20+ Novozymes South Asia Interview Questions and Answers

Industrial communication protocols are standards for data exchange between devices in industrial automation and control systems.

• Some common industrial communication protocols include Modbus, Profibus, DeviceNet, Ethernet/IP, and CANopen.

• These protocols enable devices from different manufacturers to communicate with each other and exchange data.

• Industrial communication protocols can be wired or wireless, and can operate at different speeds and frequencies depending on the appl...read more

I have worked on various DCS architectures in my career, including those for chemical plants and power plants.

• Designed and implemented DCS architecture for a chemical plant project

• Developed DCS architecture for a power plant project

• Worked on DCS architecture for a water treatment plant project

• Collaborated with team to create DCS architecture for a pharmaceutical plant project

MODBUS settings include baud rate, parity, data bits, stop bits, and slave address.

• Baud rate determines the speed of communication between devices.

• Parity is used for error checking and can be set to even, odd, or none.

• Data bits determine the number of bits used to represent each character.

• Stop bits indicate the end of a character and can be set to 1 or 2.

• Slave address is used to identify the device on the network.

• Example: 9600 baud rate, even parity, 8 data bits, 1 stop bit, ...read more

The maximum input output handle refers to the maximum number of inputs and outputs that a device can handle.

• The maximum input output handle varies depending on the device and its specifications.

• It is important to consider the maximum input output handle when selecting a device for a project.

• For example, a PLC may have a maximum input output handle of 256 inputs and 256 outputs.

• Another example is a microcontroller with a maximum input output handle of 40 pins.

• Exceeding the max...read more

Factors to consider for lighting calculation include type of space, desired lighting levels, fixture efficiency, and lighting layout.

• Type of space (office, warehouse, retail, etc.)

• Desired lighting levels (measured in lux or foot-candles)

• Fixture efficiency (lumens per watt)

• Lighting layout (spacing and placement of fixtures)

• Natural lighting sources (windows, skylights)

• Color rendering index (CRI) for accurate color representation

• Lighting controls (dimming, sensors)

• Energy efficie...read more

Environment conditions such as temperature, humidity, and cleanliness are crucial for panel installation.

• Temperature should be within specified range to prevent damage to components.

• Humidity levels should be controlled to avoid condensation and corrosion.

• Cleanliness is important to prevent dust and debris from affecting performance.

• Proper ventilation is necessary to prevent overheating.

• Avoid exposure to direct sunlight or extreme weather conditions.

• Consider environmental fact...read more

The lifecycle of a project refers to the stages it goes through from initiation to closure.

• Initiation: project is defined and approved

• Planning: project objectives, scope, and resources are determined

• Execution: project plan is put into action

• Monitoring and Control: project progress is tracked and necessary adjustments are made

• Closure: project is completed and evaluated

• Examples: construction of a building, development of a software application, implementation of a new process

The number of devices that can be added in Modbus depends on the network architecture and the number of available addresses.

• The maximum number of devices that can be added to a Modbus network is 247.

• The number of available addresses depends on the type of Modbus protocol used (RTU or TCP/IP).

• The network architecture also plays a role in determining the number of devices that can be added.

• It is important to ensure that the network does not become overloaded with too many devic...read more

I have worked on multiple SCADA systems including Wonderware, Ignition, and Inductive Automation.

• I have experience with configuring and programming SCADA systems

• I have worked with Wonderware, Ignition, and Inductive Automation

• I am familiar with creating HMI screens, alarms, and trends

• I have experience with PLC communication and data acquisition

• I have worked on projects in various industries including manufacturing and water/wastewater treatment

The number of pages designed in HMI depends on the project requirements and complexity.

• The number of pages can range from a few to hundreds depending on the project scope.

• The complexity of the HMI design and functionality also affects the number of pages.

• Factors such as user interface, data visualization, and system integration can impact the number of pages.

• It is important to prioritize user experience and ease of navigation when designing HMI pages.

Voltage levels as per standards vary depending on the application and region, with common levels including 110V, 220V, and 415V.

• Voltage levels can vary depending on the application and region

• Common residential voltage levels include 110V and 220V

• Industrial voltage levels are typically higher, such as 415V

• International standards like IEC and ANSI provide guidelines for voltage levels

Restricted Earth Fault is a type of fault in electrical systems where the fault current is limited to a specific section of the system.

• Occurs when a fault current flows from a phase conductor to the earth through a restricted path

• Usually detected by a relay that monitors the current imbalance between the phase and neutral conductors

• Helps in quickly identifying and isolating the fault to prevent damage to equipment and ensure safety

• Commonly used in power distribution systems t...read more

Differential earth fault is a type of fault in electrical systems where the current flowing into and out of the system is not equal due to an earth fault.

• Differential earth fault protection is used to detect such faults by comparing the current entering and leaving the system.

• It is important for safety as it helps prevent damage to equipment and potential electric shocks.

• Examples of differential earth fault protection devices include differential relays and ground fault detec...read more

Implement a scheme using temperature sensors to detect transformer temperature.

• Install temperature sensors at key points on the transformer

• Set up a monitoring system to continuously track temperature readings

• Establish temperature thresholds for alerts and shutdowns

• Implement a cooling system to regulate temperature if needed

Molded Case Circuit Breakers (MCCBs) are types of circuit breakers that provide protection against overcurrents.

• Thermal-magnetic MCCB: Trips when a current overload or short circuit is detected.

• Electronic MCCB: Uses electronic components for more precise and adjustable protection.

• Compact MCCB: Smaller in size for limited space installations.

• Adjustable MCCB: Allows for manual adjustment of trip settings.

• Motor protection MCCB: Specifically designed for motor protection applicat...read more

A control valve is a device used to regulate the flow of a fluid in a system by varying the size of the flow passage.

• Control valves are commonly used in industries such as oil and gas, chemical, and power plants.

• They can be operated manually, pneumatically, electrically, or through a combination of these methods.

• The operation of a control valve involves adjusting the position of the valve plug or disc to control the flow rate, pressure, temperature, or level of a fluid.

• Contro...read more

Transformer insulation class indicates the temperature at which the insulation can operate safely.

• Transformer insulation class is denoted by a letter (e.g. A, B, F, H) which corresponds to a maximum allowable temperature rise above ambient.

• Higher insulation classes can withstand higher temperatures, providing better protection for the transformer.

• Common insulation classes include A (105°C), B (130°C), F (155°C), and H (180°C).

Modbus communication types include RTU, ASCII, and TCP/IP.

• RTU (Remote Terminal Unit) is a serial communication protocol that uses binary code to transmit data.

• ASCII (American Standard Code for Information Interchange) is a serial communication protocol that uses ASCII characters to transmit data.

• TCP/IP (Transmission Control Protocol/Internet Protocol) is a network communication protocol that uses Ethernet to transmit data.

• Modbus TCP/IP is the most commonly used type of Modbus...read more

Communication between PLC controllers and DCS involves establishing a reliable connection for data exchange.

• PLC controllers and DCS communicate through various communication protocols such as Modbus, Profibus, Ethernet/IP, etc.

• Data is exchanged between PLC controllers and DCS for process control and monitoring.

• Communication can be bidirectional, allowing both systems to send and receive data.

• Proper configuration and programming of communication modules are essential for seaml...read more

The maximum speed in Modbus depends on the baud rate and cable length.

• Modbus speed is measured in baud rate

• Higher baud rates allow for faster data transfer

• Cable length can also affect the maximum speed

• For example, at 9600 baud rate, the maximum cable length is 1200 meters

The cable length for PA cables varies depending on the specific application, while the diameter is typically determined by the current carrying capacity and voltage requirements.

• Cable length for PA cables can range from a few meters to several hundred meters, depending on the distance between the PA system and the speakers.

• The diameter of PA cables is usually determined by the current carrying capacity and voltage requirements of the system. Thicker cables are needed for high...read more

Troubleshooting Profibus involves checking physical connections, network configuration, and device settings.

• Check physical connections to ensure cables are properly connected and not damaged.

• Verify network configuration settings such as baud rate, parity, and address assignments.

• Inspect device settings to ensure they match the network configuration and are functioning correctly.

• Use diagnostic tools like Profibus analyzers to identify communication issues.

• Check for any error m...read more

Profibus is a widely used fieldbus communication protocol in industrial automation.

• Profibus stands for Process Field Bus.

• It is used for communication between field devices and control systems in industrial automation.

• There are two main types of Profibus: Profibus DP (Decentralized Peripherals) and Profibus PA (Process Automation).

• Profibus uses a master-slave communication model.

• It is known for its high-speed data transmission and reliability in industrial environments.