A versatile control system for many applications is Mark VIe. It offers networked, high-speed I/O for systems with simplex, dual, and triple redundancy. For I/O, controllers, and supervisory interface to operator and maintenance stations, as well as third-party systems, industry-standard Ethernet communications are employed. Mark VIe and associated controls employ ToolboxST* as a standard software platform for programming, configuring I/O, trending, and examining diagnostics. For efficient management of equipment assets, it offers a single source of high-quality, time-coherent data at the controller and plant levels.
What is GE Mark VIe?
A versatile platform for various applications is the Mark VIe distributed control system (DCS). For a simplex, dual, and triple redundant systems, it has high-speed networked I/O capabilities. Additionally, the Mark VIe provides SIL3-capable safety systems under a single standard operator and engineering toolkit.
The system’s brain is a single-board controller. Along with the primary CPU, it also has extra Ethernet drivers for the control network and redundant Ethernet drivers for interacting with networked I/O. For the primary processor and I/O, a real-time, multitasking QNX operating system is utilized. Application software is given and saved in non-volatile memory using a customizable control block language. It complies with the 32-bit floating-point format of IEEE-854. A deterministic, high-speed 100 MB communications network with a fiber interface is offered by the dedicated, full-duplex, point-to-point protocol known as IONet. It enables the communication between networked I/O packs, also known as I/O packs, and the primary processor(s).
The barrier or box-type terminal blocks used to mount each I/O pack are on the board. A power supply, a local processor, a data acquisition board, and two Ethernet ports are all included in the I/O pack. A control system frame rate of 10 ms in a simplex, dual, or triple redundant architecture is possible thanks to the increase in computation power that comes with the addition of I/O packs. Each I/O pack’s local processors run algorithms at higher rates as needed by the application because some process sub-systems need even more performance.
Depending on how crucial a process is, each application has a particular set of redundancy requirements. Mark VIe offers a wide variety of redundancy options that can be provided in almost any combination and deployed locally or remotely. These redundant alternatives include some of the following:
- Energy sources and resources
- Controlling (main processor)
- Redundant I/O network design
- Each terminal board’s I/O packets
- An I/O and Ethernet Ports pack
To digitize the sensor signal, run algorithms, and connect to a separate controller that houses the main processor, one or more I/O packs are installed on each board. I/O packs have a data acquisition board that is specific to the class of input device and a local processor board that runs the QNX operating system. Algorithms are executed by local processors more quickly than by the overall control system.
- Dual 100 MB Ethernet ports
- 100 MB full duplex ports
- Online repair per I/O pack
- Operation -30°C to 65°C (-22 °F to 149 °F)
- Accuracy -30°C to 65°C (-22 °F to 149 °F)
- I/O packs rated Class 1, Div. 2
- Ambient temperature sensor
- LEDs: power status and attention
- LEDs: Ethernet link-connected and communication-active
- LEDs: application-specific
- Processor: 32-bit RISC CPU 266 mHz
- Infrared Transceiver: Low-level diagnostics, monitor I/O,
- set host/function names, error status
- Power: 28 V dc (typical)
- Internal solid-state circuit breaker and soft start
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