color Quick Flashing Green Slow Flashing Red Green/Red Flashing Meaning Communication has been established between the BACnet Communication Module and the Maverick Rooftop Unit Controller. Communication has not been established between the BACnet Communication Module and the Maverick Rooftop Unit Controller. BACnet Communication Module detects an error or a temporary answer fault from the Maverick Rooftop Unit Controller. 6 IM 852

7 RS485 LEDs The RS485 LEDs shows the communication status between the BACnet Communication Module and the BACnet MS/TP network. The table below describes the status of the RS485 LEDs. RS 485 LED Color Green with occasional red flashes Green and red ON together Meaning Communication is established. The BACnet MS/TP definition is as follows: Green ON: BACnet Communication Module keeps the token Green OFF: BACnet Communication Module does not keep the token Red ON: Poll-For-Master; search for a master to pass the token to Communication is not established. The BACnet MS/TP definition is that the communication status is in a state of continuous Poll-For-Master. Possible explanations for this are as follows: Connection error No network is found due to: Electrical connection error Communication settings are not compatible with the other network devices that are connected to the network BACnet Network Connector An RS485 connector connects the BACnet Communication Module to the MS/TP Network. 8-Pin Header The 8-pin header connects the Maverick Rooftop Unit Controller to the BACnet Communication Module. P1, P2 and P3 Jumpers Jumpers P1, P2 and P3 are located inside the front opening of the cover. Jumper P1 adds a 510-ohm polarization resistance between the negative data line (-) and GND Jumper P2 adds a 120-ohm terminal resistance between the two data lines (+) and (-) Jumper 3 adds a 510-ohm polarization resistance between the positive data line (+) and the +5Vdc internal voltage Refer to the Mounting a BACnet Communication Module section for information on how to set these jumpers. Pushbutton Note: The pushbutton is used to either reboot the BACnet Communication Module or temporarily restore the factory defaults. Changing the Units= property from the Rooftop unit controller keypad/display will cause the present value to be converted to the correct units. You must have this value set to Metric if the Metric CSV file is loaded into your BACnet Communication Module or set to English if the English comma separated value file is loaded into your BACnet Communication Module. Record all setpoint values before changing the Units= property since this will cause all setpoints in the Rooftop to return to their default values. Refer to the section titled Restarting and Resetting the BACnet Communication Module for more information on using the pushbutton. IM 852 7

8 Installation Mounting The BACnet Communication Module is available for field installation only; it is not a factoryinstalled option. The BACnet Communication Module kit may be ordered via McQuayTools or McQuay Parts. See the Installation Kit section on page 16 for additional information.! CAUTION Electrostatic discharge hazard. Can cause equipment damage. This equipment contains sensitive electronic components that may be damaged by electrostatic discharge from your hands. Before you handle a communications module, you need to touch a grounded object, such as the metal enclosure, in order to discharge the electrostatic potential in your body. Contents of the BACnet Communication Module Kit The following is the list of items included in the field-installed kit: The BACnet Communication Module circuit board Plastic cover for the module Three jumpers Plug-in connector Ferrite-lined plastic enclosure (for noise reduction, if desired) Installing a new BACnet Communication Module Install a BACnet Communication Module on the Maverick Rooftop Unit Controller to incorporate it into an existing BACnet network. Mounting a BACnet Communication Module To mount a BACnet Communication Module 1. Remove power from the Maverick Rooftop Unit Controller. 2. Locate the Serial Card slot on the Maverick Rooftop Unit Controller (see Figure 3). 3. Remove the cover from the Serial Card slot if it has not already been removed. Use a small screwdriver to carefully pry the cover off from one end. 4. Grasp the BACnet Communication Module, with the network connector on the underside. The 8- pin header must mate to the 8-pin plug in the Maverick Rooftop Unit Controller. The plug has a guide on each end to direct it into the mating guide on the BACnet Communication Module header. Figure 4 details the Serial Card slot with the 8-pin plug that mates to the header on the BACnet Communication Module. Note: This operation relies more on fitting the BACnet Communication Module into the connector than seeing the connectors mate. 5. Insert the BACnet Communication Module, pointing up, into the slot, rolling it into a level position as you move it into the slot. 6. Keeping the BACnet Communication Module level, move it in the slot until you feel the connectors line up. 8 IM 852

9 7. When you feel the connectors align, press the BACnet Communication Module into the plug. Verify that the module is firmly connected. 8. Install the P1, P2 and P3 jumpers if necessary. This step is only required if it is the first or last unit on the network. Do not insert the jumpers on intermediate units. 9. Insert the plug-in connector to the BACnet Communication Module. 10. Mount the plastic cover provided with the BACnet Communication Module kit. 11. (Optional) Install the ferrite-lined plastic enclosure on the network cable for noise reduction. Replacing an Existing BACnet Communication Module To replace a BACnet Communication Module 1. Remove power from the Maverick Rooftop Unit Controller. 2. Locate the Serial Card slot on the Maverick Rooftop Unit Controller (see Figure 3). 3. Pull the network cable connector from the BACnet Communication Module. 4. Remove the cover from the Serial Card slot. Use a small screwdriver to carefully pry it off from one end. 5. Grasp the BACnet Communication Module and gently pull it from the Maverick Rooftop Unit Controller. 6. Grasp the BACnet Communication Module, with the network connector on the underside. The 8- pin header must mate to the 8-pin plug in the Maverick Rooftop Unit Controller. The plug has a guide on each end to direct the BACnet Communication Module into the mating guide on the 8- pin plug. Figure 4 shows a detail of the Serial Card slot with the 8-pin plug that mates to the header on the BACnet Communication Module. Note: This operation relies more on fitting rather than seeing the connectors mate. 7. Insert the BACnet Communication Module, pointing up, into the slot, rolling it into a level position as you move it into the slot. 8. Keeping the BACnet Communication Module level, move it in the slot until you feel the connectors line up. 9. When you feel the connectors align, press the BACnet Communication Module into the connector. Verify that the BACnet Communication Module is firmly connected. 12. Install the P1, P2 and P3 jumpers if necessary. This step is only required if it is the first or last unit on the network. Do not insert the jumpers on intermediate units. 13. Insert the plug-in connector to the BACnet Communication Module. 14. Replace the cover on the Serial Card slot. Slip the cover over the network connector plug. 15. Insert the network cable connector into the BACnet Communication Module. 16. (Optional) Install the ferrite-lined plastic enclosure on the network cable for noise reduction. IM 852 9

10 Air Conditioning Figure 2. Serial Card Slot in Unit Controller Serial Card Slot Figure 3. Serial Card Slot Detail 8-Pin Connector for Serial Card J4 J5 VG VG0 Y1 Y2 Y3 Y4 ID1 ID2 ID3 ID4 ID15H ID5 ID6 ID7 J19 ID15 IDC15 Meaning of the Jumpers Jumpers P1, P2 and P3 are located inside the front opening of the cover. Jumper P1 adds a 510-ohm polarization resistance between the negative data line (-) and GND. Jumper P2 adds a 120-ohm terminal resistance between the two data lines (+) and (-). Jumper P3 adds a 510-ohm polarization resistance between the positive data line (+) and the +5Vdc internal voltage. Only install the three jumpers to the unit at the start of the network and the unit at the end of the network. Do not insert the jumpers on the intermediate units. To help reduce noise on the MS/TP line, add the ferrite-lined plastic enclosure, supplied with the BACnet Communication Module kit, to the network cable. 10 IM 852

11 Integration Access to Properties It is possible to access a property in one of two ways: 1. Specify the object identifier along with the property identifier. 2. Specify the object name along with the property identifier. For additional information, refer to the Maverick Rooftop Unit Controller Protocol Information document (ED 15102). Configuring the Unit Controller The Maverick Rooftop Unit Controller and optional BACnet Communication Module are designed, programmed, and configured at the factory. The unit is ready to operate with the default parameter values in the unit controller after you change the default parameters. Refer to the appropriate Maverick Rooftop Unit Controller Operation Manual (OM 848 or OM 849) for default values and keypad operating instructions. Refer to ED for descriptions of the available BACnet variables. Network Connection BACnet MS/TP Addressing The BACnet MS/TP Media Access Control (MAC) address is a variable one-octet address that must be set during the BACnet Communication Module configuration. The MAC address must be unique to the MS/TP network and have a valid range of There are certain parameters that must be set properly to verify communication between the Maverick Rooftop Unit Controller and the MS/TP network. Table 3 provides details about these addressing parameters. See your system integrator for additional information regarding proper BACnet MS/TP addressing. Configuring the BACnet Communication Module The BACnet Communication Module can be configured using the keypad/display on Maverick Rooftop Unit Controller or by using the BACnet Communication Module Configuration Tool. To use the keypad/display, refer to the Configuring the BACnet Communication Module using the Keypad/Display section of this document. To use the BACnet Communication Module Configuration Tool, refer to the section of this document titled Configuring the BACnet Communication Module using the Configuration Tool. Configuring the BACnet Communication Module using the Keypad/Display To Configure using the Keypad/Display: 1. Navigate to the display menu on the Maverick Rooftop Unit Controller by pressing the upper left keypad button (with the left arrow icon) and lower left keypad button (with the down arrow icon) simultaneously. 2. If prompted for a password, enter: Navigate to the Network Config Menu (press the button with the right arrow icon once.). 4. In the Type = field, select BACnet MS/TP. 5. Change Configure BACnet? to Yes. 6. Adjust the appropriate network parameters. IM

12 Note: The BACnet Communication Module data transmission rate is set to a factory default of bps. Skip Step 7 if this is your desired transmission rate. 7. To install the BACnet Communication Module on an MS/TP network, set the Baud Rate to the desired network data transmission rate (see Changing the MS/TP Data Transmission Rate section.). 8. Set Configuration OK? to Yes. Doing so will write the variables to the BACnet Communication Module. 9. Cycle power to the Maverick Rooftop Unit Controller. Changing the MS/TP Data Transmission Rate The options for baud rate (in bps) include: 9600, 19200, 38400, and The factory default baud rate is bps.! WARNING Electric shock hazard. Can cause personal injury or equipment damage. This equipment has exposed electrical connections inside BACnet Communication Module. Only personnel that are knowledgeable in the operation of this equipment must perform connections and service to the BACnet Communication Module. Changing the MS/TP Data Transmission Rate: 1. Navigate to the display menu on the MicroTech II Maverick II Rooftop Unit Controller by pressing the upper left keypad button and lower left keypad button (with the down arrow icon) simultaneously. 2. If prompted for a password, enter: Navigate to the Network Config Menu (press the button with the right arrow icon once.) 4. Change Configure BACnet? to Yes. 5. Change the Baud Rate. 6. Set Configuration OK? to Yes. Doing so will write the variables to the BACnet Communication Module. 7. Cycle power to the Maverick Rooftop Unit Controller. Configurable Parameters Table 3 defines the network parameters of the BACnet Communication Module that must be set correctly, using either the keypad/display or the Configuration Tool, to establish communication between the Maverick Rooftop Unit Controller Unit and the BAS. Change parameters as required for your network. For additional information on using the keypad/display, refer to operating manuals OM 848 and OM IM 852

13 Table 3. Network Configuration Menu Parameter Value (Range)/Definition Initial Value/Note Type 1 (Lon, BACnet IP, BACnet None Ethernet and BACnet MS/TP)/This variable defines the type of network that is connected. Set this variable to BACnet MS/TP. Configure BACnet? 1 This enables or disables the menu containing the BACnet setup parameters. This menu item will be hidden if the No./This must be set to Yes to enable the rest of the keypad containing the BACnet parameters. network Type is something other than BACnet. Baud Rate / Data transfer speed MS/TP Station Address 0-127/ This is the MS/TP address of the BACnet Communication Module. Max Master 0-127/ This variable specifies the highest possible address for master nodes and shall be less than or equal to 127. Max Info Frames 0-255/ This variable specifies the maximum number of information frames the BACnet Communication Module may send before it must pass the token. Device Instance /Device Instance of the BACnet Communication Module Configuration OK? 1 Setting this to Yes writes all the BACnet setup variables to the BACnet card. Make sure all variables are set correctly. 1 Parameter only available via the keypad/display. 0/ Each device on the BACnet network must have a unique MS/TP address /This must be unique throughout the entire BACnet network. No Configuring the BACnet Communication Module using the Configuration Tool The BACnet Communication Module can also be configured using the BACnet Communication Module Configuration Tool. Use the Configuration Tool in place of the keypad/display to modify BACnet setup parameters. The Configuration Tool is also required for downloading new firmware or a metric CSV (Comma-Separated) file. The CSV file is needed if the BAS requires metric units to be displayed. The Configuration Tool and the CSV files are available as free downloads on the II Controls/Application Software page. Refer to the BACnet Communication Module Configuration Tool for Maverick Rooftop Unit Controller User Manual (UM 855) for complete details. Note: The CSV file maps all variables from the Maverick Rooftop Unit Controller to the BACnet network. This mapping includes the type of units that are displayed (in either English or Metric). Do not modify this file. IM

14 Note: Changing the Units = property from the Rooftop unit controller keypad/display will cause the present value to be converted to the correct units. You must have this value set to Metric if the Metric CSV file is loaded into your BACnet Communication Module or set to English if the English comma separated value file is loaded into your BACnet Communication Module. Record all setpoint values before changing the Units = property since this will cause all setpoints in the Maverick Rooftop Unit Controller to return to their default values. Restarting and Resetting the BACnet Communication Module The BACnet Communication Module contains a pushbutton that can be used to restart the BACnet Communication Module or to recall the factory configuration. See Table 4 for the list of parameters that are reset using the pushbutton. Restarting the BACnet Communication Module 1. Verify that the BACnet Communication Module is installed correctly with the Status LEDs flashing continuously. 2. Hold the pushbutton for more than 5 seconds and no more than 10 seconds. 3. Around 10 seconds after releasing the button, the Status LEDs will stop flashing and 15 seconds later the BACnet Communication Module will restart (Status LEDs quickly flashing red-greenred-green ). Resetting Factory Defaults when the Rooftop is Off: 1. Unplug network connections from the BACnet Communication Module. 2. Hold down the pushbutton on the BACnet Communication Module. 3. Apply power to the Maverick Rooftop Unit Controller. 4. Keep the pushbutton pressed for at least 20 seconds. 5. Release the pushbutton once the Status LEDs start to blink red. 6. After three slow red blinks, the LEDs will become green, and then to indicate the command has been successful, it will rapidly blink dark red three times. Resetting Factory Defaults when the Rooftop is On: 1. Unplug network connections from the BACnet Communication Module. 2. Press the pushbutton for more than five seconds and no more than ten seconds. 3. Release the pushbutton. 4. After another 5 seconds, press and hold the pushbutton again. 5. The status LEDs will stop flashing and then it will flash red quickly. 6. Release the pushbutton when the status LEDs start flashing red slowly. 7. After three slow red blinks, the LEDs will become green, and then, to indicate the command has been successful, it will rapidly blink dark red three times. Note: After successfully using the pushbutton, the BACnet Communication Module only retains the factory-specified default parameters until the next reboot is performed. The BACnet Communication Module will implement the latest user-specified parameters after a reboot has been performed without the pushbutton being pressed. The Rooftop Unit Controller Keypad will retain the parameter values before the pushbutton was pressed even though the factory defaults are actually being used. Table 4 defines the five parameters that are reset to factory defaults when the pushbutton on the BACnet Communication Module has been pressed. 14 IM 852

15 Table 4: Network Parameters that are reset using the Pushbutton Parameter Name Factory Default (Range)/Description Device Instance 3001 ( )/A number that uniquely identifies a device on the BACnet network. MS/TP Station Address 0 (0-127)/A number that differentiates the units in the BACnet MS/TP network. Max Masters 127 (0-127)/The maximum number of information packages exchanged, above which the Master unit will give up control (Token) of the network to another Master unit. Max Info Frames 20 (0-255)/ The Max Master value should match the largest MS/TP Station Address value to provide maximum system efficiency. Baud Rate (9600, 19200, 38400, 76800)/Data transfer speed. IM

16 Service Information Test Procedures Parts List If you can control the unit from its keypad, but you are not able to communicate with unit via the network: Check the network wiring Check the network parameters and verify that they are correct and that there are no duplicate devices on the network Check communications If the BACnet Communication Module still does not respond, contact the McQuay Controls Customer Support group at 866-4MCQUAY ( ). Installation Kit Description Part Number MicroTech II BACnet Communication Module-MS/TP kit IM 852

17 Appendix A: Hexadecimal Conversion Table Dec Hex Dec Hex Dec Hex Dec Hex A 42 2A 74 4A 106 6A 11 B 43 2B 75 4B 107 6B 12 C 44 2C 76 4C 108 6C 13 D 45 2D 77 4D 109 6D 14 E 46 2E 78 4E 110 6E 15 F 47 2F 79 4F 111 6F A 58 3A 90 5A 122 7A 27 1B 59 3B 91 5B 123 7B 28 1C 60 3C 92 5C 124 7C 29 1D 61 3D 93 5D 125 7D 30 1E 62 3E 94 5E 126 7E 31 1F 63 3F 95 5F 127 7F IM

18 This document contains the most current product information as of this printing. For the most current product information, please go to All McQuay equipment is sold pursuant to McQuay s Standard Terms and Conditions of Sale and Limited Warranty. (800)