MPC MULTIPROTOCOL DDC CONTROLS Application, Operation .
MPC MULTIPROTOCOL DDC CONTROLSApplication, Operation & Maintenance97B0031N01Revised: March 7, 2017
THE SMART SOLUTION FOR ENERGY EFFICIENCYMPC MultiProtoCol DDC ControlsRevised: March 7, 2017Table of ContentsMPC Controller Overview .3Bacview6 Service Tool and Addressing .10Operation Overview .15Water-to-Air Variable Points List .17Application and Feature Setup .22Water-to-Water Variable Points List .23MPC Wall Sensors .25Frequently Asked Questions (FAQs) .32Revision History .342
THE SMART SOLUTION FOR ENERGY EFFICIENCYMPC MultiProtoCol DDC ControlsRevised:March 7, 2017MPC Controller OverviewThe MultiProtoCol (MPC) Heat Pump controller is a dualpurpose controller: it contains the logic to perform as anadvanced customizable thermostat when combined witha wall sensor and is designed to allow the integration ofwater source heat pump equipment into DDC systems.The MPC Controller has the ability to communicatethrough a choice of four widely used protocols: BACnetMS/TP, Johnson Controls N2, and Modbus and LonWorks.The protocol of choice for the particular system isselected by simply configuring DIP switches on the MPCController with the exception of LonWorks. The LonWorksoption requires an additional Lon option card (LOC).This flexibility allows one controller, the MPC, to be usedin a multitude of buildings which use any of these fourcommon protocols.The MPC serves as a node of information processingbetween the heat pump and the DDC network. The MPCcommands the heat pump to heat and cool based uponsensor inputs. The MPC then monitors operation of theheat pump and communicates the operating parametersto the DDC network. The MPC will alwayswork in conjunction with a CXM, DXM or DXM2 controller,which also resides in the heat pump control box. TheMPC has factory pre-loaded application software whichallows optimal control of the heat pump equipment. TheMPC can run in stand-alone operation as well as with theDDC network. Therefore, when the heat pump arrives atthe jobsite with the factory installed MPC Controller, theheat pump is ready to run stand-alone and then can beconnected to the DDC network at any time.Communications: Multi-Protocol communicationsprovides DDCsystem flexibility. Supports native BACnet MS/TP communications (theASHRAE standard protocol for interoperability). Supports Johnson Controls N2 communications (forintegration into Johnson Controls Metasys DDC systems). Supports Modbus communications for integration intoModbus DDC networks. Supports LonWorks communications. Requires LOCdaughter card (PN-17B0012N08 Four baud rate levels offer flexible communicationsspeeds of 9600, 19.2k, 38.4k, or 76.8k baud. High speed 16-bit Hitachi Processor with 1024 kBytesRAM and 4096 kBytes Flash Memory which allows, ifneeded, MPC programs to be upgraded and easilydownloaded in the field. Removable field wiring connectors for ease of fieldservice. Engineered for quality and reliability Enables building operators to easily upgrade firmwarein the future.Features & BenefitsSystem Controls: In conjunction with the wall sensors, theMPC offers features such as: Room temperature sensingLocal setpoint adjustmentLocal override into Occupied ModeLED for alarm statusLED for fault status typeHeat pump reset at the wall sensorDigital room temperature displayInformation from the wall sensors can then be reportedto the DDC network system. Has the ability to add various sensors such asoccupancy sensors.3
THE SMART SOLUTION FOR ENERGY EFFICIENCYMPC MultiProtoCol DDC ControlsRevised: March 7, 20174
THE SMART SOLUTION FOR ENERGY EFFICIENCYMPC MultiProtoCol DDC ControlsRevised:March 7, 2017Power:24VAC 10%, 50 or 60Hz, 15VA max. power consumption.Size:5-1/16” [129mm] width x 5-11/16” [144mm] height x 1-1/2” [38mm] (minimum panel depth).Housing:Rugged GE C2905HG Cycoloy plastic housing (complies with UL 94 V-O).Environmental:0-130 F (-17.8 to 54.4 C), 10% to 95% non-condensing.Protection:Surge & transient protection circuitry for the power and I/O. Optical isolation forcommunications port.Processor/Memory:High speed 16-bit Hitachi Processor with 1024kB RAM and 4096kB Flash Memory.LED Indicators:Individual LEDs for digital outputs, power, run, error, transmit, and receive.Compliance:UL916; FCC Part 15, Subpart B, Class A; ICES, Class A; EN55022, Class A;IEC61000-6-1; RoHS complaint, WEEE Complaint; BTL listedI/O Point Count:5 digital outputs (on-board relays rated for 1A resistive at 24VAC).6 universal inputs (IN-1 and IN-2 are jumper selectable for dry contact or 0-5VDC).1 analog wall sensor port for non-communicating (Lstat) wall sensors.1 digital wall sensor port for communicating (Rnet) wall sensors.Communications:EIA-485 communications port using twisted pair. A two position DIP switch allows for manualselection of desired protocol. Available protocols are BACnet MS/TP, Johnson Controls N2,Modbus and LonWorks (requires Loc daughter card. Another 2 position DIP switch allowsfor manual selection of desired baud rate. Available baud rates are 9600, 19.2k, 38.4k,and 76.8k.Addressing:2 rotary switches are provided for setting the individual controller’s primary network address(for more information on network addressing, see Addressing & Power Up).Wall Sensor:The wall sensors provide room temperature sensing with digital display, local setpoint adjust,local override, LED for alarm status and fault type indication, and heat pump reset. The wallsensors require a 4 wire connection for communication or 5 wire connection fornon-communicating.Mounting HoleDimensions:Two mounting holes center line as below with 5-9/16 ” [141mm] height spacing.Factory mounted.5
THE SMART SOLUTION FOR ENERGY EFFICIENCYMPC MultiProtoCol DDC ControlsRevised: March 7, 2017LocalAccess PortRoom SensorType Works DaughterCard ConnectionIN-1*IN-2**Module HardwareAddressing(Communicating)Rnet SensorProtocol &Baud gLStat SensorConnectorCommunications Type SelectionPhysical Dimension: 5.88" (149.4mm) x 5.66" (143.8mm)6
THE SMART SOLUTION FOR ENERGY EFFICIENCYMPC MultiProtoCol DDC ControlsRevised:March 7, 2017Selects “LSTAT Sensor Connection” or“RNET” port as the active port for roomsensor.Default LSTATFactory Use Only - 1Default no jumperSelects 1x (jumpered) or 3x (nojumper) gain for “Therm” Input.Default 3x (no jumper)Selects “Thermistor/Drycontact or “0 to 5Vdc”input for IN-1Default “Thermistor/DryContact”5RRP 6HQVRU%DVLF RU 3OXV /RJLQHW* 5[*QG 9DF)DFWRU\ * 7[7KHUP ,QSXW *DLQ RW-XPSHU [ 1R -XPSHU [3RZHU *%DWW5XQ * 7HQV ,1 2QHV 9GF)DFWRU\ ,1 'U\'U\(UURU 5,1 ,1 9GF7KHUPLVWRU GU\ FRQWDFW 9GF7KHUPLVWRU GU\ FRQWDFW 9GF3URWRFROV56 % &QHWRYHU 5& %DXG 5DWH&RPPXQLFDWLRQV 6HOHFW56 2SWLRQV',3Selects “Thermistor/Drycontact or “0 to 5Vdc”input for IN-2Default “Thermistor/Dry Contact”&RPPXQLFDWLRQV 6HOHFWLRQ 56 &RPPXQLFDWLRQV 2SWLRQVҊ352ҋ 6SDFH 6HQVRU&RQQHFWLRQZ GLVSOD\Factory Use Only - 2Default jumpered56 % &QHW2YHU 5& 35272&2/6 6: 6: % &QHW 2II 2II06 731 2Q 2II0RGEXV 2II 2QSelects “RS-485 MS/TP” or “ARC156”Default “RS-485 MS/TP”7
THE SMART SOLUTION FOR ENERGY EFFICIENCYMPC MultiProtoCol DDC ControlsRevised: March 7, 2017Communications SelectionWhen the Communications Selection Jumper is in the“BACnet over ARC156” position, DIP switch selectorsSW1, SW2, SW3, and SW4 are all disabled. When theCommunications Selection Jumper is in the “BACnetover ARC156” position, BACnet protocol is selectedand the baud rate is also selected to be 156 kbps. In thisscenario, when the comm. port is configured for “BACnetover ARC156” communications, use an A3ARC156 wireavailable from:Protocol ConfigureThe comm. port on the MPC has MultiProtoColcapability which means the MPC can be configuredto communicate via BACnet, Johnson Controls N2, orModBus communication protocols. This configuration isdone via the “Communications Selection” jumper andthe 4-position DIP switch package (SW1, SW2, SW3, SW4)located on the MPC. The comm. port’s baud rate is alsoset with this same 4-position DIP switch package. SeeFigure 9 below.When the comm. port is configured for RS-485communications, use standard dedicated 22AWG18AWG twisted pair wire.Note: If using ARC156 wiring, then only BACnetprotocol can be used. When using RS-485 wiring, anyof the 3 protocols (BACnet, N2, ModBus) can be used.For complete details on wiring, termination, and ngfor BACnet MS/TP, refer to ANSI/ASHRAE 135-1995,clause 9.2.2. Refer to the Application Note for theBACnet devices that you will be interfacing with forspecific wiring.Figure 9: Wiring the ARC156Communications Wiring Instructions1.Be sure the module’s power is off beforewiring it to the ARC156 or RS-485communications bus.2.Check the network communication wiringfor shorts and grounds.3.Connect the ARC156 or RS-485 wires andshield to the module’s screw terminals asshown in Figure 9. Be sure to follow thesame polarity as the rest of the ARC156 orRS-485 communications network.4.Power up the module.5.Proper communications for all protocolsand baud rates can be verified by makingsure the transmit (Tx) and receive (Rx) LEDsare active.8
THE SMART SOLUTION FOR ENERGY EFFICIENCYMPC MultiProtoCol DDC ControlsRevised:March 7, 2017BACnet Setup – The MPC can be set up tocommunicate via “BACnet over ARC156” or “BACnetMS/TP”. Refer to Table 2 for setup.Figure 10: Communications SelectionsN2 Setup – N2 must be configured for RS-485communications with a baud rate of 9600, using 8 databits, no parity, and 1 stop bit. The MPC is always an N2slave. Refer to Table 2 for setup.ModBus Setup – ModBus must be configured for RS-485communications. Baud rate can be selected from 38.4kbps, 19.2 kbps, or 9.6 kbps. Refer to Table 2 for setup.Table 2: Communications Set Up9
THE SMART SOLUTION FOR ENERGY EFFICIENCYMPC MultiProtoCol DDC ControlsRevised: March 7, 2017BACview6 Service ToolBACview6 provides local access to control and operational properties of equipment. The BACview6simply plugs into an Rnet connection (local access port) and allows you to display and modify ClimateMaster-defined properties without any computer software. The BACview6 features a numeric keypad,directional keys, and four function keys. A large 4-line by 40-character backlit LCD display is providedfor easy reading even in poor lighting conditions. The device also includes an alarm indicator light andaudible warning. ClimateMaster recommends this service tool for sites over 25 units or units withthe stand-alone application.Part#1: ABACVIEW6Part#2: ABACVIEW6A (cable)HOW TO WIRE ABACVIEW to ABACVIEW6AWhen prompt for password.ClimateMaster Password: 111110RedBlueWhiteBlack&Green12vRnetRnet GND
THE SMART SOLUTION FOR ENERGY EFFICIENCYMPC MultiProtoCol DDC ControlsRevised:March 7, 2017Addressing & Power UpBefore setting or changing the module's hardwareaddress, make sure the MPC Controller power is off. TheMPC only reads the address when the module is turnedon. The MPC has two rotary switches for assigning themodule’s hardware address. One switch corresponds tothe “tens” digit and the second switch corresponds tothe “ones” digit, allowing for hardware- based addressing of up to address 99. For example, if the module’saddress is three, set the tens switch to zero and theones switch to three. The station ID for each MS/TPnode must be unique on a MS/TP segment. The MPC’srotary address switches are used to set this unique ID.Setting Module AddressChanging the device instance when using a networkof more than 99 MPC unitsNote – This applies to Gen4 MPC’s only. When usingGen3 MPC’s, to allow for more than 99 uniqueaddresses, a special request should be made throughthe Product Management and Applications team.The Gen 4, 5 and 6 MPC allows the device instance tobe changed using the BACview6 service tool. This feature allows an installation with more than 99 MPC-basedunits to be set and managed on-site rather than factorypreset.In order to change the device instance, the MPC mustbe powered up. Connect the BACview6 service tool tothe MPC using the local access port. When the mainscreen appears, scroll down to “Manual Control” usingthe down arrow and press “Enter”;After setting the address, turn power on to the MPC.The Run, Error, and Power LEDs should turn on. The RunLED should begin to blink and the Error LED should turnoff. Use Table 1 to troubleshoot the LEDs.NOTE: Set address for heat pump #1 (HP-1) at 02 pertypical BMS naming conventions. All other heat pumpaddresses should be assigned as HP# 1.At the “Manual Control” screen, press “Enter” with“Unit Configuration” highlighted and again with “BACnet” highlighted. The following screen should appear;111
THE SMART SOLUTION FOR ENERGY EFFICIENCYMPC MultiProtoCol DDC ControlsRevised: March 7, 2017Addressing & Power Up23The device instance is typically six digits long. The lasttwo digits correspond to the hardware’s module addressso these should not be changed using the BACview64To change the device instance, use the down arrow tohighlight the numbers beside “Base BACnet Device ID”and press “Enter”. You will be prompted for an AdminPassword, the password is 1111. A cursor underlining thefinal digit of the “Base BACnet Device ID” will appear.Before change (fourth digit is 0);12
THE SMART SOLUTION FOR ENERGY EFFICIENCYMPC MultiProtoCol DDC ControlsRevised:March 7, 2017LED CodesThe MPC Controller has the following LEDs:Digital Output LEDsPower - indicates when power is on.Run - blinks when the processor is running.Error - lights when an error is detected.Receive (Rx) - lights when the Comm Port receives data.Transmit (Tx) - lights when the Comm Port transmits data.Digital Output - lights when the associated digital outputturns on.LED Power-Up SequenceDuring power-up, the module goes through aninitialization and self test sequence.Proper module power-up can be verified by observingthe LEDs as follows:1. The Run and Error LEDs turn on and begin blinking.2. The Error LED then turns off.3. The Run LED continues blinking.Note: The Error LED flashes three times in sync withthe Run LED when the module is being formatted.The Run LED should never stop flashing. If it stopsflashing for 1.5 seconds, the watchdog timer will resetthe module.Overcurrent ProtectionThe MPC Controller is protected by internal solid statepolyswitches (polymeric PTC, resettable overcurrentprotection device, also called PPTC) on the incomingpower. The overcurrent protection circuitry is a positivetemperature coefficient (PTC) thermistor that increasesin resistance as it warms up and stays in that mode untilthe power is removed. Once the power is removed, thepolyswitch resistance lowers to operational level as thedevice cools down. After power has been re-applied, theunit will operate properly if the fault condition has beenremoved.It is not necessary to remove power on thecommunication line in order to reset the solid stateovercurrent circuit. Once the power level is low enough,the overcurrent circuit cools down to operatingtemperature. A blown polyswitch can indicate incorrectwiring if the polyswitch is blown during installation.Generally, a blown polyswitch indicates a power surgewas received by the board.There are 5 digital outputs on the MPC. One output(AUX) can be custom configured to control an externaldevice (1amp at 24VAC.). G, O, Y2, and Y1 are required tooperate the heat pump and are connected to the CXM,DXM or DXM2 board.Run LEDError LEDCondition2 flashesper secondOFFNormal2 flashesper second2 flashes, alternatingwith Run LEDFive minute auto-restartdelay after system error2 flashesper second3 flashes then OFFModule has just been formatted2 flashesper second4 flashes then pauseTwo or more devices onthis network have the sameARC156 network address2 flashesper second6 flashes then OFFModule’s response to aLonTalk ‘wink’ commandreceived from a LonWorksNetwork Management Tool2 flashesper secondONExec halted after frequentsystem errors or GFB’s halted5 flashesper secondONExec start-up aborted,Boot is running5 flashesper secondOFFFirmware transfer in progress,Boot is running7 flashesper second7 flashes per second,alternating with Run LEDTen second recovery periodafter brownout14 flashesper second7 flashes per second,alternating with Run LEDBrownout13
THE SMART SOLUTION FOR ENERGY EFFICIENCYMPC MultiProtoCol DDC ControlsRevised: March 7, 2017Room SensorsAdditional InputsThe MPC is design to work with specific sensors. Twotypes of sensors may be used: Lstat (ASW06, ASW07, andASW08) and RNet (ASW13, ASW14, and ASW15). TheRNet connection is at the upper left of the MPC and theLSat is at the lower left. Both are four to five wire sensors.The MPC comes factory set for the Lstat sensor at theroom sensor jumper. To utilize the RNet (ASW13, 14, 15)sensors the jumper must be changed to RNet.There are four inputs available when either type of sensoris used. Two additional inputs are available when theRnet sensor is used.The use of the RNet sensor allows for an extra input intothe MPC. The ASW13, 14 15 are available with additionalinternal sensors possibilities including Humidity, CO2 orVOC. When using a unit equipped with Climadry Reheat,a combination temperature and humidity sensor isrequired. Refer to ASW section.AL1/AL2 and EH2 input terminals can accept 0-5VDC,Thermistor, or dry contact signals. Terminals LAT/LWTLand LWT/LWTS accept thermistor or dry contact signals.LAT/LWTL and LWT/LWTS come with leaving air andleaving water temperature thermistors installed but canbe repurposed. The Lsat terminals can be used for anadditional thermistor input (Gnd/Temp) and SW can beused as a dry input contact.The MPC allows custom programing of the variousinputs to accomplish various sequence of operations asthe building may require. A common use could be anoccupancy sensor which can put units in a standby mode.Certain options can be added to the MPC programingafter installation if controls system upgrades/changesare being considered. Consult factory for applicability.The MPC can be programmed with a 7 day program: theroutine is built into the software.14
THE SMART SOLUTION FOR ENERGY EFFICIENCYMPC MultiProtoCol DDC ControlsRevised:March 7, 2017Operation OverviewFan Operation – Digital output point G (DO4) is the fanoutput and is connected to the "G" terminal on theCXM, DXM or DXM2 control. If fan Mode is set to "Auto"mode, then the fan is energized only during a call forheating or cooling. "Auto" mode is the default modeof operatio At 30% PID, the fan(G) energizes in Automode.Heating/Cooling Changeover – Digital output pointO(DO3) is the RV output and is connected to the"O" terminal on the CXM, DXM or DXM2 board. O isenergized during call for cooling. The RV(O) energizesat 40% PID in cooling only.Compressor Operation – Digital output points Y1 (DO1)and Y2 (DO2) are the outputs for compressors stage1 and 2. Y1 is connected to Y terminal on the CXM/DXM/DXM2 and if the heat pump is dual stage, Y2
Communications: EIA-485 communications port using twisted pair. A two position DIP switch allows for manual selection of desired protocol. Available protocols are BACnet MS/TP, Johnson Controls N2, Modbus and LonWorks (requires Loc daughter card. Another 2 position DIP switch allows for manual selection of desired baud rate.
DDC Controls-Use Open Networks BacNet (don't be confused with multiple systems) 20 DDC Controls-Use Open Networks BacNet (View all controls from one network) 21 DDC Control Intervention is the Key. 22 DDC Controls Be Sure Your DDC Controls Vendor is Using BacNet. 23 DDC Controls BacNet. 24
MPC Multi-Protocol/DDC Controls 3 THE SMART SOLUTION FOR ENERGY EFFICIENCY MPC Multi-Protocol DDC Controls August 18, 2021 3 The Multi-Protocol (MPC) Heat Pump controller is a dual purpose controller. It contains the logic to perform as an advanced customizable thermostat when combined with a wall sensor and is designed to allow the integration of
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to access the DDC. See figure 2. A55 Prodigy control board DDC ASSEMBLY DDC Figure 2. 036, 060, 120 Units Accessing DDC (Top View) 5. 240 Units:Attach the hat section provided in the kit to the DDC assembly using two 5/8" screws (see figure 3.) HAT SECTION USED ON 240 UNITS ONLY DDC HINGED MOUNTING PANEL Figure 3. 240 Units .
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BACnet Setup – The MPC can be set up to communicate via “BACnet over ARC156” or “BACnet MS/TP”. Refer to Table 1 for setup. N2 Setup – N2 must be configured for RS-485 communications with a baud rate of 9600, using 8 data bits, no parity, and 1 stop bit. The MPC is always an N2 slave. Refer to Table 1 for setup.
