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Summary of Contents for Woodward SG 2D
- Page 1 37132B SG 2D Speed Governor Operation Manual Software Version 3.3xx Manual 37132B...
- Page 2 Provides other helpful information that does not fall under the warning or caution categories. Woodward Governor Company reserves the right to update any portion of this publication at any time. Information provided by Wood- ward Governor Company is believed to be correct and reliable. However, Woodward Governor Company assumes no responsibility unless otherwise expressly undertaken.
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Page 3: Table Of Contents
Introduction ............................14 Set Point Value Specification........................14 Speed Measurement..........................14 Control Variable Output ........................15 Actuator Current Restriction .............15 (only SG 2D-T-HO and SG 2D-T-HOV) Actuator Current Short-Cut Protection ........15 (only SG 2D-T-HO and SG 2D-T-HOV) Control Outputs .............................16 Wire Break Monitoring ..........................16 Operation Sequence ..........................17... - Page 4 Engine Parameters ..........................27 System Parameters ..........................29 Output Parameters ..........................30 7. C ....................31 HAPTER OMMISSIONING Configuration and Connection ......................31 Commissioning the SG 2D for the First Time..................32 A. D ....................... 36 PPENDIX IMENSIONS B. T ....................37 PPENDIX ECHNICAL C.
- Page 5 Figures and Tables Figures Figure 3-1: Wiring diagram SG 2D-T-LOV ..........................8 Figure 3-2: Wiring diagram SG 2D-T-HO / HOV ........................9 Figure 3-3: Power supply................................. 10 Figure 3-4: MPU ..................................11 Figure 3-5: MPU - Minimum necessary input voltage depending on frequency ..............11 Figure 3-6: Discrete inputs...............................
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Page 6: Chapter 1. General Information
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ The SG 2D is a universal digital speed governor for combustion engines, which is able to control an actuator via PWM or analog signal. The set point value may be specified with various methods. The actual speed will be measured via an MPU input, which may either be switching or inductive. -
Page 7: Chapter 2. Electrostatic Discharge Awareness
CAUTION To prevent damage to electronic components caused by improper handling, read and observe the pre- cautions in Woodward manual 82715, Guide for Handling and Protection of Electronic Controls, Printed Circuit Boards, and Modules. © Woodward Seite 7/45... -
Page 8: Chapter 3. Connection Of The Unit
[% ] [n o .] [% ]) S E T 9 10 11 12 13 14 15 16 17 18 Subject to technical modifications. 2004-11-11 | SG 2D-T Wiring Diagram sg2dww-4604-ap.skf Figure 3-1: Wiring diagram SG 2D-T-LOV Page 8/45 © Woodward... -
Page 9: Sg 2D-T-Ho / Hov
S G 2 D - T - H O Subject to technical modifications. Subject to technical modifications. 2004-11-11 | SG 2D-T Wiring Diagram sg2dww-4604-ap.skf 2004-11-11 | SG 2D-T Wiring Diagram sg2dww-4604-ap.skf Figure 3-2: Wiring diagram SG 2D-T-HO / HOV © Woodward Seite 9/45... -
Page 10: Power Supply
Operation Manual 37132B SG 2D - Speed Governor WARNING A circuit breaker must be provided near the engine and in a position easily accessible for the operator. This must also bear a sign identifying it as an isolating switch for the engine. -
Page 11: Mpu Input
Operation Manual 37132B SG 2D - Speed Governor MPU Input ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ 24 V Pickup < 1.0 V Figure 3-4: MPU Terminal Description switching/inductive 2.5 mm² 2.5 mm² Table 3-3: MPU Specification of the input circuit for inductive speed sensors Ambient temperature: 25 °C... -
Page 12: Discrete Inputs
20 mA-analog input for set point specification 2.5 mm² 0 mA 2.5 mm² Table 3-6: Analog input - Set point specification Alarm Outputs ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ external device NPN-transistor output Figure 3-8: Transistor outputs - SG 2D-T Description Transistor Collector Emitter N.C. Transistor 1 2.5 mm² Transistor 2 2.5 mm²... -
Page 13: Controller Output
SG 2D-T-HO / SG 2D-T-HOV: Both the SG 2D-T-HO and the SG 2D-T-HOV have an adjustable current re- striction, which permits a continuous current of 7 A and higher for a short time. Actuators with a con- tinuous load less than this value can be operated. -
Page 14: Chapter 4. Functional Description
Introduction ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ The SG 2D is an engine speed governor used to control a fuel feed actuator on an internal combustion engine. The SG 2D can operate both as a standalone frequency controller and as a subordinate controller in conjunction with a superordinate controller, such as a synchronizer or load control. -
Page 15: Control Variable Output
By summarizing the actual actuator current the SG 2D permits an overcurrent for an appointed time. The over- current has to be compensated by a corresponding negative current deviation. If there is a permanent overcurrent the SG 2D will try, after the restriction has tripped, to keep the current on the rated limit value. -
Page 16: Control Outputs
Control Outputs ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ The SG 2D-T speed governors provide 2 transistor outputs, output 1 and output 2. Output 1 is always configured as N.C. output, and output 2 is always configured as N.O. output. However, it is possible to change the output logic in the configuration. -
Page 17: Operation Sequence
Operation Manual 37132B SG 2D - Speed Governor Operation Sequence ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ The start-up sequence of the engine can be divided into four sections according to the speed: Condition Effect The speed is lower than the configured switch-on speed for the No control variable output (STOP operating condition). -
Page 18: Droop
Operation Manual 37132B SG 2D - Speed Governor Droop ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ The controller can be switched to droop behavior; the slope of the droop characteristic curve can be modified by means of the Droop Characteristic parameter. Droop deals with the fact that the set point value at any given time is affected as a function of the actuator setting (which can be equated with the power output). -
Page 19: Procedure For Determining Pid Settings
Operation Manual 37132B SG 2D - Speed Governor Rise time T : Period starting when the value of the controlled variable leaves a predefined tolerance range for rise the control variable following a step in the disturbance variable or reference input variable and ending the first time the value re-enters this range. -
Page 20: Figure 4-4: Step Response - Controller Setting
Operation Manual 37132B SG 2D - Speed Governor 1. Controller operated as a P-only controller = ∞ [screen setting: T (where T =0], T = 0). 2. Increase gain K (P-gain) until the control loop oscillates continuously at K Pcrit... -
Page 21: Leds And Interfaces
If all four digits flash the internal fixed set point can be set in RPM. If no buttons are pressed for 20 seconds the display will return to the speed display. SG 2D-T-HO/SG 2D-T-HOV: If the SG 2D limits the actuator current, the decimal points of the second and third digit of the 7-segment display flash. -
Page 22: Push Buttons
" Interfaces ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ The SG 2D is equipped with a communication interface operating at the following baudrate: Direct configuration 300 Baud (8 Bit, no parity, 1 stop bit) The parameters can be configured using the service interface. A direct configuration cable, one end of which is connected to the PC/laptop and the other end of which is connected to the item, is required to do this. -
Page 23: Chapter 6. Configuration
The following parameter description contains the texts for the direct configuration via the serial RS- 232 service interface. The configuration of the SG 2D is performed using a PC with the software LeoPC1. The most important control- ler parameters may be configured using the push button on the unit. -
Page 24: Version Parameter
Idle set point value 12.50 to 100.00 % value If the SG 2D is operating in Idle mode, the idle speed set point value must be set here as a percentage of the rated speed. NOTE Activating the Idle mode is described in the section Engine Parameters. -
Page 25: Controller Parameters [Dynamics Set 2]
Operation Manual 37132B SG 2D - Speed Governor Controller Parameters [Dynamics Set 2] If the digital input "droop" is set, a second set of parameters will be activated. In the 7-segment display these pa- rameters are displayed and can be changed. With the LeoPC1 software, both sets of parameters can be changed independently of each other. - Page 26 Operation Manual 37132B SG 2D - Speed Governor Minimal speed Minimum speed for enabling the start position 0 to 120.00 % for start-up The actuator will be opened to the start position setting described above when this speed is reached allowing the unit to be started. This speed is set as a percentage of the rated speed.
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Page 27: Engine Parameters
Operation Manual 37132B SG 2D - Speed Governor Engine Parameters ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ Engine related parameters are configured in this group. Rated speed Rated speed at rated frequency 10 to 3,600 min rated frequency Rated speed of the engine in revolutions per minute. This parameter can also be changed via the three buttons and via the 7-segment display. - Page 28 SG 2D ramps immediately back to the rated speed. With switching the discrete input 'Set point lower' before and during engine start, the SG 2D ramps the engine up to Idle speed. With leaving that DI the SG 2D guides the en- gine to rated speed.
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Page 29: System Parameters
Operation Manual 37132B SG 2D - Speed Governor System Parameters ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ Parameters concerning the set point value specification are configured in this group. Source set- Set point value specification intern / digital / analog point The set point value of the control is set by one of three possible choices. -
Page 30: Output Parameters
YES ..Set point value as a 4 to 20 mA signal. NO..Set point value as a 0 to 20 mA signal. Note: The units SG 2D-T-LOV and SG 2D-T-HOV include this parameter, but it should be configured to "NO". Output Parameters ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡... -
Page 31: Chapter 7. Commissioning
For a successful commissioning of the SG 2D please work through this procedure step by step. Configuration and Connection ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ Connect the SG 2D according to the connection diagram. Please take care that you use the connection diagram according to the unit type. A difference is made between: Type... -
Page 32: Commissioning The Sg 2D For The First Time
Even if you are using a master controller that specifies the set point value, it is advisable to start the SG 2D up for the first time with the internal, fixed set point value specification. This prevents the master controller (for ex- ample the GCP) from affecting the control behavior of the SG 2D, which makes it easier to set the parameters for the SG 2D speed governor. - Page 33 Operation Manual 37132B SG 2D - Speed Governor • Crank the engine with the fuel supply off. • Verify that the SG-2 is reading the correct speed. • Verify that the cranking speed of the engine is greater than the Minimum speed for startup. The actuator should open to the Starting state of the actuator setting.
- Page 34 The master controller does not have to be set for an especially fast response, since this unit only pro- vides a set point value specification for the SG 2D and does not directly control the engine speed. Al- ways make sure that the set point value transmission from the master control is slower than the control response of the SG 2D, since oscillations may otherwise be generated between the two controllers.
- Page 35 Operation Manual 37132B SG 2D - Speed Governor Parameters "Engine" Rated speed at rated frequency............. 1,500 RPM Depends on controlled engine Number of cogs (Pickup).............. xxx cogs of the sensor Min. control signal at actuator............0.00 % To utilize the governor’s full dynamics Max.
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Page 36: Appendix A. Dimensions
W × H × D (mm) SG 2D-T-LOV 115 × 126 × 54 113 × 108 × 41 SG 2D-T-HO/HOV 137 × 126 × 56 135 × 108 × 43 Connection 1.5 mm² or 2.5 mm² screw terminals depending on the plug connector... -
Page 37: Appendix B. Technical Data
Ambient variables -------------------------------------------------------------------------------------------- Power supply......................8 to 32 Vdc Power source......................Battery Length of supply line (light plastic-coated cable).. max. 25 m (only SG 2D-T-HO / HOV) Intrinsic consumption............... (with/without RS-232) (without power electronic; all versions)..........max. 1.5 W/1.0 W Ambient temperature..................-20 to 70 °C Ambient humidity ............maximum 95 %, non-condensing... - Page 38 Operation Manual 37132B SG 2D - Speed Governor Analog input ---------------------------------------------------------------------------------------------------- Version SG 2D-T-HO Input ........................0/4 to 20 mA Load..........................250 Ω Resolution........................10 Bit Versions SG 2D-T-LOV, SG 2D-T-HOV Input ................. differential measuring, +/-3 Vdc Input resistance....................approx. 40 kΩ...
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Page 39: Appendix C. Parameter List
Operation Manual 37132B SG 2D - Speed Governor Appendix C. Parameter List Version _________________________________________________________________ Project _________________________________________________________________ Item number ________________________ Date ____________________ Standard % value Customer Parameter Setting range Option setting refers to setting VERSION PARAMETER Software version DYNAMICS PARAMETER Fixed setpoint value 12.50 to 130.00 %... -
Page 40: Appendix D. Service Options
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ If a control (or any part of an electronic control) is to be returned to Woodward for repair, please contact Wood- ward in advance to obtain a Return Authorization Number. When shipping the unit(s), attach a tag with the fol- lowing information: •... -
Page 41: Packing A Control
Stuttgart [+49 (0) 711 789 54-0]. They will help expedite the processing of your order through our distributors or local service facility. To expedite the repair process, contact Woodward in advance to obtain a Return Authoriza- tion Number, and arrange for issue of a purchase order for the unit(s) to be repaired. No work can be started until a purchase order is received. -
Page 42: How To Contact Woodward
+49 (0) 711 789 54-100 eMail: sales-stuttgart@woodward.com For assistance outside Germany, call one of the following international Woodward facilities to obtain the address and phone number of the facility nearest your location where you will be able to get information and service. Facility... -
Page 43: Engineering Services
SG 2D - Speed Governor Engineering Services ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ Woodward Industrial Controls Engineering Services offers the following after-sales support for Woodward prod- ucts. For these services, you can contact us by telephone, by e-mail, or through the Woodward website. • Technical support •... -
Page 44: Technical Assistance
Operation Manual 37132B SG 2D - Speed Governor Technical Assistance ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ If you need to telephone for technical assistance, you will need to provide the following information. Please write it down here before phoning: Contact Your company____________________________________________________ Your name_______________________________________________________ Phone number ____________________________________________________... - Page 45 Phone +49 (0) 711 789 54-0 • Fax +49 (0) 711 789 54-100 sales-stuttgart@woodward.com Homepage http://www.woodward.com/power Woodward has company-owned plants, subsidiaries, and branches, as well as authorized distributors and other authorized service and sales facilities throughout the world. Complete address/phone/fax/e-mail information for all locations is available on our website (www.woodward.com).
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