Installation and Operation. Tracer MP501 Controller CNT-SVX08B-EN

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1 Installation and Operation Tracer MP501 Controller CNT-SVX08B-EN

2

3 Installation and Operation Tracer MP501 Controller CNT-SVX08B-EN April 2005

4 CNT-SVX08B-EN

5 Tracer MP501 Controller Installation and Operation This guide and the information in it are the property of American Standard Inc. and may not be used or reproduced in whole or in part, without the written permission of American Standard Inc. Trane, a business of American Standard, Inc., has a policy of continuous product and product data improvement and reserves the right to change design and specification without notice. Although Trane has tested the hardware and software described in this guide, no guarantee is offered that the hardware and software are error free. Trane reserves the right to revise this publication at any time and to make changes to its content without obligation to notify any person of such revision or change. Trane may have patents or patent applications covering items in this publication. By providing this document, Trane does not imply giving license to these patents. The following are trademarks or registered trademarks of American Standard Inc.: Trane, Tracer, Rover. The following are trademarks or registered trademarks of their respective companies or organizations: BACnet from ASHRAE; Neuron, LonMark, LonTalk, and LonWorks from Echelon Corporation; National Electrical Code form the National Fire Proctection Association, Inc. Printed in the U.S.A American Standard Inc. All rights reserved CNT-SVX08B-EN

6 NOTICE: Warnings and Cautions appear at appropriate sections throughout this manual. Read these carefully: WARNING Indicates a potentially hazardous situation, which, if not avoided, could result in death or serious injury. CAUTION Indicates a potentially hazardous situation, which, if not avoided, may result in minor or moderate injury. It may also be used to alert against unsafe practices. CAUTION Indicates a situation that may result in equipment damage or property damage. The following format and symbol conventions appear at appropriate sections throughout this manual: IMPORTANT Alerts installer, servicer, or operator to potential actions that could cause the product or system to operate improperly but will not likely result in potential for damage. Note: A note may be used to make the reader aware of useful information, to clarify a point, or to describe options or alternatives. This symbol precedes a procedure that consists of only a single step. CNT-SVX08B-EN

7 Contents Chapter 1 Overview and specifications Product description Storage environment Dimensions Clearances Agency listing/compliance Additional components Power transformer Zone temperature sensors (SCC mode) Generic sensors Binary input switching devices Binary output actuators and relays Analog output actuator Chapter 2 General wiring information Input/output terminal wiring AC-power wiring Communication-link wiring and addressing Chapter 3 Mounting the controller Location recommendations Operating environment requirements Mounting recommendations Chapter 4 Applications for SCC mode Inputs for SCC applications BI1: Occupancy or generic binary input AI1: 4 20 ma analog input SET: Local setpoint ZN: Zone temperature CNT-SVX08B-EN i

8 Contents Outputs for SCC applications Binary output 1 and binary output Binary output AO: Analog output Overriding outputs Wiring diagrams Chapter 5 Sequence of operations for SCC mode Power-up sequence Zone temperature control Occupancy modes Occupied mode Unoccupied mode Occupied standby mode Occupied bypass mode Timed override control Output types Tri-state modulating Analog stage Fan operation Fan off delay Peer-to-peer data sharing Chapter 6 Applications for generic mode Inputs for generic applications BI1: Enable/disable or generic binary input AI1: 4 20 ma analog input SET: Local setpoint ZN: Zone temperature Outputs for generic applications Binary output 1 and binary output Binary output AO: Analog output Overriding outputs Wiring diagrams ii CNT-SVX08B-EN

9 Contents Chapter 7 Sequence of operations for generic mode Power-up sequence Loop enable/disable Relay output control Output types Tri-state modulating Analog stage Chapter 8 PID control What PID loops do PID calculations Proportional calculation Integral calculation Derivative calculation Throttling range and gain Calculating the gain Sampling frequency Calculating the sampling frequency PID loop action Direct action Reverse action Determining the action Error deadband Typical applications Adjusting error deadband for modulating outputs Adjusting error deadband for staged outputs Other PID settings Troubleshooting procedure Tips for specific problems Changing the sampling frequency Changing the gains CNT-SVX08B-EN iii

10 Contents Chapter 9 Status indicators for operation and communication Test button Manual output test Service Pin button Interpreting LEDs Diagnostics Chapter 10 Troubleshooting Initial troubleshooting Binary output 3 (relay output) troubleshooting Analog output (0 10 Vdc) troubleshooting Binary output 1 and 2 troubleshooting Occupancy arbitration (SCC mode only) Occupancy manual command Occupancy schedule Occupancy sensor ON/CANCEL buttons Occupancy binary input Index iv CNT-SVX08B-EN

11 Chapter 1 Overview and specifications This guide provides installation and configuration information for the Tracer MP501 controller, as well as a description of its operations. The overview includes a product description, specifications, and descriptions of additional components needed in some MP501 applications. Product description The Tracer MP501 is a configurable, multi-purpose controller used to provide direct-digital control for heating, ventilation, and air conditioning (HVAC) equipment. The controller can operate as a stand-alone device or as part of a building automation system (BAS). Communication between the controller and a BAS occurs via a LonTalk communication link. The Tracer MP501 provides a single control loop with the following output types: 2-stage, tri-state modulating, and 0 10 Vdc analog. The controller can be configured in two possible modes: Space Comfort Controller (SCC) or generic. In SCC mode, the Tracer MP501 conforms to the LonMark Space Comfort Control profile and controls space temperature to an active setpoint. SCC mode supports the following applications: Heating control loop Cooling control loop Two-pipe heat/cool automatic changeover using a communicated supply water temperature value In generic mode, the Tracer MP501 provides control flexibility in a variety of applications that do not necessarily follow a LonMark profile. The control loop accepts inputs of the following types: temperature, pressure, flow, percent, or parts per million (ppm). Generic mode supports many applications including: Fan speed control based on duct static pressure Pump speed control based on water differential pressure or flow Humidifier control based on space or duct relative humidity CNT-SVX08B-EN 1

12 Chapter 1 Overview and specifications Storage environment If a Tracer MP501 controller is to be stored for a substantial amount of time, store it in an indoor environment that meets the following requirements: Temperature: 4 to 160 F ( 20 to 70 C) Relative humidity: 10 90%, noncondensing Dimensions Plastic-cover model dimensions For complete dimensional drawing, see Figure 1 on page 3. Height: in. (137 mm) Width: in. (175 mm) Depth: 2 in. (51 mm) Metal-cover model dimensions For complete dimensional drawing, see Figure 1 on page 3. Height: 9.0 in (25 mm) Width: 10.37in. (263 mm) Depth: 2.25 in. (58 mm) Clearances For wiring, ventilation, and maintenance, provide the following minimum clearances for the controller: Plastic-cover model (see Figure 1 on page 3) Front: 4.0 in. (102 mm) Each side: 1.0 in. (25 mm) Top and bottom: 4.0 in. (102 mm) Metal-cover model (see Figure 1 on page 3) Front: 24.0 in. (610 mm) Each side: 2.0 in. (51 mm) Top and bottom: 1.0 in. (25 mm) 2 CNT-SVX08B-EN

13 Clearances Figure 1. Plastic-cover model dimensions and clearances 1 in. (25 mm) 4 in. (102 mm) 4 in. (102 mm) in. (143 mm) 6.31 in. (160 mm) 4 in. (102 mm) in. (175 mm) Clearances Dimensions in. (137 mm) 1 in. (25 mm) 2 in. (51 mm) Figure 2. Metal-cover model dimensions and clearances 1 in. (25 mm) (48 mm) 6.5 in. (165 mm) 2 in. (51 mm) 9 in. (229 mm) 7 in. (178 mm) 2 in. (51 mm) 0.28 in (7 mm) 9 in. (229 mm) 24 in. (610 mm) in. (263 mm) width with cover Clearances Dimensions 1 in. (25 mm) 1 in. (25 mm) 2.25 in. (58 mm) in. (260 mm) width without cover CNT-SVX08B-EN 3

14 Chapter 1 Overview and specifications Agency listing/compliance CE Immunity: EN :1997 CE Emissions: EN :1992 (CISPR 11) Class B EN , EN UL and C-UL listed: Energy management system UL 94-5V (UL flammability rating for plenum use) FCC Part 15, Class A Additional components The Tracer MP501 controller requires the use of additional components for monitoring and proper control of the equipment it is controlling. Use of various components depends on the application. They are not included with the Tracer MP501 controller. Power transformer A UL-listed Class 2 transformer providing 70 VA at 24 Vac is required to power the Tracer MP501 and associated output relays and actuators. Zone temperature sensors (SCC mode) Table 1 shows the Trane zone temperature sensors that are supported by the Tracer MP501 controller in SCC mode. Table 1. Tracer zone temperature sensor options BAS order number Setpoint thumbwheel Zone Temperature sensor Timed override buttons On Cancel Comm jack x x x x x x x x x x x x x Generic sensors In generic mode the input (AI1) can be configured as temperature, flow, pressure, percent, or ppm. In any case, the input is a 4 20 ma sensor. Whenever the controller is configured for generic mode, the input must be 4 CNT-SVX08B-EN

15 Additional components connected to the 4 20 ma input on the controller. The range of the sensor being used (for example, 4 20 ma is 0 5 in. wc.) is configured with the device plug-in of a software service tool (such as the Rover service tool). Binary input switching devices The binary input determines occupancy in SCC mode. If the input is open the controller is in occupied mode and if the input is closed the controller is in unoccupied mode. A binary switching device, such as a time clock or motion sensor, can be used to control the occupancy mode of the controller. In generic mode the control loop is enabled if the input is open. The loop is disabled if the input is closed. A binary switching device, such as a flow switch, can be used to enable the control loop. CNT-SVX08B-EN 5

16 Chapter 1 Overview and specifications Binary output actuators and relays There are three binary outputs on the Tracer MP501. Binary outputs 1 and 2 are triac outputs. They can be configured to control a tri-state modulating actuator or stage on two separate binary points. The tri-state modulating actuator cannot exceed a 12 VA (0.5 A) current draw at 24 Vac. Binary output 3 is a Form A (SPST) relay output. This relay is energized whenever the controller is occupied (SCC) or enabled (generic). Relays connected to this binary output on the controller cannot exceed 1 A current draw at 24 Vac. Analog output actuator The Tracer MP501 has a 0 10 Vdc output to drive an actuator. The actuator connected to this analog output cannot exceed 10 ma current draw. Note: The Tracer MP501 will control only one actuator. You cannot have both a 0 10 Vdc actuator and a tri-state modulating actuator connected to the controller at the same time. 6 CNT-SVX08B-EN

17 Chapter 2 General wiring information This chapter provides specifications and general information about wiring the Tracer MP501 controller. The controller requires wiring for: Input/output terminals AC power to the controller Communication-link wiring, if the controller is to communicate with a building automation system (BAS) Input/output terminal wiring All input/output terminal wiring for the Tracer MP501 controller must meet the following requirements: All wiring must comply with the National Electrical Code and local codes. Use only 18 AWG, twisted-pair wire with stranded, tinned-copper conductors. (Shielded wire is remcommended.) Binary input and output wiring must not exceed 1000 ft (300 m). Analog input and output wiring must not exceed 300 ft (100 m). Do not run input/output wires in the same wire bundle with any acpower wires. For application-specific wiring information and diagrams, see Chapter 4, Applications for SCC mode, and Chapter 6, Applications for generic mode. CNT-SVX08B-EN 7

18 Chapter 2 General wiring information AC-power wiring WARNING HAZARDOUS VOLTAGE! Before making line voltage electrical connections, lock open the supplypower disconnect switch. Failure to do so may cause death or serious injury. CAUTION Make sure that the 24 Vac transformer is properly grounded. Failure to do so may result in minor or moderate personal injury and/or damage to equipment. CAUTION Complete input/output wiring before applying power to the Tracer MP501 controller. Failure to do so may cause damage to the controller or power transformer due to inadvertent connections to power circuits. CAUTION To prevent controller damage, do not share 24 Vac between controllers. All wiring must comply with National Electrical Code and local codes. The ac-power connections are in the top left corner of the Tracer MP501 controller (see Figure 3). Figure 3. Connecting ac-power wires to the controller 24 Vac transformer H N GND 24V 24V 1 AC POWER BIN Use a UL-listed Class 2 power transformer supplying a nominal 24 Vac (21 27 Vac). The transformer must be sized to provide adequate power to 8 CNT-SVX08B-EN

19 Communication-link wiring and addressing the Tracer MP501 controller (10 VA) and output devices, including relays and actuators (a maximum of 60 VA for outputs). The Tracer MP501 may be powered by an existing transformer integral to the controlled equipment, provided the transformer has adequate power available and adequate grounding is observed. Communication-link wiring and addressing The Tracer MP501 controller communicates with the BAS and with other controllers via a LonTalk communication link. IMPORTANT For important instructions on network wiring, refer to the Tracer Summit Hardware and Software Installation guide (BMTW-SVN01B-EN). Wiring for the communication link must meet the following requirements: All wiring must comply with the National Electrical Code and local codes. 22 AWG Level 4 unshielded communications wire recommended for most Comm5 installations. Termination resistors are required for wiring LonTalk devices communicating on a network. For important instructions on using termination resistors for LonTalk applications, refer to the latest version of the Tracer Summit Hardware and Software Installation guide. Each Tracer MP501 controller has a unique 12-character alphanumeric device address for communicating on a BAS network. This address, referred to as a Neuron ID, is assigned in the factory before the product is shipped. Each controller can be identified by viewing its unique Neuron ID, which is on a printed label attached to the circuit board of the controller. Additional adhesive-backed, peel-off Neuron ID labels are tethered to the controller for placing on mechanical prints or unit location worksheets. The Neuron ID will appear when communication is established with a service tool (such as the Rover service tool) or a BAS. An example Neuron ID is C-2B-00. CNT-SVX08B-EN 9

20 Chapter 2 General wiring information 10 CNT-SVX08B-EN

21 Chapter 3 Mounting the controller This chapter gives recommendations and requirements for mounting the Tracer MP501 controller. Location recommendations Trane recommends locating the Tracer MP501 controller: In an indoor environment for protection from the elements Near the controlled equipment to reduce wiring costs Where it is easily accessible for service personnel Where public access is restricted to minimize the possibility of tampering or vandalism Operating environment requirements Operate a Tracer MP501 controller in an indoor environment that meets the following requirements: Temperature: 32 F to 122 F (0 C to 50 C) Relative humidity: 10 90%, noncondensing CNT-SVX08B-EN 11

22 Chapter 3 Mounting the controller Mounting recommendations Figure 4. Mounting the Tracer MP501 controller IMPORTANT Leave the cover on when mounting the Tracer MP501 controller to avoid the possibility of damaging the circuit board during installation. Mounting recommendations are as follows: Mount the controller in any direction, other than with the front of the cover facing downward. Mount using the two 3 / 16 in. (4.8 mm) radius mounting holes provided (see Figure 4). Mounting fasteners are not included. Attach the controller securely so it can withstand vibrations of associated HVAC equipment. If the controller is mounted in a small enclosed compartment, complete all wiring connections before securing the controller in the compartment. 12 CNT-SVX08B-EN

23 Chapter 4 Applications for SCC mode This chapter provides information about the function of inputs and outputs and examples of wiring for typical applications controlling space temperature. When controlling a space temperature, the Tracer MP501 controller is essentially a thermostat replacement. The Tracer MP501 may be used to control many types of equipment, including: Multi-zone damper control Base board radiation Small constant-volume air-handling unit Fan coil (pneumatic thermostat replacement) VAV (pneumatic thermostat replacement) Zone reheat Unit heater Which of the Tracer MP501 controller s many input/output terminals to wire, and how to wire them, depends upon the application. IMPORTANT The Tracer MP501 controller ships from the factory configured in Space Comfort Controller (SCC) mode. Use a service tool (such as the Rover service tool) to change the configuration to match your particular application. CNT-SVX08B-EN 13

24 Chapter 4 Applications for SCC mode Inputs for SCC applications The Tracer MP501 controller includes four inputs. Table 2 lists the inputs and their function in SCC mode. Table 2. Inputs (SCC mode) Input BI1 AI1 SET ZN Function Occupancy or generic Not used Local setpoint Local zone temperature BI1: Occupancy or generic binary input The binary input equates a signal of 0 Vac with open contacts and 24 Vac with closed contacts. The binary input can function in two ways: as an occupancy input or as a generic binary input. If configured as occupancy, the binary input (open is occupied) changes the zone setpoints between the occupied and unoccupied settings. For stand-alone controllers, this input can be wired to a binary switch (occupancy sensor) or time clock to determine the occupancy mode either occupied or unoccupied. For controllers receiving a communicated occupancy request, the function of this binary input is to change the mode from occupied to occupied standby. (For more information on occupancy modes, see Occupancy modes on page 22.) If configured as generic, the binary input can be monitored only by a BAS, and has no direct effect on Tracer MP501 operation. AI1: 4 20 ma analog input This input is not used if the controller is operating in SCC mode. Neither the Tracer MP501 nor a BAS system can use this input if the Tracer MP501 is configured in SCC mode. SET: Local setpoint The SET analog input functions as the local (hard-wired) temperature setpoint input for applications utilizing a Trane zone sensor with a temperature setpoint thumbwheel. The ability to enable or disable the local setpoint input is available in the Rover service tool. A communicated setpoint value can also be used for controllers operating on a BAS. If both a hard-wired and communicated setpoint value is present, the controller uses the communicated value. If neither a hard-wired nor a communicated setpoint value is present, the controller uses the stored default setpoints (configurable using a service tool such as the Rover service tool). 14 CNT-SVX08B-EN

25 Outputs for SCC applications ZN: Zone temperature The ZN analog input functions as the local (hard-wired) zone temperature input. The controller receives the temperature as a resistance signal from a 10 kω thermistor in a standard Trane zone sensor wired to the analog input labeled ZN. A communicated zone temperature value can also be used for controllers operating on a BAS. If both a hard-wired and a communicated zone temperature value are present, the controller uses the communicated value. If neither a hard-wired nor a communicated zone temperature value is present, the controller generates a Space Temperature Failure diagnostic. The ZN analog input is also used to communicate timed override requests and cancel requests to the controller for applications utilizing a Trane zone sensor with the ON and CANCEL button option. Also, if the ON button is pressed for more than five seconds, the controller initiates a Service Pin message. Outputs for SCC applications The Tracer MP501 controller includes four outputs. Table 3 lists the outputs and their functions in SCC mode. Table 3. Outputs (SCC mode) Output Binary output 1 Binary output 2 Binary output 3 Analog output (AO) Function Drive open or stage 1 (triac) Drive close or stage 2 (triac) Fan (relay) Controlled actuator (0 10 Vdc) Binary output 1 and binary output 2 Binary outputs 1 and 2 are 24 Vac triac outputs that are designed to switch ac common. They can function in two different ways. They can drive a tri-state modulating actuator. For some applications it may be more cost effective to use this type of actuator rather than a 0 10 Vdc actuator. Figure 5 on page 17 shows a wiring diagram with the Tracer MP501 being used to control this type of actuator. Alternatively, binary outputs 1 and 2 can be used to control two separate binary outputs in stages. The Tracer MP501 will first turn on stage 1 (binary output 1). Then, as the control loop senses a larger demand, stage 2 (binary output 2) will be controlled on. Figure 6 on page 18 shows a wiring diagram with the Tracer MP501 in this configuration. Note: The Tracer MP501 will control only one actuator. You cannot have both a 0 10 Vdc actuator and a tri-state modulating actuator connected to the controller at the same time. CNT-SVX08B-EN 15

26 Chapter 4 Applications for SCC mode Binary output 3 This binary output is a relay with a maximum current draw of 1 A. This relay will be energized based on occupancy of the Tracer MP501. Typically, this relay will control a fan. The fan can be configured to operate continuously or cycle on/off based on temperature. If configured as continuous, the fan relay will be energized whenever the occupancy mode is occupied. The fan relay will be energized only if the space temperature is calling for heating or cooling in the cycling mode. In unoccupied mode, the fan relay always cycles according to the unoccupied temperature setpoints. AO: Analog output The analog output on the Tracer MP501 controller is a 0 10 Vdc output with a maximum current draw of 10 ma from the connected device. Figure 7 on page 19 shows a wiring diagram with the Tracer MP501 in this configuration. Note: The Tracer MP501 will control only one actuator. You cannot have both a 0 10 Vdc actuator and a tri-state modulating actuator connected to the controller at the same time. Overriding outputs The Tracer MP501 includes a manual output test. Use this feature to manually control the outputs in a defined sequence. For more information, see Manual output test on page 58. Wiring diagrams The following figures show the Tracer MP501 outputs wired in three different ways. Figure 5 on page 17 shows the Tracer MP501 controlling a tri-state modulating actuator. The Tracer MP501 controlling staged outputs is shown in Figure 6 on page 18. Figure 7 on page 19 shows an application with the Tracer MP501 controlling an analog (0 10 Vdc) actuator. 16 CNT-SVX08B-EN

27 80 * 65 ** Wiring diagrams Figure 5. Input/output terminal wiring for SCC applications with the Tracer MP501 controlling a tri-state modulating actuator Tri-state modulating actuator Not used Fan on/off H 24 Vac N Open Close Not used GND 24V 24V 1 24V 2 24V 3 AC POWER BINARY OUTPUTS OUT GND AO STATUS LED SERVICE LED PIN COMM5 BI AI ZONE SENSOR A B A B BI 1 GND +20 AI1 SET GND ZN COMM5 LED LonTalk communication link In Out Not used Trane zone temperature sensor ON Optional LonTalk connection Cancel Occupancy or generic input CNT-SVX08B-EN 17

28 80 * 65 ** Chapter 4 Applications for SCC mode Figure 6. Input/output terminal wiring for SCC applications with the Tracer MP501 controlling staged outputs Stage 2 Stage 1 Fan on/off H 24 Vac N Not used GND 24V 24V 1 24V 2 24V 3 AC POWER BINARY OUTPUTS OUT GND AO STATUS LED SERVICE LED PIN COMM5 BI AI ZONE SENSOR A B A B BI 1 GND +20 AI1 SET GND ZN COMM5 LED LonTalk communication link In Out Not used Trane zone temperature sensor Optional LonTalk connection ON Cancel Occupancy or generic input 18 CNT-SVX08B-EN

29 80 * 65 ** Wiring diagrams Figure 7. Input/output terminal wiring for SCC applications with the Tracer MP501 controlling an analog (0 10 Vdc) actuator Fan on/off H 24 Vac N Not used Analog output (0 10 Vdc) GND 24V 24V 1 24V 2 24V 3 AC POWER BINARY OUTPUTS OUT GND AO STATUS LED SERVICE LED PIN COMM5 BI AI ZONE SENSOR A B A B BI 1 GND +20 AI1 SET GND ZN COMM5 LED LonTalk communication link In Out Not used ON Trane zone temperature sensor Optional LonTalk connection Cancel Occupancy or generic input CNT-SVX08B-EN 19

30 Chapter 4 Applications for SCC mode 20 CNT-SVX08B-EN

31 Chapter 5 Sequence of operations for SCC mode A Tracer MP501 controller in Space Comfort Controller (SCC) mode will operate to maintain the zone temperature setpoint. This chapter discusses many of the operational sequences used by the controller to accomplish this goal. Power-up sequence When 24 Vac power is initially applied to the Tracer MP501 controller, the following sequence occurs: 1. The Status LED goes on. 2. All the outputs are turned off. 3. The controller reads all the inputs to determine their initial values. 4. A user-adjustable (Power Up Control Wait) delay timer begins. If set to less than 10 seconds, a 10-second wait will be applied. 5. The Status LED goes off. 6. The delay timer expires. 7. The Status LED goes on. 8. If a hard-wired space temperature sensor is not detected and no value has been communicated, the actuator output will override to closed and a Space Temperature Failure diagnostic will be generated. 9. Normal operation begins if no diagnostics have been generated. Zone temperature control The proportional, integral, derivative (PID) control loop in the Tracer MP501 controller calculates the required heating or cooling capacity (0 100%). The PID calculation compares the measured space temperature to its active setpoint. For more details about the PID calculation, see Chapter 8, PID control. The current operating mode, consisting of occupancy mode and heat/cool mode, determines the active setpoint. CNT-SVX08B-EN 21

32 Chapter 5 Sequence of operations for SCC mode Occupancy modes Occupancy modes can be controlled by any of the following: The state of the local (hard-wired) occupancy binary input BI1 A timed override request from a Trane zone sensor (see Timed override control on page 23) A communicated signal from a peer device (see Peer-to-peer data sharing on page 26) A communicated signal from a BAS A communicated request, either from a BAS or a peer controller, takes precedence over local requests. If a communicated occupancy request has been established and is no longer present, the Tracer MP501 controller reverts to the default (occupied) occupancy mode after 15 minutes (if no hard-wired occupancy request exists). The Tracer MP501 has the following occupancy mode options: Occupied Unoccupied Occupied standby Occupied bypass For more detailed information about how the Tracer MP501 determines its occupancy mode, see Occupancy arbitration (SCC mode only) on page 71 in Chapter 10, Troubleshooting. Occupied mode In occupied mode, the controller maintains the zone temperature based on the occupied heating or cooling setpoints. The controller uses the occupied mode as a default mode if other forms of occupancy request are not present. The fan will run as configured (continuous or cycling). The PID loop will calculate and control outputs whenever the controller is in occupied mode. Unoccupied mode In unoccupied mode, the controller operates to maintain the zone temperature based on the unoccupied heating or cooling setpoint. The controller always uses the stored default setpoint values (configurable using the Rover service tool), regardless of the presence of a hard-wired or communicated setpoint value. The PID loop will calculate, and the outputs will be controlled, whenever the fan cycles on. Usually, in unoccupied mode, the fan will be off, the PID loop will be inactive, and the output is at its disabled position. Occupied standby mode The controller is placed in occupied standby mode only if a communicated occupied request is combined with an unoccupied request from occupancy binary input. In occupied standby mode, the controller maintains the 22 CNT-SVX08B-EN

33 Timed override control zone temperature based on the occupied standby heating or cooling setpoints. Because the occupied standby setpoints are typically 2 F (1.1 C) higher than the cooling setpoint and 2 F (1.1 C) lower than the heating setpoint, this mode reduces the demand for heating and cooling the space. The fan will run as configured (continuous or cycling). The controller always uses the stored default setpoint values (configurable using the Rover service tool), regardless of hard-wired or communicated setpoint values. Occupied bypass mode The controller is placed in occupied bypass mode if the controller is operating in the unoccupied mode and either the timed override ON button on the Trane zone sensor is pressed or the controller receives a communicated occupied bypass signal from a BAS. In occupied bypass mode, the controller maintains the zone temperature based on the occupied heating or cooling setpoints. The fan will run as configured (continuous or cycling). The controller will remain in occupied bypass mode until either the CANCEL button is pressed on the Trane zone sensor or the occupied bypass time (configurable using the Rover service tool) expires. The temperature setpoints can be local (hard-wired), communicated, or stored default values (configurable using the Rover service tool). Timed override control If the zone sensor has a timed override option (ON/CANCEL buttons), pushing the ON button initiates a timed override on request. A timed override on request changes the occupancy mode from unoccupied mode to occupied bypass mode. In occupied bypass mode, the controller controls the zone temperature based on the occupied heating or cooling setpoints. The occupied bypass time, which resides in the Tracer MP501 and defines the duration of the override, is configurable using the Rover service tool from 0 to 240 minutes (default value of 120 minutes). When the occupied bypass time expires, the unit transitions from occupied bypass mode to unoccupied mode. Pushing the CANCEL button initiates a timed override cancel request. A timed override cancel request will end the timed override before the occupied bypass time has expired and will transition the unit from occupied bypass mode to unoccupied mode. If the controller is in any mode other than unoccupied when the ON button is pressed, the controller still starts the occupied bypass timer without changing the mode to occupied bypass. If the controller is placed in unoccupied mode before the occupied bypass timer expires, the controller will be placed in occupied bypass mode and remain in that mode until either the CANCEL button is pressed on the Trane zone sensor or the occupied bypass time expires. CNT-SVX08B-EN 23

34 Chapter 5 Sequence of operations for SCC mode Output types The Tracer MP501 controller can be configured to control its actuator output in any one of three modes. Tri-state modulating Analog (default) 2-stage Tri-state modulating In the tri-state modulating mode, binary output 1 is used to drive the actuator in the open direction to provide more capacity (such as heating, cooling, or fan speed) and binary output 2 is used to drive the actuator in the closed direction to provide less capacity. When the PID loop creates a change in the actuator command, the controller determines how much time to drive the open or closed outputs on in order to move the actuator to the desired position. The actuator stroke time is configured so the controller can calculate these on times and determine the actuator s position. The output defaults to 50% on power-up. Overdrive logic automatically calibrates the actuator at the fully open and closed positions without continually driving the actuator, which can cause unnecessary wear. Analog In analog mode, the controller uses the actuator command from the PID loop to calculate the desired output voltage for the analog output. The minimum and maximum analog output values can be configured to achieve the desired voltage output for a given command. The output minimum can be set greater than the output maximum in order to accommodate a reverse acting output. For example, a 6 9 Vdc actuator controls a valve where 9 Vdc closes the valve and 6 Vdc opens the valve. In the configuration for the analog output, enter 9 Vdc for a PID output of 0% and 6 Vdc for a PID output of 100%. 2-stage In 2-stage mode, the controller will turn on binary output 1 and binary output 2 in response to the current output of the PID loop. Each binary output has a preset make and break limit to provide hysterises control so an output does not cycle on and off if the PID loop is calculating a value near one of the limits. See Figure 8 on page CNT-SVX08B-EN

35 Fan operation Figure 8. Make and break limits in 2-stage mode O u t p u t S t a t e Active Stage 2 Inactive Active Stage 1 Inactive Break Limit 1 5% Make Limit 1 30% Break Limit 2 45% Make Limit 2 70% Actuator Command (Percent) Fan operation The fan can be configured for continuous or cycling operation for both heating and cooling mode. If configured for continuous operation, the fan runs continuously during the occupied, occupied standby, and occupied bypass modes. If configured for cycling operation, the fan will cycle if the temperature is away from setpoint during the occupied, occupied standby, and occupied bypass modes. During the unoccupied mode, the fan cycles regardless of the fan configuration. Fan off delay After the actuator output has been controlled to its disabled position, the Tracer MP501 automatically keeps the fan energized for an additional time (configurable). The purpose of this feature is to remove residual heating or cooling from the source. CNT-SVX08B-EN 25

36 Chapter 5 Sequence of operations for SCC mode Peer-to-peer data sharing Tracer MP501 controllers have the ability to share data with other Lon- Talk-based controllers. Several controllers can be bound as peers, using the Rover service tool, to share data such as: Setpoint Zone temperature Heating/cooling mode Shared data is communicated from one controller to others. Applications having more than one unit serving the same zone can benefit by using this feature. For example, peer-to-peer data sharing allows multiple controllers to share a single zone temperature sensor and prevents multiple units from simultaneously heating and cooling. 26 CNT-SVX08B-EN

37 Chapter 6 Applications for generic mode This chapter provides information about the function of inputs and outputs and examples of wiring for typical generic applications of the Tracer MP501. In generic mode, the Tracer MP501 may be used to control a variety of applications, including: Humidifier Space pressure Outside air tempering coil Variable-speed pump Simple cooling tower Which of the Tracer MP501 controller s input/output terminals to wire, and how to wire them, depends upon the application. In generic mode, the input used for control can be configured as temperature, flow, pressure, percent, or parts per million (ppm). IMPORTANT The Tracer MP501 controller ships from the factory configured in SCC mode. Use a service tool (such as the Rover service tool) to change the configuration to match your particular generic application. CNT-SVX08B-EN 27

38 Chapter 6 Applications for generic mode Inputs for generic applications The Tracer MP501 controller includes four inputs. Table 4 lists the inputs and their function in generic mode. Table 4. Inputs (generic mode) Input BI1 AI1 SET ZN Function Enable/disable or generic Input (temperature, pressure, flow, percent, ppm) Not used Not used BI1: Enable/disable or generic binary input The binary input equates a signal of 0 Vac with open contacts and 24 Vac with closed contacts. The binary input can function in two ways: as an enable/disable input or as generic binary input. If configured as enable/disable, the binary input allows the control loop to calculate. If the input is open, the control loop calculates. If the input is closed, the control loop is disabled. If configured as generic, the binary input can be monitored only by a BAS, and has no direct effect on Tracer MP501 operation. AI1: 4 20 ma analog input In generic mode this input can be configured as temperature, flow, pressure, percent, or ppm. In any case, the input accepts a 4 20 ma signal. The range of the sensor being used (for example, 4 20 ma is 0 100%) is configured with the device plug-in of a software service tool (such as the Rover service tool). Note: Trane 10 kω thermistor temperature sensors are not compatible with this input. SET: Local setpoint This input is not used if the controller is operating in generic mode. Neither the Tracer MP501 nor a BAS system can use this input if the Tracer MP501 is configured as generic. ZN: Zone temperature This input is not used if the controller is operating in generic mode. Neither the Tracer MP501 nor a BAS system can use this input if the Tracer MP501 is configured as generic. 28 CNT-SVX08B-EN

39 Outputs for generic applications Outputs for generic applications The Tracer MP501 controller includes four outputs. Table 5 lists the outputs and their functions in generic mode. Table 5. Outputs (generic mode) Output Binary output 1 Binary output 2 Binary output 3 Analog output (AO) Function Drive open or stage 1 (triac) Drive close or stage 2 (triac) Interlock device (relay) Controlled actuator (0 10 Vdc) Binary output 1 and binary output 2 Binary outputs 1 and 2 are 24 Vac triac outputs that switch ac common. They can function in two different ways. They can drive a tri-state modulating actuator. For some applications it may be more cost effective to use this type of actuator rather than a 0 10 Vdc actuator. Figure 9 on page 31 shows a wiring diagram with the Tracer MP501 being used to control this type of actuator. Alternatively, binary outputs 1 and 2 can be used to control the two separate binary outputs in stages. The Tracer MP501 will first turn on stage 1 (binary output 1). Then, as the control loop senses a larger demand, stage 2 (binary output 2) will be controlled on. Figure 10 on page 32 shows a wiring diagram with the Tracer MP501 controlling staged outputs. Note: The Tracer MP501 will control only one actuator. You cannot have both a 0 10 Vdc actuator and a tri-state modulating actuator connected to the controller at the same time. Binary output 3 This binary output is a relay with a maximum current draw of 1 A. This relay will be energized whenever the control loop in the Tracer MP501 is enabled and de-energized when the control loop is disabled (see Loop enable/disable on page 36). Typically, this relay will control a fan or pump. If the control loop is disabled, the interlock relay is de-energized. CNT-SVX08B-EN 29

40 Chapter 6 Applications for generic mode AO: Analog output The analog output on the Tracer MP501 controller is a 0 10 Vdc outmp501put with a maximum current draw of 10 ma from the connected device. Figure 11 on page 33 shows a wiring diagram with the Tracer MP501 controlling this type of actuator. Note: The Tracer MP501 will control only one actuator. You cannot have both a 0 10 Vdc actuator and a tri-state modulating actuator connected to the controller at the same time. Overriding outputs The Tracer MP501 includes a manual output test. Use this feature to manually control the outputs in a defined sequence. For more information, see Manual output test on page 58. Wiring diagrams The following figures show the Tracer MP501 outputs wired in three different ways. Figure 9 on page 31 shows the Tracer MP501 controlling a tri-state modulating actuator. The Tracer MP501 controlling staged outputs is shown in Figure 10 on page 32. Figure 11 on page 33 shows an application with the Tracer MP501 controlling an analog (0 10 Vdc) actuator. 30 CNT-SVX08B-EN

41 Wiring diagrams Figure 9. Input/output wiring for generic applications with the Tracer MP501 controlling a tri-state modulating actuator Tri-state modulating actuator Not used Interlock device on/off H 24 Vac N Open Close Not used GND 24V 24V 1 24V 2 24V 3 AC POWER BINARY OUTPUTS OUT GND AO STATUS LED SERVICE LED PIN COMM5 BI AI ZONE SENSOR A B A B BI 1 GND +20 AI1 SET GND ZN COMM5 LED LonTalk communication link In Out Not used + GND Typical 3-wire sensor Enable/disable or generic input CNT-SVX08B-EN 31

42 Chapter 6 Applications for generic mode Figure 10. Input/output wiring for generic applications with the Tracer MP501 controlling staged outputs Stage 2 Stage 1 Interlock device on/off H 24 Vac N Not used GND 24V 24V 1 24V 2 24V 3 AC POWER BINARY OUTPUTS OUT GND AO STATUS LED SERVICE LED PIN COMM5 BI AI ZONE SENSOR A B A B BI 1 GND +20 AI1 SET GND ZN COMM5 LED LonTalk communication link In Out Not used 24 Vac Trane CO 2 sensor 5 Not used Enable/disable or generic input 32 CNT-SVX08B-EN

43 Wiring diagrams Figure 11. Input/output wiring for generic applications with the Tracer MP501 controlling an analog (0 10 Vdc) actuator Interlock device on/off H 24 Vac N Not used Analog output (0 10 Vdc) GND 24V 24V 1 24V 2 24V 3 AC POWER BINARY OUTPUTS OUT GND AO STATUS LED SERVICE LED PIN COMM5 BI AI ZONE SENSOR A B A B BI 1 GND +20 AI1 SET GND ZN COMM5 LED LonTalk communication link In Out Not used Not used + Typical 2-wire sensor Enable/disable or generic input CNT-SVX08B-EN 33

44 Chapter 6 Applications for generic mode 34 CNT-SVX08B-EN

45 Chapter 7 Sequence of operations for generic mode A Tracer MP501 controller configured in generic mode will control a variety of applications. The Tracer MP501 controls a process based on an input that is one of the following: Temperature Percent Pressure Flow Parts per million (ppm) Note: The generic mode applications do not follow a LonMark profile. Power-up sequence When 24 Vac power is initially applied to the Tracer MP501 controller, the following sequence occurs: 1. The Status LED goes on. 2. All the outputs are turned off. 3. The controller reads all the inputs to determine their initial values. 4. A user-adjustable (Power Up Control Wait) delay timer begins. If set to less than 10 seconds, a 10-second wait will be applied. 5. The Status LED goes off. 6. The delay timer expires. 7. The Status LED goes on. 8. If a hard-wired input (4 20 ma) is not detected and no value has been communicated, the actuator output will override to closed and a Process Input Failure diagnostic will be generated. 9. Normal operation begins if no diagnostics have been generated. CNT-SVX08B-EN 35

46 Chapter 7 Sequence of operations for generic mode Loop enable/disable The proportional, integral, derivative (PID) control loop in the controller can be enabled by either the binary input (BI1) on the board or by a communicated signal. The communicated signal has priority over the hardware input. The PID loop will be enabled if the communicated signal is invalid and nothing is connected to the hardware input. See Table 6. Table 6. Loop enable summary Communicated signal (nviloopenable) Hardware input (BI1) The PID loop is Enable Does not matter Enabled Disable Does not matter Disabled Not valid Enable Enabled Not valid Disable Disabled Not valid Invalid Enabled If the PID loop is enabled, the controller will compare the input to its setpoint and calculate an output between 0% and 100%. The controller will take that PID output value and control the outputs appropriately. If the PID loop is disabled, the outputs will go to predefined positions. For more information about the PID loop, see Chapter 8, PID control. Relay output control Binary output 3 (relay output) is energized whenever the PID loop is enabled (see Loop enable/disable above). It is de-energized whenever the PID loop is disabled. Output types The controller can be configured to control the other outputs in one of three ways: Tri-state modulating Analog 2-stage Tri-state modulating The tri-state modulating actuator uses two triac outputs to drive the actuator either farther opened or farther closed. The controller takes the PID output of 0 to 100% and then decides which way to drive the actuator. If it should be farther opened, the controller determines how much time to turn on the open binary output in order to reach the desired position. Similarly, if the PID loop calculates that it should be farther closed, the controller determines how much time to turn on the close binary output 36 CNT-SVX08B-EN

47 Output types in order to reach the desired position. The output defaults to 50%. Overdrive logic automatically calibrates the actuator at the fully open and closed positions without continually driving the actuator, which can cause unnecessary wear. Analog The controller takes the PID output of 0 to 100% and scales it for the analog output. For example, if the analog output is configured as a 2 10 Vdc actuator, when the PID calculates a value of 50% the controller will scale it and the analog output will go to 6 Vdc. The minimum and maximum outputs of the analog output are configurable. For example, a 6 9 Vdc actuator controls a valve where 9 Vdc closes the valve and 6 Vdc opens the valve. In the configuration for the analog output, enter 9 Vdc for a PID output of 0% and 6 Vdc for a PID output of 100%. 2-stage In this mode the controller takes the PID output of 0 to 100% and turns on binary output 1 when the PID output exceeds 30%. Binary output 2 comes on when the PID output exceeds 70%. Binary output 2 goes back off when the PID output drops below 45%. Binary output 1 goes back off when the PID output drops below 5%. See Figure 12. Figure 12. Make and break limits for 2-stage O u t p u t S t a t e Active Stage 2 Inactive Active Stage 1 Inactive Break Limit 1 5% Make Limit 1 30% Break Limit 2 45% Make Limit 2 70% Actuator Command (Percent) CNT-SVX08B-EN 37

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