- How to study a mimic panel?
- Types of mimic panels
- Components of Mimic Control Panels and Cubicles
- Application of Mimic Panels
- Mimic Panel vs DCS and SCADA Display
- Mimic Panels and Bus
- Mimic Panels in Fire & Gas Applications
- Additional features in Mimic panel
- Mimic Panel Design Considerations
- Common Mimic Panel Problems and Troubleshooting
- Frequently Asked Questions About Mimic Panels
A mimic panel shall be provided integral to the Fire & Alarm Control Panel (FACP) for continuous monitoring of the Fire & Alarm System (FAS). The mimic shall contain a simplified layout of the buildings, which are to be monitored.
The indications on the mimic panel shall be driven through hard wired signals from the FAS. The detector types are indicated by means of
The installation of the LEDs are such that they protrude at least 3 mm above the surface of the panel so that an alarm can be easily recognized from different perspectives.
A typical example for Mimic panel is shown below
How to study a mimic panel?
The
The MIMIC PANELS also uses super bright LEDs with a viewing range of 100 meters to mount equipment on the MIMIC display.
Types of mimic panels
Printed Mimic Panels
Most mimic boards use 10 mil polycarbonate that can be reverse printed with symbols in custom colors and sizes to fit all apps.
Engraved Mimic Panels
A mimic bus has been cut out of plastic inventory in the past and screwed onto the board. Weatherproof adhesives can now be used to anchor plastic mimic buses, eliminating the need for mounting holes to be drilled.
Components of Mimic Control Panels and Cubicles
Control panels and cubicles typically include several key components for monitoring and controlling systems effectively:
- Schematic Mimic: A front-facing diagram that represents the system being controlled, providing a visual overview of the process.
- Lamps and Indicators: These display the status and position of various elements within the system, offering real-time insights.
- Switches: Used for controlling and adjusting the status of plant items, enabling manual operations as needed.
- Alarm Annunciators and Fault Recording Equipment: These tools alert operators to system issues and record faults for later analysis, helping maintain operational safety.
- Internal Wiring and Equipment Mounting: The panels have comprehensive internal wiring and equipment installed both on the front and internally to ensure reliable operation and ease of access for maintenance.
This combination of features helps operators manage and control complex systems efficiently and safely?
Application of Mimic Panels
Mimic panels provide a visual representation of any process plant or system on a control panel or desk. This visual layout allows operators to monitor the entire plant from a single location, making it easier to manage complex systems. Additionally, mimic panels often function as a secondary backup, complementing digital systems such as HMIs (Human-Machine Interfaces) or SCADA (Supervisory Control and Data Acquisition) systems. This backup capability ensures that operators can continue to oversee operations effectively, even in the event of digital system failures?.
Mimic Panel vs DCS and SCADA Display
A physical mimic panel and a DCS or SCADA graphic both provide operators with a visual representation of a process, but they are implemented differently.
| Feature | Physical Mimic Panel | DCS or SCADA Display |
| Implementation | Hardware panel | Software display |
| Indication | LEDs, lamps, meters and graphic elements | Digital graphics and dynamic objects |
| Location | Control room or designated operating area | Operator workstation or HMI |
| Modification | Physical modification may be required | Software modification is generally easier |
| Process overview | Provides a fixed visual overview | Can provide detailed and dynamic information |
| Maintenance | Requires hardware maintenance | Requires computer, software and network maintenance |
| Alarm information | Usually limited to configured indications | Can provide detailed alarm information |
| Historical information | Usually limited | Trends and historical data can be available |
Modern DCS and SCADA systems provide detailed graphical process displays, but physical mimic panels can still be useful where operators need an immediate plant wide visual overview or an additional indication layer.
The appropriate solution depends on the process, control system architecture, operator requirements, availability requirements, and project specification.
Mimic Panels and Bus
Mimic panels, or mimic buses, provide direct or schematic representations of systems used across various industries for diverse applications. These panels display a simplified layout of processes or equipment, making it easier to monitor and manage complex operations.
Examples of applications include:
- Electrical switchgear panels: Displaying a series of electrical symbols and specifications to indicate circuit statuses and facilitate troubleshooting.
- Process plants: Offering a layout of the plant to quickly identify faults or breakdowns, enhancing response times.
- Security and gatehouses: In business or residential complexes, mimic panels help pinpoint the location of activated alarms, aiding in efficient security management.
Mimic panels are widely employed in industries like cement plants, railways, petrochemical facilities, public utilities, foundries, distribution centers, power generation stations, and laboratories
Mimic Panels in Fire & Gas Applications
In fire and gas systems, mimic panels provide a geographical layout of the installation and equipment, enabling rapid visual appraisal of fire and gas hazards. These panels are strategically installed in easily accessible locations, often near building entrances, for quick reference by personnel.
Some mimic panels use a tile matrix construction, allowing for easy modifications by adding or removing tiles as needed?
Additional features in Mimic panel
- Detector failure
- Ground fault detection in the loop
- FAS failure
- Power failure
Mimic Panel Design Considerations
A mimic panel should be designed to provide important process information quickly and clearly rather than attempting to reproduce every detail of the process.
Important design considerations include:
Process Layout
The mimic should represent the actual process flow or equipment arrangement in a logical manner so that operators can understand the process sequence quickly.
Equipment Identification
Important equipment such as pumps, compressors, tanks, valves, breakers, transformers, and other critical items should be clearly identified.
Status Indication
Alarm Indication
Critical alarms should be clearly visible and distinguishable from normal operating indications.
Visibility
Indicators should be positioned and selected so that operators can recognize important conditions from the intended viewing distance.
Maintainability
The panel construction should allow access for LED replacement, wiring inspection, terminal checking, cleaning, and other maintenance activities.
Future Modification
Where practical, the design should allow for future equipment additions or process modifications without requiring complete replacement of the panel.
Signal Reliability
The signal source, wiring, communication interface, power supply, and indication circuitry should be considered carefully because an incorrect indication can lead to an incorrect operator response.
A good mimic panel should prioritize clarity, visibility, reliability, and operator understanding rather than simply displaying a large amount of information.
Common Mimic Panel Problems and Troubleshooting
LED or Lamp Does Not Illuminate
- Check the incoming power supply, fuse or circuit protection, wiring, terminal connections, output signal, and LED or lamp itself.
- If the control system output is healthy but the indication is not working, check the wiring and panel indication circuit.
Incorrect Equipment Status
- If the mimic panel shows a pump as running when it is actually stopped, verify the source feedback signal.
- Check the PLC or DCS input, field feedback contact, interposing relay, terminal connections, and signal mapping.
Valve Status Does Not Match Actual Valve Position
- Check the open and closed limit switches, feedback wiring, PLC or DCS input status, and signal mapping.
- Also verify whether the indication represents the commanded position or the actual valve position.
- These two conditions should not be confused.
Entire Mimic Panel Is Not Working
- Check the panel power supply, circuit protection, common wiring, communication interface, and system output.
- If multiple indications fail simultaneously, investigate the common power supply or interface rather than troubleshooting each LED individually.
False Alarm Indication
- Verify the field detector or alarm signal first. Then check the PLC, DCS, Fire and Gas system, signal interface, wiring, and mimic indication circuit.
- Alarm troubleshooting should follow the approved cause and effect and system architecture.
Communication Failure
The troubleshooting approach should identify whether the problem originates in the field signal, controller, communication interface, or mimic panel itself.
For PLC or network based mimic panels, check the communication link, interface modules, network status, PLC or DCS communication diagnostics, and power supply.
Frequently Asked Questions About Mimic Panels
What is the main purpose of a mimic panel?
The main purpose of a mimic panel is to provide a simplified visual representation of a process, electrical system, or plant area so that operators can quickly understand equipment status and important process conditions.
What is a mimic panel in a control room?
A control room mimic panel is a visual display that represents important plant equipment, process flow, electrical systems, or safety system conditions. It may use LEDs, lamps, switches, meters, annunciators, and graphic elements.
What is the difference between a mimic panel and SCADA?
A mimic panel is commonly a physical display, while SCADA is a computerized supervisory system that provides process monitoring, control, alarms, trends, and data acquisition.
Is a mimic panel connected to a PLC?
Yes. A mimic panel can receive equipment status and other indications from a PLC. Depending on the design, signals may be hardwired or transferred through an appropriate interface or communication system.
Can a mimic panel be connected to a DCS?
Yes. A mimic panel can be integrated with a DCS to display selected process and equipment status. The interface architecture depends on the project design and system requirements.
What are the main components of a mimic panel?
Where are mimic panels used?
Mimic panels are used in process plants, power plants, substations, Fire and Gas systems, water treatment facilities, utility systems, transportation systems, and other industrial control applications.
Why are mimic panels still used when DCS and SCADA are available?
What should be checked during mimic panel commissioning?
Commissioning should verify power supply, wiring, signal mapping, LED or lamp operation, equipment status indication, alarm indication, switch operation where applicable, communication interfaces, and agreement between the actual field condition and the displayed condition.
What causes incorrect indication on a mimic panel?
Incorrect indication can be caused by faulty field feedback, incorrect PLC or DCS logic, incorrect I/O mapping, wiring errors, faulty relays, communication problems, defective LEDs, or incorrect configuration.
What is a mimic panel in a substation?
In substations, mimic panels serve as control interfaces that depict the layout of the electrical network, including breakers, transformers, and switches. This visual setup helps operators manage power distribution by providing an at-a-glance view of the system’s status and enabling quick responses to faults or system changes. The panels can include LEDs and indicators for equipment status, often connected to a PLC or SCADA system for enhanced control?.
What is a mimic panel diagram?
A mimic panel diagram is a schematic layout printed or displayed on the front of a mimic panel, showing the process flow or system configuration. This diagram includes symbols representing key components like valves, pumps, or electrical switches, often color-coded for clarity. It is typically made from durable materials and can be customized to reflect specific process requirements. The diagram helps operators understand and manage the system at a glance?.
What are mimic displays?
Mimic displays, also known as mimic panels, are control interfaces that visually represent processes, making them easier to monitor and control. These displays can be static or interactive, incorporating elements like LEDs and switches to provide real-time updates on equipment status. Mimic displays are valuable in complex systems, such as those in power plants, where they simplify control and improve operational safety?.
