Control Electronics & Vehicle Diagnostics MICAS-S2
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Questions and Answers

What is the primary role of the diagnostic computer within the system?

  • To interfere with hardware operations
  • To process incoming diagnostic messages (correct)
  • To manage process control functions
  • To control vehicle safety functions directly
  • Which type of connectors are predominantly used for process signals?

  • RJ45
  • DB9, DB15, and DB25 (correct)
  • USB
  • Honeywell connectors
  • Why are subracks integrated into shielded cases?

  • To protect against electromagnetic interferences (correct)
  • To reduce physical space requirements
  • To improve aesthetic design
  • To enhance connectivity options
  • Which function does the Action Diagnostic Language (ADL) serve in the system?

    <p>It enables programming of system responses to messages (C)</p> Signup and view all the answers

    What is a key feature of devices like the Compact Unit alphanumeric display regarding their design?

    <p>They cannot be mounted into subracks (B)</p> Signup and view all the answers

    In the context of the WAP5/WAG9 locomotive, what type of software and hardware integration is involved?

    <p>MICAS-S2 based software and conventional hardware (B)</p> Signup and view all the answers

    What is one consequence of the diagnostic computer's operations concerning safety functions?

    <p>It allows operation without the diagnostic computer (B)</p> Signup and view all the answers

    What happens when the emergency stop push button is activated?

    <p>Pan is lowered regardless of driver command (B)</p> Signup and view all the answers

    Under what condition will the pan not be lowered automatically?

    <p>When the catenary voltage is above the upper line voltage (C)</p> Signup and view all the answers

    What occurs if the pan's air pressure is not adequate after 20 seconds?

    <p>A fault message is displayed (C)</p> Signup and view all the answers

    What action does the MCE perform when instructed to raise the pan if the air pressure is insufficient?

    <p>Disables the raising action (A)</p> Signup and view all the answers

    What is indicated by a priority 1 fault message during pan operation?

    <p>The pan has insufficient pressure (C)</p> Signup and view all the answers

    What happens when the key switch is positioned in Pos.'O'?

    <p>De-energization of the auxiliary contactor occurs (C)</p> Signup and view all the answers

    If HBB2 is isolated, what is the consequence for pan 1?

    <p>Pan 1 is not available for operation (C)</p> Signup and view all the answers

    What does the pressure switch monitor in the context of pan operation?

    <p>The air pressure of the pan (B)</p> Signup and view all the answers

    What should a driver expect if there is low pressure detected after the pan is raised?

    <p>The VCB will open after a delay (D)</p> Signup and view all the answers

    What is the highest priority condition for a pan to be lowered?

    <p>Pan down condition (A)</p> Signup and view all the answers

    In simulation mode, what happens to the physical pan?

    <p>It is not raised physically. (B)</p> Signup and view all the answers

    What happens when both 'Pan selection' switches are in the 'AUTO' position?

    <p>Pan selection depends on the PanSelecMM parameter. (D)</p> Signup and view all the answers

    What is the function of the Trainbus logic (Mside2Con)?

    <p>To detect the side the loco is coupled. (D)</p> Signup and view all the answers

    What does the parameter PA31_P3102-PanSelecMM with value 1 indicate?

    <p>The most distant pans are raised. (D)</p> Signup and view all the answers

    In the trailing mode, what controls the 'Pan disable' contactor on the master loco?

    <p>The slave loco. (A)</p> Signup and view all the answers

    Which pans will be raised if the parameter is set to 2 in the multiple control settings?

    <p>Pans B and D. (A)</p> Signup and view all the answers

    What is the function of the pan control and supervision in FG 31?

    <p>To raise or lower the selected pan. (D)</p> Signup and view all the answers

    What action is performed in the multiple operation mode when the 'Pan selection' switches are in AUTO?

    <p>Pan selection is controlled by the slave loco. (A)</p> Signup and view all the answers

    Which mode allows for the simulation of catenary voltage without physically raising the pan?

    <p>Simulation mode. (B)</p> Signup and view all the answers

    What is the function of the 31-LpanUpWish output signal?

    <p>Represents the driver's wish to raise the pan (D)</p> Signup and view all the answers

    Which signal is responsible for indicating that pan 1 has insufficient pressure?

    <p>3103-Mpan1NoPres (D)</p> Signup and view all the answers

    What condition must be met for the systems to be valid based on the content provided?

    <p>The master loco must be in trailing mode (C)</p> Signup and view all the answers

    What does the 31-BpanDisable signal accomplish?

    <p>Releases or disables the pan self-hold logic (B)</p> Signup and view all the answers

    Which signal indicates a command to raise pan 1?

    <p>3104-BEPPan1 (C)</p> Signup and view all the answers

    What happens if one pan is raised while both pressure switches are open for longer than 2 seconds?

    <p>A priority 1 fault message will be displayed. (A)</p> Signup and view all the answers

    What must the driver do if HBB2 fails during operation?

    <p>Press the 'Fault acknowledge' button. (D)</p> Signup and view all the answers

    In the event of a shutdown on the master locomotive, what will happen to the driver's wish to raise the pan?

    <p>It will be reset. (C)</p> Signup and view all the answers

    If the STB2 fails while the driver is operating from cab 1, which pan should be raised?

    <p>Pan 1 should be raised by HBB2. (B)</p> Signup and view all the answers

    What occurs after a protective shutdown occurs on the slave locomotive?

    <p>The selected pan will lower on the slave loco and reset the wish on the master loco. (C)</p> Signup and view all the answers

    What must be done to release the pan wish self hold logic in HBB2?

    <p>FG31 must release it. (A)</p> Signup and view all the answers

    After a fault has been handled, what is necessary for the selected pan to be raised?

    <p>The driver must issue a new pan up wish command. (A)</p> Signup and view all the answers

    When fault handling occurs on the slave loco during multiple operation, what happens to the master's pan?

    <p>The master's pan will remain raised. (A)</p> Signup and view all the answers

    If a driver's wish to raise a pan has been reset, what must be done to raise it again?

    <p>The driver must reselect the pan manually. (B)</p> Signup and view all the answers

    What is required to manually select pan 2 if HBB2 has failed?

    <p>The driver must press a specific button from cab 1. (A)</p> Signup and view all the answers

    Which condition must be satisfied for the pan to lower automatically under normal operation?

    <p>A priority 1 fault must not be present. (C)</p> Signup and view all the answers

    What occurs if the pressure switch detects low pressure after the pan is raised?

    <p>A warning signal is sent to the driver. (A)</p> Signup and view all the answers

    In the multiple control setting, which parameter indicates that pan selection should be executed by the master locomotive?

    <p>PA31_P3102-PanSelecMM = 0 (A)</p> Signup and view all the answers

    During disturbance handling when HBB2 fails, what is the consequence for the pan operation?

    <p>The system switches to manual control. (A)</p> Signup and view all the answers

    What action must be taken after handling a fault for the selected pan to be raised again?

    <p>The driver's wish must be reset. (D)</p> Signup and view all the answers

    What is a key function of the MICAS-S2 control system in vehicle operation?

    <p>Handling diagnostic tasks and providing supervision (D)</p> Signup and view all the answers

    Which feature of the MICAS-S2 system enhances its adaptability to changing needs?

    <p>Inherent redundancy of the control system (A)</p> Signup and view all the answers

    What is the significance of the standardized data transfer according to IEC TC9 WG22?

    <p>It facilitates communication between different vehicle systems (C)</p> Signup and view all the answers

    How does the MICAS-S2 control system handle electromagnetic interferences?

    <p>Through extensive protection measures (D)</p> Signup and view all the answers

    Which aspect of the MICAS-S2 system contributes to easy vehicle maintenance?

    <p>High modularity and availability of components (B)</p> Signup and view all the answers

    What advantage does centralized fault processing provide in the MICAS-S2 system?

    <p>Increased fault tolerance and adaptability (A)</p> Signup and view all the answers

    What is the primary purpose of the MICAS vehicle Bus within the system?

    <p>To provide access to all devices for commissioning and maintenance (D)</p> Signup and view all the answers

    What is the primary function of the expert system within the MICAS-S2 diagnosis structure?

    <p>To evaluate and store incoming diagnostic messages. (C)</p> Signup and view all the answers

    Which programming aspect is NOT part of the MICAS-S2 software groups?

    <p>Office applications for vehicle administration. (A)</p> Signup and view all the answers

    What role do special functional blocks in Function Block Language (FUPLA) play within the MICAS-S2 system?

    <p>They generate diagnostic messages based on defined disturbances. (A)</p> Signup and view all the answers

    How does the MICAS-S2 system support maintenance staff during troubleshooting?

    <p>By providing hints related to the maintenance of the device or system. (A)</p> Signup and view all the answers

    What is a key feature of the decentralized diagnostic structure of the MICAS-S2 system?

    <p>Independent processing of diagnostic messages by involved computers. (D)</p> Signup and view all the answers

    What capability is included in the MICAS-S2 software for vehicle commissioning?

    <p>Conducting automatic tests on individual modules and racks. (B)</p> Signup and view all the answers

    During which circumstance is the temporal behavior of process variables logged?

    <p>When necessary for a longer period of time to analyze fluctuations. (D)</p> Signup and view all the answers

    What is a defining characteristic of the fibre cables used in the MICAS Vehicle Bus?

    <p>They utilize ST bayonet connectors for signal transmission. (B)</p> Signup and view all the answers

    What type of software is associated with writing project-specific software in the MICAS-S2 system?

    <p>Planning installation software (Mic Tools). (A)</p> Signup and view all the answers

    What condition must be met for the driver to raise the pantograph from Cab 1?

    <p>The EP valve must receive a feed through specific contacts (A)</p> Signup and view all the answers

    Which position of the rotary selection switch prevents the master control electronics (MCE) from controlling the pantograph selection?

    <p>I (B)</p> Signup and view all the answers

    What does the 'AUTO' position on the rotary switch signify?

    <p>Automatic selection of the inactive cab's pantograph (B)</p> Signup and view all the answers

    What is the reason that raising the pantograph in cooling mode through electronics 412.LJ and 412.QG is not possible?

    <p>The contacts are normally open (D)</p> Signup and view all the answers

    If the rotary pantograph selection switch is set to Pos. I, what will happen when a driver attempts to raise the pantograph from Cab 2?

    <p>The pantograph cannot be raised (B)</p> Signup and view all the answers

    Which component is NOT involved in the feed to the EP valve when raising the pantograph from Cab 1?

    <p>Rotary switch Pos. II (D)</p> Signup and view all the answers

    What signifies the 'safety relay control electronics' status during driving mode?

    <p>The relay is always open (B)</p> Signup and view all the answers

    What happens if a driver selects pantograph Cab 1 while Cab 2 is still active?

    <p>Only Cab 1's pantograph will be raised (C)</p> Signup and view all the answers

    Which of the following components is essential for raising the pantograph from Cab 1?

    <p>The ZPT selector switch (B)</p> Signup and view all the answers

    What happens to the auxiliary contactor pantograph {05A, 130.1} when the driver commands to raise the pan?

    <p>It generates a short pulse that activates the pan raising function. (D)</p> Signup and view all the answers

    In which position of the spring-loaded switch can the pantograph be raised by the driver?

    <p>Pos. 'UP' (B)</p> Signup and view all the answers

    What is the role of the auxiliary compressor during the raising of the pantograph?

    <p>To build up sufficient air pressure. (A)</p> Signup and view all the answers

    What must the driver do to lower the pantograph in any situation?

    <p>Use the spring-loaded switch in Pos. 'DN'. (A)</p> Signup and view all the answers

    What effect does the contactor {130.1} have in driving mode regarding the pantograph?

    <p>It transmits the driver's command to the CEL. (A)</p> Signup and view all the answers

    Which position of the key switch enables the controlling of the EP valves to raise the pantograph?

    <p>Pos. 'D' (D)</p> Signup and view all the answers

    What condition must be fulfilled for the systems to be valid regarding pantograph operation?

    <p>There must be sufficient air pressure available. (D)</p> Signup and view all the answers

    Which of the following is a possible consequence if the pan is not lowered properly?

    <p>Damage to the pantograph mechanism is highly likely. (A)</p> Signup and view all the answers

    What does the command from the driver to lower the pantograph require in terms of switch action?

    <p>A short push to Pos. 'DN'. (A)</p> Signup and view all the answers

    Flashcards

    Workstation Access to MICAS Vehicle Bus

    A personal computer with additional equipment allows access to any device connected to the MICAS Vehicle Bus for checking functionality, troubleshooting, and software updates without hardware interference.

    6U Eurocard Modules

    Modules (in a standard size) for subracks containing processors, input/output boards, bus couplers, and power supplies.

    Subrack Configuration

    Subracks are customized in width based on project needs; they house multiple components, and are often shielded to prevent electromagnetic interference.

    Process Signal Connectors

    Commonly used connectors (DB9, DB15, DB25) that adhere to the DIN standard for connecting process signals to modules.

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    Expert System for Diagnostics

    A system that analyzes incoming messages, uses rules (programmed in Action Diagnostic Language (ADL)), and historical data to give a conclusion or suggestion based on them and results in a message to the driver.

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    Diagnostic Computer Role

    The diagnostic computer only provides diagnostic information and does not control vehicle functions, eliminating redundancy needs for safety-critical systems.

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    MICAS-S2 Software Integration

    The vehicle control scheme (WAP5/WAG9 locomotive) combines MICAS-S2 software with conventional hardware to manage desired control functions.

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    Pantograph Raising Speed

    The pantograph can be raised at any speed, ensuring flexibility in operation.

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    Pantograph Lowering Mechanism

    The system automatically lowers the pantograph in emergency situations by de-energizing the auxiliary contactor, ensuring safety.

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    Pantograph Fault: Catenary Voltage

    The pantograph does not automatically lower if the catenary voltage exceeds the upper limit.

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    Pantograph Pressure Monitoring

    Each pantograph has a pressure switch to monitor its air pressure, ensuring proper operation and safety.

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    Pantograph VCB Interlock

    The VCB (Vacuum Circuit Breaker) is disabled if the pantograph air pressure is not satisfactory. It's re-enabled once pressure is adequate, safeguarding the system.

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    Pantograph Fault: Low Pressure

    If the pantograph's air pressure is low, a priority 1 fault message is displayed and the VCB is opened.

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    Pantograph HBB2 Isolation

    When the HBB2 system is isolated, only pantograph 2 is monitored, ensuring safe operation even with limited functionality.

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    Pantograph Raising Confirmation

    After the driver initiates the pantograph raising, a confirmation message is displayed on the diagnostic panel.

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    Pan Control Priority

    When both pan up and down signals are active, the 'pan down' signal takes precedence and controls the pan.

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    Pan Supervision

    This function monitors the selected pan to ensure it's operating correctly according to pre-defined parameters.

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    Simulation Mode

    In this mode, the pan doesn't move physically but sends a signal to mimic the presence of catenary voltage.

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    What is 'BpanUp'?

    A special signal used to simulate catenary voltage in Simulation Mode.

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    Multiple Control: Master Loco

    The master locomotive generates the pan up/down signals in multiple loco operation.

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    Multiple Control: Slave Loco

    The slave loco receives the pan up/down wishes from the master loco over the Trainbus.

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    Pan Selection Logic

    A system that determines which pans will be raised based on the 'Pan selection' switches and locomotive configuration.

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    PanSelecMM Parameter

    A parameter that controls which pans are raised when both 'Pan selection' switches are in 'AUTO' position.

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    Trailing Mode: Master Loco

    In trailing mode, the master loco only generates pan up/down requests, and other functions are controlled by the slave loco.

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    Pan Disable Contactor

    A contactor on the master loco controlled by the slave loco's FG31, which disables the pan in trailing mode.

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    Pressure Switch Pan 1

    This signal indicates that the pressure switch for pan 1 is activated, which suggests that the pan might be in use or ready to be used.

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    VCB Off Demand

    This bit signal indicates the driver's demand to turn off the vacuum contact breaker (VCB). This action could be necessary for maintenance or in case of a fault.

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    Driver's Wish to Raise Pan

    This signal represents the driver's intention to raise the pan. The system will respond to this request based on different factors, like pressure and available power.

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    Driver's Wish to Lower Pan

    This signal represents the driver's intention to lower the pan. It's a command that the system will process based on various factors.

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    Command to Raise Pan 1

    This signal transmits the command to raise pan 1. This command is triggered from a different system or device.

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    Pan Selection

    The process of choosing which pan to raise, either manually or through the software.

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    Pressure Switch Monitoring

    The system continuously checks if the pressure switches are open or closed to determine if a pan is actually raised.

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    Pan Raise Timeout

    If a pan is raised and both pressure switches stay open for more than 2 seconds, a fault is triggered.

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    HBB2 Failure

    If the HBB2 fails, it will be isolated, the driver needs to change cabs and the pan will be raised from a different control system.

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    STB2 Failure

    If the STB2 fails, the pan can still be raised manually using the HBB2.

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    Multiple Operation Mode

    The system ensures that the selected pan is raised consistently across both the master and slave locomotives, even during faults.

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    Slave Loco Shutdown

    If the slave locomotive shuts down, the pan on the master locomotive will remain raised.

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    Trailing Mode Shutdown

    If the slave locomotive shuts down during trailing mode, the pan will be lowered on the slave, but the master will need a new command to raise the pan again.

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    Pan Wish Reset

    If the slave locomotive shuts down, the driver's wish to raise the pan on the master locomotive is reset.

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    Pan Wish Self-Hold

    The pan wish self-hold logic allows the pan to remain raised even if the command is removed temporarily.

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    MICAS-S2 Control System

    The MICAS-S2 control system manages all vehicle operations, monitoring, and maintenance tasks. Its structure and operation provide significant benefits for both vehicle manufacturers and users.

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    Train Communication Network

    A standardized network (IEC TC9 WG22) that allows data exchange between different vehicles and subsystems within a train.

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    MICAS Vehicle Bus

    A dedicated network within a single vehicle connecting various electronic modules for communication and data exchange.

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    Parallel Buses

    Additional data transfer systems in MICAS-S2, offering flexible options for communication depending on the application.

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    Self-Diagnosis

    MICAS-S2 devices can monitor their own health and report any issues, improving reliability and maintenance.

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    Fault Tolerance

    The ability of the system to continue operating even if certain parts fail, enhancing safety and reliability.

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    User-friendly Software Tools (Mic Tools)

    Simplified tools for configuration and programming of MICAS-S2 installations, making management more efficient.

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    Distributed Control System

    A system where control functions are divided among various components instead of relying on a single centralized unit. This allows for flexibility and redundancy.

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    Diagnostic Messages

    Codes generated by the system to identify malfunctions or errors. They are sent to the diagnostic computer for analysis.

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    Expert System

    A software component that analyzes diagnostic messages, applies predefined rules, and provides conclusions or suggestions to the driver or maintenance staff.

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    FUPLA (Function Block Language)

    A programming language used to define specific functions for diagnostic messages. The programmer can choose which events trigger these messages.

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    Remote Bus

    A network that connects devices located outside the main control system, allowing for data transmission over longer distances.

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    Fibre Cables

    High-speed cables used for data transmission in the remote bus. They offer advantages like high bandwidth and resistance to interference.

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    ST Bayonet Connectors

    Secure and reliable connectors used for fiber cables, ensuring proper connectivity and data transmission.

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    Pantograph Raising in Cooling Mode

    Raising the pantograph in cooling mode is not possible due to the normally open contacts of electronics 412.LJ and 412.QG. These contacts are open in cooling mode and closed in driving mode.

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    Pantograph Raising from Cab 1

    When the driver raises the pantograph from Cab 1, the feed to the EP valve 130/2 is made through a series of components including contact 130.1, safety relay control electronics (open in driving mode and closed in cooling mode), and blocking diode 123/2.

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    Pantograph Raising from Cab 2

    When the driver raises the pantograph from Cab 2, a similar electrical path is established to reach the EP valve 130/1, involving components like contact 130.1, safety relay control electronics, and blocking diode 123/2.

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    Rotary Pantograph Selection Switch

    The switch (129.1) has three positions: 'I' for Cab 1, 'II' for Cab 2, and 'AUTO' for automatic selection. In AUTO mode, the pantograph on the opposite side of the activated cab will be raised.

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    Pantograph Selection in AUTO Mode

    When the pantograph selector switch is in AUTO mode, the MCE (Microprocessor Control Electronics) selects the pantograph, otherwise the rotary switch position determines the selected pantograph.

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    Pantograph Control Circuit Schematic

    A schematic diagram (Fig. 7.3) illustrates the electrical connections and components involved in the pantograph control circuit.

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    Software Specification of Pantograph Control Circuit

    The software specification details the functionalities of the pantograph control circuit, including the behavior of the rotary switch and the selection logic.

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    Pantograph Selection Logic

    The logic determines which pantograph is raised, based on the position of the rotary switch (I, II, AUTO) and the active cab. It also considers the PanSelecMM parameter for automated selection.

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    Multiple Control: Master Loco and Slave Loco

    In multiple locomotive operation, the master loco controls the pantograph while the slave loco receives the commands through the Trainbus. In trailing mode, the master loco only sends pan up/down requests, and other functions are controlled by the slave loco.

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    What is FG 31?

    FG 31 is the design designation for the Pantograph Control system in the IR WAP5/WAG9 locomotive.

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    What is the 'Pan up/down wish generation'?

    This refers to the system's ability to receive and process requests to raise or lower the pantograph from the driver.

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    What is 'Simulation Mode'?

    In this mode, the pantograph doesn't physically move but sends a signal to mimic catenary voltage, allowing testing without actual operation.

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    What is 'Multiple Control'?

    This describes how the pantograph control system operates when there are multiple locomotives in a train, coordinating actions between the locomotives.

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    What is the 'Pan Selection Logic'?

    The system determines which pantograph will be raised based on the driver's selection and the configuration of the train.

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    Pantograph Control Modes

    The pantograph can be controlled by either the driver (using the switch) or the system (in cooling mode) to raise and lower the pan.

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    Pantograph Raising Logic

    When the driver wants to raise the pantograph, they push the switch to the 'UP' position. This energizes a contactor which in turn transmits the command to the control system.

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    What are the two stages of pantograph raising?

    First, the auxiliary compressor provides the necessary air pressure to lift the pantograph. Second, the contactor raises the pantograph above the unoccupied cab.

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    Pantograph Emergency Lowering

    The driver can lower the pantograph at any time, preventing damage to the locomotive.

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    Pantograph Cooling Mode

    In cooling mode, the system automatically raises the pantograph above the unoccupied cab to cool the locomotive.

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    What is the function of the auxiliary contactor for the pantograph?

    The auxiliary contactor relays the driver's command to the control system in driving mode, but directly raises the pantograph in cooling mode.

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    What is the role of the auxiliary compressor in pantograph raising?

    The auxiliary compressor is responsible for building up enough air pressure to lift the heavy pantograph.

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    What are the different functions of the pantograph contactor in driving and cooling modes?

    In driving mode, the contactor transmits the driver's command to the CEL. In cooling mode, the contactor directly raises the pantograph.

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    How does the pantograph lowering process work?

    The driver can lower the pantograph by pushing the switch to the 'DOWN' position. This triggers the pantograph to lower, ensuring safety.

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    What are the different positions of the pantograph switch?

    The switch has three positions: 'UP' to raise the pan, 'O' for the neutral position, and 'DN' to lower the pan.

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    Study Notes

    Control Electronics & Vehicle Diagnostic System (MICAS-S2)

    • MICAS-S2 (Micro Computer Automation System Series 2) is a distributed control system used in electric traction vehicles like locomotives, multiple-unit trains, tramways, and trolley buses.
    • It's optimized for electric traction vehicles, handling signal input/output, signal processing, and communication between control units.
    • The system provides a man-machine interface for operation, planning, commissioning, and maintenance.
    • MICAS-S2 has three hierarchical levels: train control, vehicle control, and drive control.
    • The train control level manages coordination of multiple traction vehicles and interfaces with brake systems.
    • The vehicle control level handles all vehicle functions, translating driver and higher-level commands into actions (e.g., contactor control, EP valves) and providing feedback on operational status.
    • The drive control level receives target tractive effort from the vehicle control level, controlling power converters to ensure the motors deliver required torque.
    • MICAS-S2 integrates control system tasks, measures and conditions process values, controls all functions, manages drive control, and ensures power supply and data exchange among vehicle subsystems and between vehicles.

    Field of Application

    • Modern transportation systems have high demands on vehicles, requiring adaptability.
    • MICAS-S2's modular design allows adaptation to diverse vehicle requirements.

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    Description

    This quiz focuses on the MICAS-S2 system, a comprehensive distributed control system for electric traction vehicles like trains and trams. Explore its hierarchical levels: train control, vehicle control, and drive control, along with its operation and maintenance aspects. Test your understanding of the system's functionalities and interfaces.

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