Page 1
VLT® HVAC Drive Training Session Hand Outs www.danfossdrives.com...
Page 2
Danfoss FC Drive LCP Display Layout Danfoss FC drives have a total of 5 possible variables that can be set up and displayed to the user. There are also three status message fields at the bottom of the display. These three Drive Status fields tell you the Type of Control and Reference Site currently in use, and the Operation Status shows how the drive is operating or what it is being commanded to do. These displays are very powerful tools for setting up and troubleshooting a system. It is good practice to set them up when commissioning a drive. They are labeled: Display Line 1.1 Small (P 0‐20) Display Line 1.2 Small (P 0‐21) Display Line 1.3 Small (P 0‐22) Display Line 2 Large (P 0‐23) Display Line 3 Large (P 0‐24) The illustrations below show the layout of the display and the five configurable display variables. You can display the variables in several different ways. There are three display screen options that can be shown when pressing the Status button. Repeated pressing of the Status button will advance through the three display screen options shown below. Each of the three display screens will show Drive Status Messages on the bottom line. 1.1 1.2 1.3 2 Small Small Small Large ...
Page 3
Available LCP Display Variables Operating variable Unit Operating variable Unit [0] None (No display value) P 16‐53 Digi Pot Reference P 0‐15 Readout: actual setup P 16‐54 Feedback 1 Unit P 0‐37 Display Text 1 P 16‐55 Feedback 2 Unit P 0‐38 Display Text 2 P 16‐56 Feedback 3 Unit P 0‐39 Display Text 3 P 16‐58 PID Output % P 0‐89 Date and Time Readout P 16‐59 Adjusted Setpoint % P 13‐97 Alert Alarm Word ...
Page 4
Danfoss FC Drive LCP Bottom Line Status Messages 1 Type of Control 2 Reference Site 3 Operation Status GROUP 1 – First (left) word: Type of Control Operating mode Description The navigation keys on the LCP can be used to control the drive. Stop commands, reset, Hand reversing, DC brake, and other signals applied to the control terminals override local control. Off The drive does not react to any control signal until Auto On or Hand On is pressed. The drive requires external commands to execute functions. The start/stop commands are Auto sent via the control terminals and/or the serial communication. GROUP 2 – Second (middle) word: Reference Site Reference site Description Local The drive uses reference values from the LCP. The speed reference is given from external signals, serial communication, and/or internal Remote preset references. NOTE: The Reference Site is determined by P 3‐13. The default value is [0] Linked to Hand/Auto. ...
Page 5
GROUP 3 – Third (right) word: Operation Status Operation status Description AC brake was selected in parameter 2‐10 Brake Function. The AC brake over‐magnetizes the AC brake motor to achieve a controlled slow down. AMA finish OK Automatic motor adaptation (AMA) was carried out successfully. AMA ready AMA is ready to start. To start, press Hand On. AMA running AMA process is in progress. Braking The brake chopper is in operation. The brake resistor absorbs the generative energy. The brake chopper is in operation. The power limit for the brake resistor defined in Braking max. parameter 2‐12 Brake Power Limit (kW) has been reached. PROFIDrive profile was selected in par. 8‐10 Control Word Profile. Via serial communication Bus Jog 1 the Jog 1 function is activated. The Motor is running with par. 8‐90 Bus Jog 1 Speed. PROFIDrive profile was selected in par. 8‐10 Control Word Profile. Via serial communication Bus Jog 2 the Jog 2 function is activated. The Motor is running with par. 8‐91 Bus Jog 2 Speed. The output frequency is corrected by the value set in par. 3‐12 Catch up/slow Down Value. 1. Catch up is selected as a function for a digital input (parameter group 5‐1* Digital Inputs). Catch up The corresponding terminal is active. 2. Catch up was activated via serial communication. • 2 Coast inverse was selected as a function for a digital input (parameter group 5–1* Digital Coast Inputs). The corresponding terminal is not connected. • Coast activated by serial communication. PROFIDrive profile was selected in par. 8‐10 Control Word Profile. The FC needs the second Control ready part of the two‐part serial start command (e.g. 0x047F) via serial communication to allow starting. Using an input terminal is not possible. 1 Ctrl. ramp‐down was selected in parameter 14‐10 Mains Failure. Ctrl. ramp‐ • Mains voltage is below the value set in parameter 14‐11 Mains Voltage at Mains Fault. down • The drive ramps down the motor in a controlled manner. ...
Page 6
GROUP 3 – Third (right) word: Operation Status Operation status Description The remote reference is active, which holds the present speed. • 20 Freeze Output was selected as a function for a digital input (parameter group 5–1* Freeze output Digital Inputs). The corresponding terminal is active. Speed control is only possible via the terminal functions speed up and speed down. • Hold ramp is activated via serial communication. Freeze output A freeze output command has been given, but the motor remains stopped until a run request permissive signal is received. 19 Freeze Reference was selected as a function for a digital input. The corresponding Freeze ref. terminal is active. The drive saves the actual reference. Changing the reference is now only possible via terminal functions speed up and speed down. A jog command has been given, but the motor is stopped until a run permissive signal is Jog request received via a digital input. The motor is running as programmed in parameter 3‐19 Jog Speed RPM. • 14 Jog was selected as function for a digital input (parameter group 5–1* Digital Inputs). The corresponding terminal (for example, terminal 29) is active. Jogging • The jog function is activated via the serial communication. • The jog function was selected as a reaction for a monitoring function (for example, No signal). The monitoring function is active. In par. 14‐10 Mains Failure a function was set as Kinetic back‐up. The Mains Voltage is below Kinetic back‐up the value set in par. 14‐11 Mains Voltage at Mains Fault. The FC is running the motor momentarily with kinetic energy from the inertia of the load. In parameter 1‐80 Function at Stop, 2 Motor Check was selected. A stop command is active. Motor check To ensure that a motor is connected to the drive, a permanent test current is applied to the motor. PROFIDrive profile was selected in par. 8‐10 Control Word Profile. Via serial communication Off1 the OFF 1 function is activated. The Motor is stopped via the ramp. PROFIDrive profile was selected in par. 8‐10 Control Word Profile. Via serial communication Off2 the OFF 2 function is activated. The output of the FC is disabled immediately, and the motor ...
Page 7
GROUP 3 – Third (right) word: Operation Status Operation status Description The motor is accelerating/decelerating using the active ramp up/down. The reference, a limit Ramping value, or a standstill is not yet reached. The sum of all active references is above the reference limit set in parameter 4‐55 Warning Ref. high Reference High. The sum of all active references is below the reference limit set in parameter 4‐54 Warning Ref. low Reference Low. Run on ref. The drive is running in the reference range. The feedback value matches the setpoint value. A start command has been given, but the motor is stopped until a run permissive signal is Run request received via digital input. Running The drive is driving the motor. (FC 100/200 only) The boost function in parameter 4‐06 Boost setpoint is enabled. This Sleep Boost function is only possible in Closed loop operation. The energy‐saving function is enabled. This function being enabled means that now the Sleep mode motor has stopped, but that it restarts automatically when required. The output frequency is corrected by the value set in par. 3‐12 Catch up/slow Down Value. 1. Slow Down was selected as a function for a digital input (parameter group 5–1* Digital Slow down Inputs). The corresponding terminal is active. 2. Slow Down was activated via serial communication. Speed high The motor speed is above the value set in parameter 4‐53 Warning Speed High. Speed low The motor speed is below the value set in parameter 4‐52 Warning Speed Low. In auto‐on mode, the drive starts the motor with a start signal from a digital input or serial Standby communication. In parameter 1‐71 Start Delay, a delay starting time was set. A start command is activated, Start delay and the motor starts after the start delay time expires. ...
Page 8
Danfoss FC Drive Power & Control Terminals * Terminal 37 (optional) is used for Safe Torque Off. ...
Page 9
Danfoss FC Drive Terminal Configurations & Functions Type Function Terminal # Label Notes LINE 91, 92, 93 L1, L2, L3 3‐Phase Power Input POWER MOTOR 96, 97, 98 U, V, W 3‐Phase Motor Output TERMINALS DC BUS 88, 89 DC‐, DC+ DC Bus Connections DIGITAL INPUTS 18, 19, 32, 33 D IN Digital Input (0V or 24VDC) DIGITAL IN OR OUT 27, 29 D IN/OUT Configurable for Digital Input or Output (0V or 24VDC) CONTROL DIGITAL INPUT 37 D IN Safe Torque Off (STO) (optional) TERMINALS ANALOG INPUTS 53, 54 A IN 0 to +10VDC or 0/4mA to 20mA ANALOG OUTPUT 42 ...
Page 10
Terminal Block Functions & Programming (P 0‐03 North American Default) Serial Comm. Connector Digital Input / Output Connector Analog Input / Output Connector [39] AO Common [61] SIG COM [12,13] +24VDC [42] AO Speed (P 6‐50) [37] 19) STO (P 5‐ [18] Start (P 5‐10) [50] +10VDC [20] DI Common [19] No Operation (P 5‐11) [53] Ref Resource 1 (P 6‐1*) [33] No Operation (P 5‐15) [27] Ext. Interlock (P 5‐12) [54] Feedback (P 6‐2*) [68] (+) RS485 Interface [29] Jog (P 5‐13) [55] AI Common [69] (‐) RS485 Interface [32] No Operation (P 5‐14) ...
Page 11
Danfoss FC Series VFD Reference Handling This tutorial will explain how to interpret the reference parameters and achieve the desired results. The first step in the setup requires you to set up parameters in the P 3‐0* parameter group and enter your desired minimum and maximum references, which can be entered in P 3‐02 & P 3‐03. No matter which reference unit you will be working in, these are the lowest and highest allowable values to be commanded to the VFD. Next, for P 3‐04, there are two available choices, Sum or External / Preset. When Sum is selected, any terminal programmed as a reference resource, including digital inputs, analog inputs, preset references or serial bus references will be added together to produce the total speed reference. Each of these different possible reference resources can be scaled to produce a certain percentage of the P 3‐03 Maximum Reference. When External / Preset has been selected, the drive will respond to either only preset references OR the sum of all the external reference resources as described above. The drive will toggle between the two using a digital input, as shown below. ...
Page 12
The references will now need to be defined. This is done in the P 3‐1* parameter group. P 3‐10, P 3‐15, P 3‐16 & P 3‐17 are all parameters that will allow you set up the reference sources. If you want to use multiple reference points, then they must also be defined here. Most applications will only use one reference terminal rather than multiples. If using only one reference terminal, set the single reference source in P 3‐15, and program all other resources to [0] No Function. This is good practice because of the Sum function described earlier. Note: If other terminals are programmed as reference resources but not actually used, any signal that is present on those terminals will be summed into the total reference value. After the reference sources have been defined, the next step is to scale them. The analog inputs are programmed in P 6‐1* & P 6‐2*. For the example above, Analog Input 53 must now be scaled. You will need to set a low and high voltage or current as well as a low and high reference value. See below. Be aware that if multiple reference sources are chosen, then each can be scaled individually to contribute the desired portion of your maximum reference. Example: Analog Input 53 = 0‐10 V = 0‐50 Hz & Analog Input 54 = 0‐10 V = 0‐10 Hz. Now Analog Input 53 will command the first 50 Hz and Analog Input 54 will act as a trim for the last 10 Hz. ...
Page 13
Danfoss FC Series Quick Start‐up Sheet 1. Set Main Menu P 0‐03 to [1] North America. Ignore the Alarm 60 for now. 2. Place a jumper wire between terminals 12 & 27 if a safety interlock will not be used. Alternatively, programming terminal 27 via P 5‐12 to the value [0] No operation will eliminate the need for a contact. If a Normally Closed safety contact will be used, wire it between terminals 12 & 27 and program it accordingly. Press the reset key to clear the Alarm 60 if it is still present. 3. Press the Quick Menu button, then go to Q2 Quick Setup to enter the following items. Parameter Description Unit Notes P 0‐01 Language Select desired LCP menu language P 1‐21 Motor Power HP HP Enter motor horsepower P 1‐22 Motor Voltage V Enter motor voltage P 1‐23 Motor Frequency Hz Enter motor frequency P 1‐24 Motor Current A Enter motor current P 1‐25 ...
Page 14
Danfoss FC Series Control Wiring Testing Danfoss FC drives have a built‐in diagnostic feature that allows you to validate that the control wiring is correct. Power‐on the drive and follow the steps below to check your wiring. If there is a problem, ask your instructor for help. Digital Input Checks First you need to check if the digital inputs are functioning correctly. Use the Main Menu button to navigate to P 16‐60. You will see the screen below, which displays a binary number that represents the status of the digital inputs. When the switch is closed associated with the corresponding terminal, the 0 will change to a 1, if the input is working properly. Close switches 18, 19, 27, 29, 32, & 33 one at a time to see if the digital inputs are wired and functioning correctly. DIN1 DIN2 DIN3 DIN4 DIN5 DIN6 18 19 27 29 32 33 Analog Input Checks ...
Page 15
MCT 10 Setup Software Tutorial Danfoss MCT 10 Software is a free download and can be found at DanfossDrives.com. Click on the Service and support link, then select the Downloads link. 1 2 Next, select Drives from the list on the left side under Business unit. 3 Scroll down until you find the VLT Motion Control Tool MCT 10, then click the link to go to the download page. 4 Download the latest version of the MCT 10 Software Tool by clicking on the link in the Download column, as shown below. 5 ...
Page 16
A license key for a more advanced version can be purchased, however it is rarely necessary. When you begin the installation on your PC, you will be prompted to enter a CD Key & License Key. 12314600 The CD key is: No license key is required if you click the box found in the bottom left corner that says Install Basic Version with Limited Functionality MCT 10 makes complex programming schemes much simpler for the user. A USB cable can be connected to the drive and parameter settings changed via MCT 10 will be written to the drive in real time. Alternatively, a Project can be created within the software where the user can edit the parameter settings without being connected to the drive. A USB cable can later be connected to the drive and the parameters can be downloaded. Existing VFD programming can also be uploaded and saved as projects within MCT 10. In addition, the software contains wizards to help create Smart Logic programs to set up cascade systems and time‐based actions. Creating a project and adding a new project drive 1. Open MCT 10 2. In the upper left menu, right click Project and select Add New Drive. The project can be renamed, if desired. 3. Name the project drives that you are creating (multiple drives can be added to a project). 4. Fill out the remaining fields for the project drive that match those of the actual drive that will be connected to later (Series, Power Size, Configurable Options, Software Version, and ...
Page 17
Changing the drive parameters Now that you have created a project drive, you can begin to manipulate the parameters. The project drive should have identical parameters to the actual drive you will connect to later if you entered the correct data when setting it up. Click the + next to the newly created project drive to expand the menu Click the + next to All Parameters to access the main menu parameters Click the + next to the main menu parameter group that you want to access Click the sub parameter group that the desired parameter resides in Double click the actual parameter of interest (under setup 1) and use the drop‐ down menus to make your selection Click the OK button to accept the change Saving & opening a project file (.SSP) When you have finished editing the drive parameters you will need to save the project file. Click File from the tool bar at the top of the screen and then choose Save As from the drop‐down menu. Name the file and click Save (it will be saved with a .SSP file extension). You can now close the program. Locate the .SSP file that you saved and open it. The project will reopen, and the project drive will appear with the same parameter settings that you had programmed previously. ...
Page 18
Reading from a drive Drives that were previously programmed and operating in the field can be backed up to an MCT 10 project file. There are 2 ways to accomplish this. To back up a drive’s active parameter settings to project file, follow the instructions listed below. Method 1 Connect to a live drive via USB or serial communication Highlight the connected drive with the mouse Right click, select Copy and wait until it’s finished Highlight the project, right click and select Paste Method 2 Open MCT 10 and create a new project drive that mimics the actual drive Highlight the project drive of interest that has default settings Right click, select Read from Drive and wait until it’s finished The project drive will now have the same parameter settings as the actual drive. You can save the project (File –> Save As) to your laptop and the settings will now be securely stored. This guide is just a basic introduction of MCT 10 setup software functionality, and there are many other features that have not been discussed. Take some time to explore the software and uncover some useful features on your own. Right clicking will often bring up other available options including comparisons, scope traces, copy & paste features and a whole lot more. ...
Page 19
VLT HVAC Drive Lab # 1 Local Control using the LCP (Local Control Panel) Introduction In this lab you will set up a VLT HVAC drive to operate in Hand Mode. This is the simplest form of operation and consists of using the drive’s LCP to operate the drive manually. No external control wiring is required. If your control box is connected, set all switches to OFF. You will use the Quick Setup menu to set up the basic parameters required for local control. Behavioral Objectives Learn how to access the FC 102’s software quick menus Program & understand the Quick Setup parameters Start the drive and change the motor speed using the LCP (Local Control Panel) ...
Page 20
Mechanical Setup 1. Connect the motor to the drive. 2. Plug in the demo drive’s power cord into a 120 Vac outlet. Software Setup 1. Perform an Initialization to reset all parameters to the factory default values. With power off, simultaneously hold down the Status, Main Menu & OK buttons. 2. Apply power and continue to hold the three buttons. Release the buttons after the LCP’s backlight flashes off then on again. The LCP should then display INITIALIZING. 3. Exit the Smart Start wizard by pressing Status and then OK. If the LCP displays Drive initialized [A80], it confirms that the default settings have been restored. If not, repeat steps one & two. Press the Reset button to clear the Alarm 80. 4. Press the Off button to prevent unintended operation during setup. 5. Press the Main Menu button and navigate to P 0‐03. Use the OK button and arrow buttons to change this value to [1] North America to configure the drive for North American default values of 60Hz vs 50Hz, HP vs kW, etc. This also changes the function for terminal 27 from Coast Inverse to External Interlock, generating an External Interlock [A60] alarm. Ignore the Alarm 60 for now. 6. Press the Quick Menu button, arrow down to Q2 Quick Setup, and press the OK to enter the Q2 Quick Setup menu. ...
Page 21
7. There is a collection of commonly used parameters in the Q2 Quick Setup menu. Use the up and down arrow buttons to scroll through the following parameters and enter the following data: Parameter Description Field Demo Motors Training Lab Motors P 0‐01 Language English English P 1‐21 Motor Power HP 0.33 Hp 0.75 Hp P 1‐22 Motor Voltage 230 V 230 V P 1‐23 Motor Frequency 60 Hz 60 Hz P 1‐24 Motor Current 0.30 A 2.90 A P 1‐25 Motor Nominal Speed 1750 RPM 1750 RPM P 1‐28 Motor Rotation Check [0] Off [0] Off P 3‐41 Ramp 1 Ramp Up Time 5 sec 5 sec ...
Verifying Operation 1. Press the Status button to show your display screen. 2. Since Digital Input 27 (P 5‐12) has been programmed for [0] No Operation the Alarm 60 should have automatically reset. Press the Reset button if it hasn’t. 3. Press the Hand On button to start the drive. The bottom‐line status message of the display should read Hand Local Run on ref. Notice however that the motor is not spinning. It is running at zero speed. Enter a local speed reference using the arrows and the motor should follow. Be mindful of the decimal point. 4. Press the Off key on the LCP. You should notice the drive ramps down to a stop following the ramp down time that you set in P 3‐42. The status line should now read Off Local Stop indicating that the Off key was pressed, and the drive is in the Stop condition. 5. Press Hand on. Notice how the local reference takes over display lines 2 and 3. How can you know what actual speed is? 6. Remember that the displayed values are user selectable. Change P 0‐21 to the choice [1613] Frequency. Now the output frequency will show in display line 1.2. Over‐speeding It is occasionally required to run faster than 60Hz. Which parameter sets the high‐speed limit? Increase this parameter to 65Hz and note what happens to the bar graph in the bottom of the local reference display. Can you now run above 60Hz? ...
Page 23
VLT HVAC Drive Lab # 2 Open Loop Speed Control Introduction In this lab, you will set up a VLT HVAC drive to simulate an air handler application. The drive will be set up in an Open Loop configuration. In an open loop configuration, a speed reference signal fed into the drive determines the speed it will run at. The drive will receive the control signals by means of a Building Management System (BMS). The BMS will provide the VFD with an enable command, a start/stop command and a 0‐10 Vdc speed reference. The drive itself will have two relay outputs programmed to indicate when it is running, and another to indicate an alarm situation. For this lab, you will use the control box provided to you to simulate the BMS I/O signals. Behavioral Objectives Identify the drive’s power connections and control card terminals Program the necessary drive parameters for basic open loop control Use the drive’s data readouts to verify that the control signals are working correctly Upload a working set of parameters to the LCP ...
Page 24
In order to familiarize yourself with the I/O, answer the following questions. Refer to your documentation if necessary. Which terminals should the input voltage be connected to? ____ ____ ____ Which terminals should the motor be connected to? ____ ____ ____ Write down the terminal numbers for relay # 1 ____ ____ ____ Write down the terminal numbers for relay # 2 ____ ____ ____ A B C Which terminal block is the Analog I/O? Which terminal block is the Digital I/O? A B C Which block is the Serial Communication? A B C Which 2 terminals are the +24 Vdc supply? ____________________________________________ ...
Page 25
Mechanical Setup 1. Connect the motor to the drive. 2. Connect the I/O Test Box to the control card & relays as shown. Ensure all DIN switches are turned OFF. Analog & Digital Drive Plug‐in Connector Locations Connector Blocks Relay 1 & 2 Connector Blocks Analog & Digital I/O Test Box Configuration for Lab Tests (Pre‐Wired as shown) R02 R01 ...
Page 26
Analog & Digital I/O Test Box Wiring Schematic Test Box Pre‐Wired as shown ANALOG INPUT 53 ANALOG INPUT 54 DIN1 ANALOG DIN2 OUTPUT ‐ DIN3 DIN4 DIN5 DIN6 ...
Page 27
Software Setup 1. Initialize the drive to reset all parameters to the factory default values. Refer to Lab # 1 for initialization sequence if needed. If continuing from Lab # 1, you may go directly to step # 5. 2. Exit the Smart Start wizard by pressing Status and then OK. 3. Press the Off button on LCP to prevent unintended operation during setup. 4. Change P 0‐03 to [1] North America. Ignore the Alarm 60 for now. 5. Go to the Q2 Quick Setup menu. Enter the following data: Parameter Description Field Demo Motors Training Lab Motors P 0‐01 Language English English P 1‐21 Motor Power HP 0.33 Hp 0.75 Hp P 1‐22 Motor Voltage 230 V 230 V P 1‐23 Motor Frequency 60 Hz 60 Hz P 1‐24 Motor Current ...
Page 28
Verifying Operation 1. Verify that P 3‐15 is set up as [1] Analog Input 53 for the default reference source. 2. Scale Analog Input 53 to the following values. This is achieved using P 6‐10 thru P 6‐15. Parameter Value Description P 6‐10 0.07 V Terminal 53 Low Voltage P 6‐11 10.00 V Terminal 53 High Voltage P 6‐14 0 Hz Terminal 53 Low Ref./Feedb. Value P 6‐15 60 Hz Terminal 53 High Ref./Feedb. Value Note: These are default settings after changing P 0‐03 to [1] North America 3. Press the Status button, then press the Auto On button. 4. With all switches off, the display status words read Auto Remote Coast. 5. Refer to the following diagram for the currently programmed functions of the Digital Input switches. Start No Coast Operation ...
Page 29
VLT HVAC Drive Lab # 3 HVAC Closed Loop Fan Application Introduction In this lab you will simulate a Closed Loop HVAC application using the VLT HVAC drive. Closed loop operation requires a small amount more programming and wiring. When a VFD is operating in closed loop operation, it modulates the output in order to maintain a set‐point. The set‐point is entered directly into the drive, and the feedback will come from a 2‐10 Vdc pressure transducer. The drive will receive the start/stop signal by means of a BMS system. A relay output will indicate when it is running at set‐point pressure (1.5 in WG). A normally closed over‐pressure switch is also wired back to the drive that will shut it down in the event of a failure. For this lab, you will use the switch box to simulate the BMS signals. Behavioural Objectives Understand the principal of closed loop control Learn to wire a pressure transducer to the VLT HVAC Drive Program the necessary drive parameters for closed loop control of an air handler Gain an understanding of closed loop P.I.D. settings ...
Page 30
Mechanical Setup 1. Connect the motor to the drive. 2. Connect the I/O Test Box to the control card & relays. Ensure all DIN switches are turned OFF. 3. Plug in the demo drive’s power cord into a 120 Vac outlet. Note: The I/O Test Box will simulate the BMS signals. Switches DIN1/18 through DIN6/33 will be used to apply +24 Vdc to the drive’s digital inputs for activation. For the VLT HVAC drive to run in a closed loop configuration, it must have a pressure transducer wired directly to it. This lab is only a simulation of an HVAC application, so there will be no actual pressure. In order to simulate the pressure feedback, a 2‐10 Vdc signal will be input to the drive by means of a potentiometer on the control box. Software Setup 1. Initialize the drive to reset all parameters to the factory default values. Refer to Lab # 1 for initialization sequence if needed. If continuing from Lab # 2, you may go directly to step # 5. 2. Exit the Smart Start wizard by pressing Status and then OK. What alarm did initializing the drive cause? 3. Press the Off button on the LCP to prevent unintended operation during setup. 4. Change P 0‐03 to [1] North America. Ignore the Alarm 60 for now. 5. Go to the Q2 Quick Setup menu. Enter the following data: Parameter Description Field Demo Motors ...
Page 31
6. Press the Hand On button. You will notice that the drive still won’t run because it is being commanded to coast via Digital Input 27. This is shown on the status line at the bottom of the LCP. 7. Turn ON switch DIN3/27 on the control box, which will apply +24 Vdc to Digital Input 27. When the switch is closed, the coast command will go away. 8. Press the Hand On button to start the AMA function, and wait until the process has finished. 9. After the AMA is complete, press the OK key. 10. Verify the parameters shown below are set to the values listed. These are default values. Parameter Value Description P 5‐10 [8] Start Terminal 18 Digital Input P 20‐00 [2] Analog Input 54 Feedback 1 Source 11. Enter the data shown below to set up a Closed Loop program. Parameter Value Description P 1‐00 [3] Closed Loop Configuration Mode P 20‐12 ...
Page 32
Note: The Live Zero function works as follows: If the analog signal on Analog Input 53 or 54 falls below 50% of the minimum scaling of that input (P 6‐10 or P 6‐20), the drive will start to count down from the time set in P 6‐00. If the condition still exists after the timer expires, the function set in P 6‐01 will be executed. These parameters are there to protect you from losing an analog reference/feedback signal and running out of control. P 6‐00 & P 6‐01 apply to both Analog Inputs, but you can enable or disable the function for either input individually using P 6‐17 & P 6‐27. 14. Enter the data shown below for PID functions. Parameter Value Description P 20‐21 1.500 in WG Setpoint 1; Desired system set‐point to maintain P 20‐93 2.00 PID Proportional Gain; A higher gain is more aggressive P 20‐94 10.00 s PID Integral Time; A higher number softens response P 20‐81 [0] Normal PID Normal/Inverse Control P 20‐83 15.0 Hz PID Start Speed P 20‐84 2% On Reference Bandwidth Note: For P 20‐81, choosing Normal allows the drive to build pressure UP to meet the set‐ point. Choose Inverse on a cooling tower to make the drive bring temperature DOWN to meet the set‐point. For P 20‐84, the On Reference Bandwidth means that the feedback signal is within 2% of the maximum feedback from the set point. 2% of 5 in WG = 0.1”. On Reference means feedback is between 1.4” and 1.6” in WG. Why does it make sense to set P 20‐83 to at least the same value as P 4‐12? ...
Page 33
Verifying Operation 1. Press the Auto On button on the LCP. 2. Turn ON switch DIN3/27 on the control box to release the Coast command. 3. With the remaining switches off, the display status reads Auto Remote Standby. 4. Start the drive by turning ON switch DIN1/18 and modulate the feedback on Analog Input 54 above and below the set‐point. The drive should respond to the change in feedback. When the feedback falls below the set‐point, the drive should speed up to compensate. When the feedback goes above the set‐point, the drive should slow down. When the feedback and set‐point match, the drive runs at a constant speed. Notice that when the feedback is above the set‐point, the drive will only slow to 15Hz. This is because the minimum speed is set to 15Hz in P 4‐12. 5. The Red LED on the switch box should light up when the drive is within 2% (+/‐ 0.1 in WG) of set point. 6. Change P 20‐81 to [1] Inverse. Does the drive now speed up when feedback is higher than the set point? Setup Enhancement The function below is intended for applications where pressure can hold, like pumping applications and may not be applicable to fan applications. You noticed earlier that the drive would not slow down below 15Hz when running. The only reason it slows to the programmed minimum speed is because the feedback is above the set‐ point. Imagine that this were a pumping application. A good example of where this might happen is at an apartment building. During nighttime when all the water faucets are turned off, the pressure would begin to climb, and the drive would slow down in order to stop creating excessive pressure. It would not be desirable for the drive to continue to run at 15Hz all night long. Enter the ...
Electronically Controlled Bypass (ECB) Operation ECB Control Card Terminal Connections ECB Control Card 4 3 2 1 ...
Page 38
ECB Control Card Terminal Functions Conn. Term. Function Type 1, 2 N.O. contacts for running in bypass or drive Relay output for user 3‐12 Factory use only 1 Digital input for safety stop User supplied dry contact 2 Common User supplied dry contact 3 Factory use only 4 No function 5, 6, 7 Factory use only X57 8 Digital input for remote bypass enable User supplied dry contact Digital input overrides system to Bypass Mode ignoring all 9 other inputs and commands, except for safety stop on User supplied dry contact terminal 1. 10 Digital input for remote overload reset User supplied dry contact 1, 2 Common for binary I/O 3, 4 No function X59 5 Digital output indicates panel is in Drive Mode. ...
Page 44
Website: www.danfossdrives.com Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary in specifications already agreed. All trademarks in this material are property of the respective companies.
Need help?
Do you have a question about the VLT HVAC Drive and is the answer not in the manual?
Questions and answers