Installation and Maintenance Manual IM 928-2 Group: Controls Part Number: 669207702 Date: March 2011 Supersedes: IM 928-1 MicroTech III Applied Terminal Systems BACnet MS/TP Communication Module NOTICE Use this manual to physically connect the BACnet Communication Module to various McQuay MicroTech III Unitary Controllers, and connect the Unitary Controller to your BACnet network. Connections and service to the MicroTech III Controller must be performed only by personnel knowledgeable in the operation of the equipment being controlled. 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 III control integration literature is available from your local McQuay International sales representative and www.mcquay.com. 2011 McQuay International
Contents Revision History... 3 Reference Documents... 3 Limited Warranty... 3 Notice... 3 GENERAL INFORMATION... 4 Hazard Identification Messages... 4 APPLICATION... 6 COMPONENT DATA... 6 Light Emitting Diodes (LEDs)... 6 BACnet MS/TP Network Connector (P3)... 6 BACnet Board-Mounted Switches... 6 BACnet Board-Mounted Plugs... 7 Address Switch... 7 8-Pin Header... 7 Jumper J2... 7 INSTALLATION... 8 Required Equipment... 8 Installing a new BACnet MS/TP Communication Module... 8 Replacing a BACnet MS/TP Communication Module... 8 INTEGRATION... 11 CONNECTING UNIT TO THE NETWORK... 11 Addressing and Establishing Communications... 11 Verifying the Network Address using the Wink Command... 12 Configuring the Unit Controller... 13 Restoring the BACnet Communication Module to Default Values... 13 Factory Configuration Settings for the BACnet Communication Module... 13 Field-Installed BACnet Communication Module... 13 Important Notes... 13 SERVICE INFORMATION... 14 TROUBLESHOOTING... 14 REPLACEMENT PARTS... 14 Figures Figure 1. MicroTech III BACnet Communication Module ----------------------------------------------------------------------------- 5 Figure 2. Building Automation System ---------------------------------------------------------------------------------------------------- 6 Figure 3. BACnet MS/TP Communication Module Mounted on the Unit Controller s Main Control Board ------------------- 9 Figure 4. BACnet MS/TP Connection Schematic Diagram----------------------------------------------------------------------------10 Figure 5. BACnet Communicaiton Module Address Switch (S3) Default Settings to OFF (Open)* ---------------------------12 Figure 6. BACnet Communicaiton Module Address Switch (S3 )- Example of Common Network Address Setting* ----------12 2 IM 928-2
Revision History IM 928 February 2009 Initial release IM 928-1 July 2009 Added PN to front cover, added sensors to Parts list. IM 928-2 March 2011 Added Wink command to Integraiton section. Removed typo from Instance Number. Added 19200 to Baud Rates supported. Removed references to MS/TP Network Number. Added the dip switch information on page 11-12 and Important Notes on page 13, indicating that APDU length cannot be adjusted through HyperTerminal and bringing up the configuration menu in number 5. Reference Documents Number Company Title Source ANSI/ASHRAE 135-2001 American Society of Heating, Refrigerating and Air-Conditioning Engineers A Data Communication Protocol for Building Automation and Control Networks ED 15103 McQuay International Protocol Information for MicroTech III Water Source Heat Pump Unit Controller, LonWorks and BACnet MS/TP ED 15115 McQuay International Protocol Implementation and Conformance Statement (PICS) for MicroTech III WSHP Unit controller OM 931 McQuay International MicroTech III Water Source Heat Pump Unit Controller Operation and Maintenance Manual ED 15135 McQuay International Protocol Information for MicroTech III Fan Coil Unit Controller, LonWorks and BACnet MS/TP ED 15134 McQuay International Protocol Implementation and Conformance Statement (PICS) for MicroTech III FCU Unit controller OM 1095 McQuay International MicroTech III Fan Coil Unit Controller Operation and Maintenance Manual www.ashrae.org www.mcquay.com www.mcquay.com www.mcquay.com www.mcquay.com www.mcquay.com www.mcquay.com Limited Warranty Consult your local McQuay Representative for warranty details. Refer to Form 933-43285Y. To find your local McQuay Representative, go to www.mcquay.com Notice 2011 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 product is appropriate for his or her application. The following are trademarks or registered trademarks of their respective companies. Windows from Microsoft Corporation; BACnet from ASHRAE; from Echelon Corporation; McQuay, MicroTech III, and Applied Terminal Systems from McQuay International. IM 928-2 3
General Information This manual contains the information you need to install the MicroTech III BACnet Communication Module to a McQuay MicroTech III Unit Controller and integrate it into the network. Hazard Identification Messages! DANGER Dangers indicate a hazardous situation which will result in death or serious injury if not avoided.! WARNING Warnings indicate potentially hazardous situations, which can result in property damage, severe personal injury, or death if not avoided.! CAUTION Cautions indicate potentially hazardous situations, which can result in personal injury or equipment damage if not avoided.! WARNING Electric shock hazard. Can cause personal injury or equipment damage. This equipment must be properly grounded. Connections and service to the MicroTech III Unit Controller must be performed only by personnel knowledgeable in the operation of the equipment being controlled.! 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. IM 928-2 4
Description The BACnet Communication Module incorporates a MicroTech III 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 mounts in the MicroTech III Unit Controller panel. The BACnet Communication Module is a rectangular printed circuit card with indicators (D1, D2, D3, & D4) on the top (see Figure 1). Each MicroTech III BACnet Communication Module is a printed circuit board that plugs on the top side of the MicroTech III unit controller baseboard. Figure 1 is an outline drawing with dimensions and major components of the MicroTech III BACnet Communication Module. Figure 1. MicroTech III BACnet Communication Module IM 928-2 5
Application The BACnet Communication Module connects the MicroTech III Unit Controller to the Building Automation System (BAS) on a BACnet Local Area Network. It is the interface adapter for the exchange of BACnet objects between the network and the unit controller. Figure 2 shows the BACnet Communication Module and MicroTech III Unit Controller integrated into a BAS. Refer to the appropriate MicroTech III Unit Controller Operation and Maintenance manual for details. Figure 2. Building Automation System BACnet MS/TP Communication Module BACnet MS/TP Network MicroTech III Control Board Component Data Figure 1 shows the location of the major components (described in the section below) of the MicroTech III BACnet Communication Module. Light Emitting Diodes (LEDs) The MicroTech III BACnet MS/TP communication module has four LEDs to indicate communication activity and status of the MicroTech III BACnet Communication Module. LED Function Description D1 Program Running Program main loop activity D2 Baseboard Message SPI Activity, LED on during baseboard message D3 MS/TP Transmit Flashes on when transmitting a MS/TP message D4 MS/TP Receive Flashes on when receiving a MS/TP message BACnet MS/TP Network Connector (P3) The P3 connector connects the MicroTech III BACnet MS/TP Communication Module to the BACnet MS/TP network. Pin Designation Function 1 + Non-inverting Input 2 -- Inverting Input 3 GND Reference used where isolated device require a reference 4 Shield Shield (isolated terminal for connection of shields) BACnet Board-Mounted Switches Switch Designation Function S1 Reset Used to reset the BACnet Communication Module S2 Default Used to reset the BACnet Communication Module to default parameters 6 IM 928-2
BACnet Board-Mounted Plugs Plugs Function J1 P2 P3 P4 Used in configuring the BACnet Communication Module Used to program the BACnet Communication Module BACnet MS/TP network connection point 8-pin header plug connects to Unit Controller Baseboard Address Switch The Address Switch, S3, must be set to the MAC address of the BACnet MS/TP Communication Module. The valid range is 0 to 127. 8-Pin Header P4 is an 8-pin connection port on the back side of the BACnet MS/TP Communication Module. It matches up to the 8-Pin header on the MicroTech III unit controller baseboard. Jumper J2 Jumper J2 is used only for internal development and testing purposes. IM 928-2 7
Installation A BACnet MS/TP Communication Module can be factory or field-installed (see the Replacement Parts section for details). The following section describes how to install a new BACnet MS/TP Communication Module or replace an existing module. It also describes how to connect the BACnet MS/TP Communication Module to a BACnet network. The BACnet MS/TP Communication Module mounts on connector pins and is held in place with four plastic locking standoffs. The BACnet MS/TP network connects to the BACnet MS/TP Communication Module at the network connector plug, P3. Required Equipment Field installation/replacement and network connection requires the following: A BACnet MS/TP Communication Module (included in kit) Stand-offs (included in kit) IM 928 (included in kit) Shielded, twisted pair pigtail wire and plug for network connection Installing a new BACnet MS/TP Communication Module! DANGER The terminals on the Water Source Heat Pump unit controller are high voltage. Disconnect power to avoid electrical shock potential, which will result in death or serious injury. 1. Disconnect power from the MicroTech III unit controller. 2. Remove the network cable plug-in connector terminal block in P3 (see Figure 3.) 3. Locate the four standoffs for the BACnet MS/TP Communication Module. 4. Install the four standoffs on the MicroTech III unit controller circuit board (see Figure 3). 5. Orient the BACnet MS/TP Communication Module printed circuit board so that the side with the components faces out and the connector socket can mate with the 8-Pin header on the MicroTech III unit controller circuit board. 6. Push the BACnet MS/TP Communication Module onto the connector pins and standoffs until you hear the faint click of the locking standoffs securing the communication module in place. Replacing a BACnet MS/TP Communication Module! DANGER The terminals on the Water Source Heat Pump unit controller are high voltage. Disconnect power to avoid electrical shock potential, which will result in death or serious injury. 1. Disconnect power from the MicroTech III unit controller. 2. Record the MAC Address set in Address Switch S3. 3. Remove the network cable plug-in connector terminal block P3 (see Figure 3.) 4. Locate the four standoffs for the BACnet MS/TP Communication Module from the unit controller main circuit board (see Figure 3.) 5. Depress the barb on one standoff and gently pull the corner of the BACnet MS/TP Communication Module over the barb. Do not bend the BACnet MS/TP Communication Module or misalign the connector pins. 6. Proceed to the other three corners, remove the BACnet MS/TP Communication Module from each standoff, and pull the module over the standoffs. 7. Gently lift the BACnet MS/TP Communication Module from the unit controller. 8 IM 928-2
8. Locate the empty connector pins and four standoffs for the BACnet MS/TP Communication Module in the unit controller (see Figure 3.) 9. Orient the BACnet MS/TP Communication Module printed circuit board so that the side with the components faces out and the connector socket can mate with the 8-Pin header on the MicroTech III unit controller circuit board. 10. Push the BACnet MS/TP Communication Module onto the connector pins and standoffs until you hear the faint click of the locking standoffs securing the communication module in place. Figure 3. BACnet MS/TP Communication Module Mounted on the Unit Controller s Main Control Board The BACnet module connects to the unit controller via 8- pin header and plug P4 on the back of the BACnet module. Test Jmpr 1 H5 1 1 H7 H6 H4 Config Jumpers JP8 JP7 JP6 JP5 JP4 JP3 JP2 PRG RUN BLUE Header Compressor Relay Omron G8P H3 HP1-2 HP1-1 JTAG PORT Pin 1 TB2 TB1 1 2 3 4 5 R W2 W1 Y2 Y1 G O C A Switched L1 No Connection TB3 U DANGER - HIGH VOLTAGE L1 NEUTRAL H2 L1-1 L1-2 L1-3 N1 N2 N3 N SL1 MTIIIUC-WSHP Base Controller Part # 668105601 E 1 JP1 H8 BLUE Header Standoff 1 S1 U5 1 D4 D3 D2 D1 J2 H9 YELLOW Header U2 U6 J1 U1 U4 U3 S2 T1 8 7 6 5 4 3 2 1 S3 ON P2 Standoff Shield Signal - Signal + P3 R W2 W1 Y2 Y1 G Test-1 24 C H1 IM 928-2 9
Figure 4. BACnet MS/TP Connection Schematic Diagram BACnet MS/TP Communication Module Shield GND - + GND or Reference is only used on three wire isolated systems that require a reference 10 IM 928-2
Integration Integrating the BACnet MS/TP Communication Module into a BAS involves three steps: 1. Connecting the unit controller to the network 2. Addressing and establishing communications with the unit controller 3. Configuring the unit controller Required Equipment Laptop with a serial port Serial terminal device application (such as Windows HyperTerminal) Null modem serial cable for setting the device instance number. Refer to the MicroTech III Unit Controller Protocol Information document, ED 15103 (available on www.mcquay.com) for details. Connecting Unit to the Network After inserting the BACnet Communication Module to the unit controller, connect the unit controller into the BACnet network following the three steps below: 1. Replace network cable plug in P3 (see Figure 3.) 2. Set the MAC Address in Address Switch S3. Note: A MAC (Media Access Control) address must be assigned to the BACnet MS/TP Communication Module. See your network administrator for assistance, if necessary. 3. Apply power to the unit controller. Note: You must maintain the polarity of the signal throughout the network. Always connect + to + and to. Addressing and Establishing Communications Once the unit controller with attached BACnet Communicaiton Module has been connected to the network, it is ready to be addressed so that communicaiton can be established. The steps below describe this process (see Table 2 for additional BACnet parameters and their default values). 1. Verify that the MAC address of the unit controller is unique on the BACnet network. 2. Change the default BACnet MS/TP Address of the unit controller. The BACnet MS/TP device address (MAC) Address of the unit controller in a BACnet MS/TP network is set in an eight-position dipswitch (i.e. address switch) on the BACnet MS/TP Communication Module. The address is physically set using eight binary switches. Bit 0 of the address corresponds to switch position 1 and bit 7 of the address corresponds to switch position 8. All MicroTech III unit controllers must be masters; therefore, bit 7 (switch 8) is always equal to 0 (open). Table 1summarizes the various ways to describe a dipswitch setting. A closed switch (switch ON) is a 1 and an open switch is a 0. Figure 5 shows the address switch as set from the factory with all switches OFF = open (i.e. in the up position). Table 2 summarizes the address values when the dipswitches are ON. Figure 6 shows an example of the dipswitch settings for a common network address. Note that he MAC address of the device must be unique on the BACnet network. Table 1. Explanation of Dipswitch States (ON or OFF) Address Switch State Description ON Closed = dipswitch in down position = 1 OFF Open = dipswitch in up position = 0 IM 928-2 11
Figure 5. BACnet Communicaiton Module Address Switch (S3) Default Settings to OFF (Open)* * Note that the switches on the actual BACnet Communication Module are numbered: 8, 7, 6, 5, 4, 3, 2, 1 from left to right when the module is attached on the unit controller baseboard (as shown in Figures 1 and 3). Table 2. Address Switch Values When Switch is ON (Closed) Switch # Value Value When Switch is ON = Closed 1 2 to the zero power 1 2 2 to the 1 st power 2 3 2 to the 2 nd power 4 4 2 to the 3 rd power 8 5 2 to the 4 th power 16 6 2 to the 5 th power 32 7 2 to the 6 th power 64 8 Must always be in the up (OFF) position N/A Figure 6 shows an example of a typical address setting. The digital switch positions as read from right to left are: 01001100. This provides an address of 76 as illustrated below. Figure 6. BACnet Communicaiton Module Address Switch (S3 )- Example of Common Network Address Setting* 0+ 64 + 0 + 0 + 8 + 4 + 0 + 0 = 76 * Note that the switches on the actual BACnet Communication Module are numbered: 8, 7, 6, 5, 4, 3, 2, 1 from left to right when the module is attached on the unit controller baseboard (as shown in Figures 1 and 3). 3. Cycle power to the unit controller. Note: After you set the address in the switches, you must cycle power (turn the unit controller off and then on again) in order for the new address to take effect. 4. Change the data transmission rate, if necessary. The D4 LED flickers when the module is receiving data from the network, and the D3 LED flickers when the communication module is sending data to the network. See Figure 1 for details. 5. Verify the network address using the Wink Command process as described below (optional). Verifying the Network Address using the Wink Command The BACnet Communication Module implements a unit identification mode command to the unit controller by using the BACnet ReinitializeDevice request with a password of wink (all lower case). The Wink unit identification function allows verification of an individual unit network address without opening the unit access panels. The compressor shuts off during this period and the Minimum Compressor Off Countdown Timer must expire before the compressor is allowed to run again. The Wink command can be used during all operating and non-operating modes (ex. Alarms) except for Brownout Mode. Upon receiving a wink command from a network management node, the unit controller exhibits the following identification sequence (all occur simultaneously): 12 IM 928-2
Room Sensor Status LED: Flashes (on 0.5 sec, off 0.5 sec) for 15 seconds. Fan: The fan turns off for 5 seconds, turns on for 5 seconds, then off again for 5 seconds. Compressor: The compressor turns off for a minimum of 15 seconds. Configuring the Unit Controller All unit controllers are loaded with software and configured at the factory for standalone operation. The unit is ready to operate with default setpoint parameters that can be changed via the BAS (building automation system). Refer to the Protocol Document, ED 15103 (available on www.mcquay.com) for descriptions of the available BACnet objects. Restoring the BACnet Communication Module to Default Values Setting the BACnet Communicaiton Module back to its default configuration requires the following steps: 1. Press and hold the DEFAULT switch S2. While holding this switch, press and release the RESET switch S1. The LEDs should flash once, turn off and turn on one after another. 2. Release the DEFAULT switch S2 (once all four LEDs are steady) to restore the BACnet Communicaiton Module to default values. Factory Configuration Settings for the BACnet Communication Module If the unit controller is equipped with a factory-installed BACnet MS/TP Communication Module, the unit controller is preconfigured with the values shown in Table 3. Field-Installed BACnet Communication Module A BACnet MS/TP Communication Module can be added to a unit controller in the field for these reasons: The unit did not originally ship with a communication module. The unit originally shipped with a LONWORKS Communication Module but requires replacement with a BACnet Communication Module. Table 3. Default Communication Setup Parameter Settings Parameter Name BACnet MSTP MSTP MAC Address 1 Switch Setting MSTP Baud Rate 38400 (9600, 19200, 38400 and 76800) Device Instance Number 2 300 Max APDU Length 3 480 Device Object Name 4 WSHP = MTIIIUC_WSHP_0000300 FCU = MTIIIUC_FCU_0000300 Important Notes 1. The MAC address is set by switch setting on the BACnet MS/TP Communication Module. 2. The device instance number is factory set at 300. This number must be unique on the network and must be set in the field. 3. The Max APDU Length parameter should not be set higher than 480 for BACnet MS/TP (this value can not be adjusted through the Configuration Menu). 4. The Device Object Name is set to factory default. This must be unique on the network and must be set in the field. 5. You need a computer with a serial port, and serial terminal device application (such as Windows HyperTerminal), and a serial null modem cable for setting the device instance number using the Configuration Menu. Refer to the Protocol Information Document, ED 15103 (available on www.mcquay.com). IM 928-2 13
Service Information Troubleshooting If you can control the unit from the thermostat, but you are not able to communicate with unit via the network: Verify the network (bus) wiring. Verify that the Transmit LED (D3) is flickering. Verify that the MS/TP MAC address (S3) is set in the 0-127 range (Master). Check the network communication parameters in the unit controller for proper settings. If the BACnet Communication Module still does not respond, contact the McQuay Controls Customer Support group at 866-4McQuay (866-462-7829). Replacement Parts Contact the McQuay Parts group at 763-553-5451 for replacement parts related to the BACnet MS/TP Communication Module. McQuay does not supply the network connector. Description MicroTech III BACnet MS/TP Communication Module Field Installation Kit Kit includes the following: MicroTech III BACnet MS/TP Communication Module Four stand-offs Discharge air temperature sensor, return air temperature sensor, and leaving water temperature sensor assembly IM 928 Part Number 107293071 668994101 MicroTech III BACnet MS/TP Communication Module Replacement Parts Kit Kit includes the following: MicroTech III BACnet MS/TP Communication Module Four stand-offs IM 928 MicroTech III BACnet MS/TP Communication Module 668105901 Temperature Sensor Assembly Assembly includes the following: Discharge air temperature sensor Return air temperature sensor Leaving water temperature sensor 910101540 This document contains the most current product information as of this printing. For the most current product information, please go to www.mcquay.com. www.mcquay.com 800-432-1342 14 IM 928-2