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Proportional Directional Control Valve PRM7
User Manual
Content
Obsah
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3.4. Configuration E04S01 - (proportional directional control valve with internal spool position feedback and external feedback
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Subject to change · PRM 7_MANUAL_5175_1en_03/2016
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Summary of Contents for Argo-Hytos PRM7
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Page 1: Table Of Contents
Proportional Directional Control Valve PRM7 User Manual Content Obsah 1. General technical parameters ..........................2 ................................. 2 1.1. Introduction ................................ 2 1.2. Valves Usage ..............................2 1.3. Limited Warranty ............................... 2 1.4. Used Symbols ................................2 1.5. Caution ..........................3 1.6. -
Page 2: General Technical Parameters
1. General technical parameters 1.1. Introduction The proportional directional control valve PRM7 consists of a cast iron body, a special cylindrical spool, two centering springs with supporting washers, one or two proportional solenoids, a position sensor, eventually a box with digital electronics. The position sensor measuring system consists of a differential transformer with a core and the evaluation electronics in the hybrid design. -
Page 3: Service, Maintenance, Repairs
2. Technical Description 2.1. Basic Parts Figure 1 shows the proportional directional control valve PRM7 and its basic parts. The directional control valve consists of: › the body with the inserted spool (1) ›... -
Page 4: Design Of Valves
3.1. Configuration E01 (directly operated proportional directional control valve) Figure 1 shows the proportional directional control valve PRM7 and its basic parts. The proportional directional control valve in the configuration E01 (direct operation), see Figure 2, can be used, according to the spool type used, for the oil direction and flow rate control (position or speed control). -
Page 5: Valve Assembly
Spool Position Feedback Solenoid Power Supply Figure 6. Proportional directional control valve PRM7 electronics box 5.1. Connection of Power Supply and Command Signal to the Valve Electronics The connection of the power supply and the command signal to the valve electronics will be made by means of a seven-poles connector M23 shown in Figure 7. -
Page 6: Connection Of The External Feedback Cable
The producer does not exclude a possibility of a continuous firmware update with the view of the directional control valves PRM7 functional properties optimization. The valve electronics is connected to the PC with the help of serial interface RS232. Two lines are used for the connection from this interface; RxD enabling the data acceptance from the electronics and TxD enabling data entry to the electronics. -
Page 7: Configuration Program Prm7Conf
7. Configuration Program PRM7Conf 7.1. Basic Description The program PRM7Conf is designed only for the proportional directional control valves PRM7 digital electronics operational parameters modification. Its basic features are: › Minimum requirements for hardware are: Processor: Pentium 433 MHz, Memory RAM: 32 MB, Free HD space: 20 MB, Minimal screen resolution: 800x600 dpi, Operating system: Windows 98, ME, 2000, XP. -
Page 8: Main Menu
7.3.1. Main Menu The main menu is located right in the top of the graphical user interface. Its detail is shown in Figure 16. The often-used items are placed in the toolbar. Figure 16. Main menu of the program PRM7Conf File This menu enables to work mainly with configuration files (*.PRM files). -
Page 9: Status Line
Print This button enables to print the table of the set parameters out which occur in the chosen configuration. This function of the button is the same as the function of the menu item File->Print. Copy This button enables to copy a chosen text from a table cell selected for edit. This function of the button is the same as the function of the menu item Edit->Copy Paste... -
Page 10: Communication With The Valve Electronics
7.4. Communication with the Valve Electronics 7.4.1. Communication Setting The program PRM7Conf communicates with the valve electronics via the computer RS232 serial interface. The basic baud parameters are: › Baud rate 19200 bps › 8 data bits › No parity ›... -
Page 11: Uploading Data From The Valve Electronics
7.4.3. Uploading Data from the Valve Electronics Uploading data from the valve electronics to the program PRM7Conf is possible to be realized › by menu item Valve->Upload data › or by toolbar button Upload data from valve The program also enables to upload data from the valve electronics automatically at the start of the program. This function is activated in case the mode at start is set to on-line (automatic connection after the start up). -
Page 12: Block Diagram
7.5.2. Block Diagram Each configuration is represented by a block diagram in which specific blocks correspond to particular functions (parameters) of the electronics. After a click of the left mouse button on the selected block, a dialog box appears which enables to make required changes. An example of the block diagram of one of the possible configurations is shown in Figure 23. -
Page 13: Setting From A Prepared Configuration File
7.5.4. Setting from a Prepared Configuration File Configuration files (*.PRM files) are used for storing the valve electronics settings. The stored files can be used later for easy setting of other directional control valve electronics or for re-writing incorrect data back to the initial setting. The configuration file with the required setting of the valve electronics can be loaded to the program PRM7Conf ›... -
Page 14: Configuration E02S01
This parameter sets the time within the signal behind the ramp function increase Ramp up – coil B from 0% to 100% at 100% step increase of the entering signal. The current to the coil B is directly proportional to the signal increase behind this ramp. This parameter sets the time within the signal behind the ramp function decrease Ramp down –... - Page 15 This parameter defines the threshold of the command signal below which the command Threshold signal is ignored. Its main purpose is to suppress a signal noise around command signal zero. This parameter sets the time within the signal behind the ramp function increase Ramp up –...
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Page 16: Configuration E03
7.6.3. Configuration E03 Configuration E03 (proportional directional control valve with external feedback) is available in 3 modifications. Solenoid coils located on side A and B of the valve, solenoid coil located on side A only, solenoid coil on side B only. The valve block diagram with solenoid coils on side A and B is shown in Figure 30. -
Page 17: Configuration E04S01
External feedback signal offset This parameter sets the external feedback signal offset. External feedback signal gain This parameter sets the external feedback signal gain. This parameter activates the external feedback linearization. The linearization function is Activation of external feedback used for definition of the required functional relation between its input and output linearization of the external signal feedback. - Page 18 This parameter sets the amplitude range of the coil excitation current superposed on its DC Dither amplitude component. This has a significant influence on hysteresis and sensitivity of the proportional valve. The setting is done experimentally. This parameter sets the frequency range of the coil excitation current superposed on its DC Dither frequency component.
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Page 19: Basic Configuration Blocks Detailed Description
7.7. Basic Configuration Blocks Detailed Description In this part the basic blocks, which the individual block diagrams enabling the valve electronics setting consist of, are described. Each block matches the equivalent item in the parameters table. 7.7.1. Directional Valve Configuration Block symbol: Description: It appears in all configurations. -
Page 20: Threshold
7.7.4. Threshold Block symbol: Description: It appears in all configurations. The threshold sets the valve non-sensitivity around the command signal zero value. The threshold extent is expressed in percents of one polarity command signal maximum. After the setting, the valve does not react to command signal changes which are less than the set threshold limit. For command signal values higher than the set threshold limit, the signal correspondent to input is output. -
Page 21: Dead Band Compensation
7.7.7. Dead Band Compensation Block symbol: Dead band compensation - coil A and B Description: It appears in configurations E01 and E02S01. Dead band compensation - coil A, respectively Dead band compensation - coil B enables to compensate the proportional directional control valve spool positive overlap. -
Page 22: Internal And External Feedback Controllers
7.7.10. Internal and External Feedback Controllers Block symbol: I parameter D parameter P parameter of internal and external of internal and external of internal and external feedback controller feedback controller feedback controller Description: The blocks are used for definition of parameters of PID controllers. There are two control circuits built in the control electronics. Controllers are in configurations E02S01, E03, E04S01. -
Page 23: External Feedback Signal Offset
7.7.13. External Feedback Signal Offset Block symbol: External feedback signal offset Description: It appears in configurations E03 and E04S01. It sets the external feedback signal offset which is performed in percentage of the external feedback sensor signal range. Example: The external feedback signal type is voltage, with 0…10V level. The signal coming out of the external feedback sensor is 2V. The signal offset is set to (-20%). On the external feedback signal offset block outlet, there will be the 0% output signal for this value of a feedback signal. -
Page 24: Linearization Function
7.7.15. Linearization Function Blocks symbols: Internal and External feedback External feedback signal signal linearization-activation linearization - definition Description: It appears in configurations E02S01, E03 and E04S01. Linearization activation of internal or external feedback causes that the signal from the position sensor, eventually external sensor is processed with a help of linearization functions.
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