1 Honeywell Installation and User Manual N2 protocol for Variable Frequency Drives
2 Honeywell 1 INDEX Document: DPD00548A Version release date: 6/9/11 1. Safety Danger Warnings Earthing and earth fault protection Metasys N2 - general info N2 technical data N2 protocol N2 installation Prepare for use Programming N2 parameters and monitoring values (M5.7.3) N2 parameter descriptions N2 parameters N2 monitoring values Communications Metasys N2 interface Analogue Input (AI) Binary Input (BI) Analogue Output (AO) Binary Output (BO) Internal Integer (ADI) N2 point map Analogue inputs (AI) Binary Inputs (BI) Analogue Outputs (AO) Binary Outputs (BO) Internal Integers (ADI) Fault tracing Typical fault conditions RS-485 bus biasing Other fault conditions Quick setup Annex... 24
3 Honeywell 2 Safety 1. Safety This manual contains clearly marked cautions and warnings which are intended for your personal safety and to avoid any unintentional damage to the product or connected appliances. Please read the information included in cautions and warnings carefully. The cautions and warnings are marked as follows: = DANGER! Dangerous voltage = WARNING or CAUTION Table 1. Warning signs 1.1 Danger The components of the power unit of drive are live when the drive is connected to mains potential. Coming into contact with this voltage is extremely dangerous and may cause death or severe injury. The motor terminals U, V, W and the brake resistor terminals are live when drive is connected to mains, even if the motor is not running. After disconnecting the drive from the mains, wait until the indicators on the keypad go out (if no keypad is attached see the indicators on the cover). Wait 5 more minutes before doing any work on the connections of drive. Do not open the cover before this time has expired. After expiration of this time, use a measuring equipment to absolutely ensure that no voltage is present. Always ensure absence of voltage before starting any electrical work! The control I/O-terminals are isolated from the mains potential. However, the relay outputs and other I/O-terminals may have a dangerous control voltage present even when drive is disconnected from mains. Before connecting the drive to mains make sure that the front and cable covers of drive are closed. During a ramp stop (see the Application Manual), the motor is still generating voltage to the drive. Therefore, do not touch the components of the drive before the motor has completely stopped. Wait until the indicators on the keypad go out (if no keypad is attached see the indicators on the cover). Wait additional 5 minutes before starting any work on the drive.
4 Safety Honeywell Warnings Honeywell drive is meant for fixed installations only. Do not perform any measurements when the drive is connected to the mains. The earth leakage current of drives exceeds 3.5mA AC. According to standard EN , a reinforced protective ground connection must be ensured. See chapter 1.3. If the drive is used as a part of a machine, the machine manufacturer is responsible for providing the machine with a supply disconnecting device (EN ). Only spare parts delivered by Honeywell can be used. At power-up, power brake or fault reset the motor will start immediately if the start signal is active, unless the pulse control for Start/Stop logic has been selected. Furthermore, the I/O functionalities (including start inputs) may change if parameters, applications or software are changed. Disconnect, therefore, the motor if an unexpected start can cause danger. The motor starts automatically after automatic fault reset if the auto restart function is activated. See the Application Manual for more detailed information. Prior to measurements on the motor or the motor cable, disconnect the motor cable from the drive. Do not touch the components on the circuit boards. Static voltage discharge may damage the components. Check that the EMC level of the drive corresponds to the requirements of your supply network.
5 Honeywell 4 Safety 1.3 Earthing and earth fault protection CAUTION! The drive must always be earthed with an earthing conductor connected to the earthing terminal marked with. The touch current of drive exceeds 3.5mA AC. According to EN , one or more of the following conditions for the associated protective circuit shall be satisfied: A fixed connection and: or or a) the protective earthing conductor shall have a cross-sectional area of at least 10 mm 2 Cu or 16 mm 2 Al. b) an automatic disconnection of the supply in case of discontinuity of the protective earthing conductor. c) provision of an additional terminal for a second protective earthing conductor of the same cross-sectional area as the original protective earthing conductor. Cross-sectional area of phase conductors (S) [mm 2 ] S S < S Table 2. Protective earthing conductor cross-section The cross-sectional area of every protective earthing conductor which does not form a part of the supply cable or cable enclosure shall, in any case, be not less than: - 2.5mm 2 if mechanical protection is provided or Minimum cross-sectional area of the corresponding protective earthing conductor [mm 2 ] The values above are valid only if the protective earthing conductor is made of the same metal as the phase conductors. If this is not so, the cross-sectional area of the protective earthing conductor shall be determined in a manner which produces a conductance equivalent to that which results from the application of this table. - 4mm 2 if mechanical protection is not provided. For cord-connected equipment, provisions shall be made so that the protective earthing conductor in the cord shall, in the case of failure of the strain-relief mechanism, be the last conductor to be interrupted. However, always follow the local regulations for the minimum size of the protective earthing conductor. S 16 S/2
6 Safety Honeywell 5 NOTE: Due to the high capacitive currents present in the drive, fault current protective switches may not function properly. Do not perform any voltage withstand tests on any part of drive. There is a certain procedure according to which the tests shall be performed. Ignoring this procedure may result in damaged product.
7 Honeywell 6 Metasys N2 - general info 2. Metasys N2 - general info The N2 communications protocol is used by Johnson Controls and others to connect terminal unit controllers to supervisory controllers. It is open to any manufacturer and based upon a simple ASCII protocol widely used in the process control industry. The physical characteristics of the N2 bus are three wire RS-485 with a maximum of 100 devices over a 4,000 foot distance running at 9,600 bps. Logically, the N2 is a master-slave protocol, the supervisory controller normally being the master. Data is partitioned into common HVAC control objects, such as analogue input, analogue output, binary input and binary output. N2 messaging supports the reading, writing and overriding of these points. Additionally, there are messages defined to perform uploads and downloads of devices as well as direct memory reads and writes.
8 N2 technical data Honeywell 7 3. N2 technical data 3.1 N2 protocol Connections and communications Interface Data transfer method RS-485 RS-485 MS/TP, half-duplex Transfer cable STP (Shielded Twisted Pair), type Belden 9841 or similar Connector 2.5 mm 2 Electrical isolation Functional Metasys N2 As described in Metasys N2 Open System Protocol Specification Baud rate 9600 baud Addresses 1 to 255 Table 3.
9 Honeywell 8 N2 installation 4. N2 installation 1 Open the cover of the AC drive. DANGER The relay outputs and other I/O-terminals may have a dangerous control voltage present even when drive is disconnected from mains. Figure 1. 2 Locate the components that you will need on the AC drive to connect and run the N2 cables.
10 N2 installation Honeywell 9 DIP switches N2 terminals A = Data- B = Data A B I/O terminal (see larger picture) Grounding bar Figure Prepare for use Strip about 15 mm of the N2 cable (see specification on page 7) and cut off the grey cable shield. Remember to do this for both bus cables (except for the last device). Leave no more than 10 mm of the cable outside the terminal block and strip the cables at about 5 mm to fit in the terminals. See picture below Also strip the cable now at such a distance from the terminal that you can fix it to the frame with the grounding clamp. Strip the cable at a maximum length of 15 mm inches. Do not strip the aluminum cable shield! 5
11 Honeywell 10 N2 installation 4 Then connect the cable to its appropriate terminals on AC drive standard terminal block, terminals A and B (A = negative, B = positive). See Figure 3. RS485 terminals (A and B) A B 20 A B Figure 3. Using the cable clamp included in the delivery of the drive, ground the shield of the RS485 cable to the frame of the AC drive. 5 Cable clamp
12 N2 installation Honeywell 11 If drive is the last device on the bus, the bus termination must be set. Locate the DIP switches to the right of the control keypad of the drive and turn the switch for the RS485 bus termination resistor to position ON. Biasing is built in the termination resistor. See also step 9 on page ON Current RS485* AO1 OFF Voltage Current AI2 Voltage Current AI1 Voltage * Bus termination resistor Unless already done for the other control cables, cut free the opening on the AC drive cover for the RS485 cable (protection class IP21). 7
13 Honeywell 12 N2 installation Remount the AC drive cover and run the RS485 cables as shown in picture. NOTE: When planning the cable runs, remember to keep the distance between the fieldbus cable and the motor cable at a minimum of 30 cm. 8 RS485 cables The bus termination must be set for the first and the last device of the fieldbus line. See picture below. See also step 6 on page 11. We recommend that the first device on the bus and, thus, terminated was the Master device. 9 Drive Drive Drive Drive Drive Termination activated Fieldbus = Bus termination Termination deactivated Termination activated with DIP switch
14 Programming Honeywell Programming Basic information on how to use the control keypad you will find in the Honeywell HVAC Application Manual. The navigation path to the fieldbus parameters may differ from application to application. The exemplary paths below apply to the drive. 1. First ensure that the right fieldbus protocol is selected. Navigate: Main Menu > I/O and Hardware (M5) > RS-485 (M5.7) > Common settings (M5.7.1) > Protocol (P ) > Edit > (Choose protocol) 2. Select Fieldbus control as the Remote Control Place. Navigate: Main Menu > Quick Setup (M1) > Rem. Ctrl. Place (P1.15) OR Navigate: Main Menu > Parameters (M3) > Start/Stop Setup (M3.2) > Rem. Ctrl. Place (P3.2.1) 3. Choose source of reference. Navigate: Main Menu > Parameters (M3) > References (M3.3) 4. Set fieldbus parameters in menu M5.7. See below. 5.1 N2 parameters and monitoring values (M5.7.3) Code Parameter Min Max Unit Default ID Description PARAMETERS P Slave address Unique slave device address. P Communication time-out s 10 0 = Not used Table 4. Parameters related to N2 Code Parameter Min Max Unit Default ID Description MONITORING VALUES P Fieldbus protocol status = Init 1 = Stopped 2 = Operational 3 = Faulted P Communication status Number of messages with errors Number of messages without communication errors P Invalid data 0 P Invalid commands 0 P Command not accepted 0 P Control word hex See page 15. P Status word hex See page 15. Table 5. Monitoring values related to N2
15 Honeywell 14 Programming 5.2 N2 parameter descriptions N2 parameters P SLAVE ADDRESS Each slave must have a unique address (from 1 to 255) so that it can be addressed independently from other nodes. P COMMUNICATION TIME-OUT N2 board initiates a communication error for a time defined with this parameter. 0 means that no fault is generated N2 monitoring values P FIELDBUS PROTOCOL STATUS Fieldbus Protocol Status tells the status of the protocol. INITIALIZING STOPPED OPERATIONAL FAULTED Protocol is starting up Protocol is timeouted or not used Protocol is running Major fault in protocol, requires restarting. If fault remains contact Technical Support. Table 6. FB protocol statuses P COMMUNICATION STATUS The Communication status shows how many error and how many good messages the frequency converter has received. The Communication status includes a common error counter that counts CRC and parity errors and a counter for good messages. Only messages to the current slave in use are counted in the good messages. Good messages Number of messages received without errors Bad Frames 0 99 Number of messages received with errors Table 7. P INVALID DATA One of the fields contains a value that is out of the expected range. P INVALID COMMANDS Command not appropriate for this field or record.
16 Programming Honeywell 15 P COMMAND NOT ACCEPTED Due to problems with the device, the command is ignored. P CONTROL WORD Shows the Control Word received from the bus. P STATUS WORD Shows the current Status Word that is sent to the bus.
17 Honeywell 16 Communications 6. Communications Features of the N2-Honeywell interface: Direct control of drive (e.g. Run, Stop, Direction, Speed reference, Fault reset) Full access to all Honeywell parameters Monitor Honeywell status (e.g. Output frequency, Output current, Fault code) 6.1 Metasys N2 interface Features of the N2 Interface: Direct control of drive (e.g. Run, Stop, Direction, Speed reference, Fault reset) Full access to necessary parameters Monitor drive status (e.g. Output frequency, Output current, Fault code) In standalone operation, or should the polling stop, the overridden values are released after a specified period (about 10 minutes) Figure 4. Principal example diagram of Metasys N Analogue Input (AI) All Analogue Input (AI) points have the following features: Support Change of State (COS) reporting based on high and low warning limits. Support Change of State (COS) reporting based on high and low alarm limits. Support Change of State (COS) reporting based on override status. Always considered reliable and never out of range. Writing of alarm and warning limit values beyond the range that can be held by the drive's internal variable will result in having that limit replaced by the "Invalid Float" value even though the message is acknowledged. The net result will be the inactivation of the alarm or warning (the same as if the original out of range value was used). Overriding is supported from the standpoint that the "Override Active" bit will be set and the value reported to the N2 network will be the overridden value. However, the value in the drive remains unchanged. Therefore, the N2 system should be set up to disallow overriding AI points or have an alarm condition activated when an AI point is overridden. Overriding an AI point with a value beyond the limit allowed by the drive's internal variable will result in an "Invalid Data" error response and the override status and value will remain unchanged.
18 Communications Honeywell Binary Input (BI) All Binary Input (BI) points have the following features: Support Change of State (COS) reporting based on current state. Support Change of State (COS) reporting based on alarm condition. Support Change of State (COS) reporting based on override status. Always considered reliable. Overriding is supported from the standpoint that the "Override Active" bit will be set and the value reported to the N2 network will be the overridden value. However, the value in the drive remains unchanged. Therefore, the N2 system should be set up to disallow overriding BI points or have an alarm condition activated when a BI point is overridden Analogue Output (AO) All Analogue Output (AO) points have the following features: Support Change of State (COS) reporting based on override status. Always considered reliable. Overriding of the AO points is the method used to change a value. Overriding an AO point with a value beyond the limit allowed by the drive's internal variable will result in an "Invalid Data" error response and the override status and value will remain unchanged. If the overridden value is beyond the drive's parameter limit but within the range that will fit in the variable, an acknowledge response is given and the value will be internally clamped to its limit. An AO point override copies the override value to the corresponding drive parameter. This is the same as changing the value on the keypad. The value is non-volatile and will remain in effect when the drive is turned off and back on. It also remains at this value when the N2 network "releases" the point. The N2 system always reads the current parameter value. NOTE: On some N2 systems, the system will not poll the AO point when it is being overridden. In this case, the N2 system will not notice a change in value if the change is made with the keypad. To avoid this, set the point up as a "local control" type and release it once it has been overridden. In this way, the N2 system will monitor the value when not being overridden Binary Output (BO) All Binary Output (BO) points have the following features: Support Change of State (COS) reporting based on override status. Always considered reliable. Overriding BO points control the drive. These points are input commands to the drive. When released, the drive's internal value remains at its last overridden value Internal Integer (ADI) All Internal Integer (ADI) points have the following features: Do not support Change of State (COS) reporting. Can be overridden and the "Override Active" bit will be set. However, the Internal value is unchanged (Read Only).
19 Honeywell 18 Communications 6.2 N2 point map Analogue inputs (AI) NPT NPA Description Units Note AI 1 Speed Setpoint Hz 2 decimals AI 2 Output Frequency Hz 2 decimals AI 3 Motor Speed Rpm 0 decimals AI 4 Load (power) % 1 decimal AI 5 Megawatt Hours MWh Total Counter AI 6 Motor Current A 2 decimals AI 7 Bus Voltage V 0 decimals AI 8 Motor Volts V 1 decimal AI 9 Heatsink Temperature F 0 decimals AI 10 Motor Torque % 1 decimal AI 11 Operating Days (trip) Day 0 decimals AI 12 Operating Hours (trip) Hour 0 decimals AI 13 Kilowatt Hours (trip) kwh Trip Counter AI 14 Torque Reference % 1 decimal AI Binary Inputs (BI) Motor Temperature Rise % 1 decimal AI 16 FBProcessDataOut1 1) to decimals AI 17 FBProcessDataOut2 1) to decimals AI 18 FBProcessDataOut3 1) to decimals AI 19 FBProcessDataOut4 1) to decimals AI 20 FBProcessDataOut5 1) to decimals AI 21 FBProcessDataOut6 1) to decimals AI 22 FBProcessDataOut7 1) to decimals AI 23 FBProcessDataOut8 1) to decimals 1) These analogue inputs are application specific Table 8. NPT NPA Description 0 = 1 = BI 1 Ready Not Ready Ready BI 2 Run Stop Run BI 3 Direction Clockwise Counterclockwise BI 4 Faulted Not Faulted Faulted Table 9.
20 Communications Honeywell 19 NPT NPA Description 0 = 1 = BI 5 Alarm Not Alarm Alarm BI 6 Ref. Frequency reached False True BI 7 Motor running zero speed False True BI 8 Flux ready Not ready Ready Table Analogue Outputs (AO) NPT NPA Description Units Note AO 1 Comms Speed % 2 decimals AO 2 Current Limit A 2 decimals AO 3 Minimum Speed Hz 2 decimals AO 4 Maximum Speed Hz 2 decimals AO 5 Accel Time s 1 decimal AO 6 Decel Time s 1 decimal AO 7 FBProcessDataIN 1 1) to decimals AO 8 FBProcessDataIN 2 1) to decimals AO 9 FBProcessDataIN 3 1) to decimals AO 10 FBProcessDataIN 4 1) to decimals AO 11 FBProcessDataIN 5 1) to decimals AO 12 FBProcessDataIN 6 1) to decimals AO 13 FBProcessDataIN 7 1) to decimals AO 14 FBProcessDataIN 8 1) to decimals AO 15 Any parameter Read/Write - 1) These Analogue Outputs are application specific Binary Outputs (BO) Table 10. Depends on parameter NPT NPA Description 0 = 1 = BO 1 Comms Start/Stop Stop Start BO 2 Comms Forward/Reverse Forward Reverse BO 3 Reset Fault N/A Reset BO 4 Stop mode information BO 5 Stop mode information BO 6 Force ramp to zero - - Table 11.
21 Honeywell 20 Communications NPT NPA Description 0 = 1 = BO 7 Freeze ramp - - BO 8 Reference to zero - - BO 9 BusCtrl - - BO 10 BusRef - - Table Internal Integers (ADI) NPT NPA Description Units ADI 1 Active Fault Code - ADI 2 Control Word - ADI 3 Status Word - ADI 4 Any parameter ID - Table 12.
22 Fault tracing Honeywell Fault tracing When an unusual operating condition is detected by the AC drive control diagnostics, the drive initiates a notification visible, for example, on the keypad. The keypad will show the ordinal number of the fault, the fault code and a short fault description. The fault can be reset with the Reset button on the control keypad or via the I/O terminal. The faults are stored in the Fault history menu which can be browsed. The different fault codes you will find in the table below. This fault table presents only the faults related to the fieldbus in use. NOTE: When contacting distributor or factory because of a fault condition, always write down all texts and codes on the keypad display and send a description of the problem together with the Drive Info File to Honeywell Technical Support. 7.1 Typical fault conditions Fault condition Termination resistor Cabling Grounding Connections Parameter Possible cause Missing or excessive termination resistor. Supply or motor cables are located too close to the fieldbus cable Wrong type of fieldbus cable Too long cabling Inadequate grounding. Faulty connections. Excessive stripping of cables Conductors in wrong terminals Too loose connections of conductors Faulty address Overlapping slave addresses Wrong baud rate Wrong control place selected Remedy Install termination resistors at both ends of the fieldbus line. Ensure grounding in all points on the net Table 13. Typical fault conditions 7.2 RS-485 bus biasing When none of the devices on the RS-485 bus is sending data all devices are in idle status. This being the case, the bus voltage is in indefinite state, usually near 0 V due to the termination resistors. This may cause problems in character reception because the single characters in serial communication begin with start bit referring to bus status '0' with voltage of less than - 200mV whereas the bus status '1' corresponds to bus voltage of more than +200mV. The RS- 485 standard considers the voltage interval -200mV mV as undefined state. Bus biasing is therefore needed to maintain the voltage in status 1 (above +200mV) also between the messages. To bias the bus you will have to add a separate active termination resistor specifically designed for the RS-485 bus (e.g. Siemens active RS 485 terminating element (6ES7972-0DA00-0AA0).
23 Honeywell 22 Fault tracing 7.3 Other fault conditions The following fault tracing diagram will help you to locate and fix some of the most usual problems. If the problem persists contact your local distributor. Drive does not start from the bus No communication Poor communication Check communication status (par ) Counter does not run Counter for bad frames (see Table 3) increases Counter OK. Check fieldbus parameters Check selected protocol (M ) Check other fieldbus parameters in menu M5.7 Check termination resistors Check that both ends of the fieldbus line have termination resistors (chapter 4.1) Check parameters Is the device in READY state? Check the led on keypad Check external interlockings (I/O) Check Master s parameters Check configurations (Slave address, baudrate etc.) Check cabling Check distances between cables, see chapter 4.1. Check cable types, see chapter 3. Is fieldbus selected as control place? Check parameter M1.15 or M3.2.1 Check termination resistors Check that both ends of the fieldbus line have termination resistors (chapter 4.1) Check grounding Check grounding, see chapter 4. Remember to make grounding for each device! Does Master give RUN command? Use keypad to monitor variable M Set variable ADI2 to 1 Check cabling Check cable for cuts Check correct placement of conductors in terminals Check connections Check stripping of cables and conductors, see chapter 4. Check terminals for loose connections Other bus devices Check other necessary devices (e.g. router) Figure 5. Fault tracing diagram for N2
24 Quick setup Honeywell Quick setup Following these instructions, you can easily and fast set up your N2 bus for use: 1 2 Choose control place. A. Press LOC/REM button on keypad to select Remote Control Place B. Select Fieldbus as remote control place: Main Menu > Quick Setup (M1) > Rem. Ctrl. Place (P1.15) > FieldbusCTRL Make these settings in the master software C. Set Control Word to 0 (ADI2) D. Set Control Word to 1 (ADI2) E. Frequency converter status is RUN F. Set Reference value to 50.00% (AO1) G. Output Frequency (AI2) is 25.00Hz if MinFreq is 0.00 Hz and MaxFreq is Hz H. Set Control Word to 0 (ADI2) I. Frequency converter status is STOP.
25 Honeywell 24 Annex 9. Annex Process Data IN (Master to Slave) Use of Process Data In variables depends on the used application. The configuration of the data is free. Process Data OUT (Slave to Master) Use of Process Data Out variables depends on the used application. The Fieldbus Master can read the frequency converter s actual values using process data variables. Control applications use process data as follows: ID Data Value Unit Scale 2104 Process data OUT 1 Output Frequency Hz 0,01 Hz 2105 Process data OUT 2 Motor Speed rpm 1 rpm 2106 Process data OUT 3 Motor Current A 0,1 A 2107 Process data OUT 4 Motor Torque % 0,1 % 2108 Process data OUT 5 Motor Power % 0,1 % 2109 Process data OUT 6 Motor Voltage V 0,1 V 2110 Process data OUT 7 DC link voltage V 1 V 2111 Process data OUT 8 Active Fault Code - - Table 14. Process Data OUT variables
26 Find out more For more information on Honeywell s variable frequency drives and other Honeywell products, visit us online at Automation and Control Solutions Honeywell GmbH Böblinger Str Schönaich, Germany Telephone (49) Telefax (49) EN2B-0374GE51 R1210 December Honeywell International Inc.
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SureSERVO QUICK START GUIDE APPENDIX BA In This Appendix... Quick Start for SureServo Drives.............A 2 Spin the Motor......................................A 2 Position Mode Quick Start (Pt & Pr)......................A
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ACS800 Firmware Manual ACS800 Pump Control Application Program 7.2 (+N687) ACS800 Pump Control Application Program 7.2 Firmware Manual 3AFE68478952 REV D EN EFFECTIVE: 2012-03-01 2012 ABB Oy. All Rights
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$25.00 BDI 1100 Frequency Inverter Installation and Operating Manual 12/96 MN71100 Table of Contents Section 1 General Information............................. 1-1 Introduction....................................
Part Number 129777-01 Revision A, January 1996 3500 Monitoring System Rack Configuration and Utilities Guide Copyright 1995 Bently Nevada Corporation All Rights Reserved. No part of this publication may
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to RS422/RS485 Isolated Universal Converter 1. Introduction The converts serial data from the standard to either RS422 or RS485. Features: Universal converter can be used with both and other manufacturer
MAGPOWR TENSION CONTROL MAGPOWR Spyder Tension Control Instruction Manual Figure 1 EN Spyder and Spyder-Plus MI 850A320 1 J COPYRIGHT All of the information herein is the exclusive proprietary property