Ovation Controller Model OCR1100 Emerson

Operator Interface Processing

The Ovation controller performs all limit and alarm processing based on the database configuration for each point.   However, Ovation HMI’s provide the capability to suspend these functions, as necessary, based on the process state or operator actions.  

Controller Types

Ovation controller capabilities can be expanded with add-on software licenses for simulation, virtual control or advanced control. The simulator controller is a standard controller that uses simulated I/O (instead of the actual hardware I/O system) to interface control schemes with a process model or simulation. The simulator controller can be used in a basic factory acceptance test process model or with high-fidelity process plant models. An advanced controller executes licensed algorithms with advanced functionality such as auto regressive, dynamic matrix, device, sootblowing, fuzzy logic, sequencing, programmable block and temperature profile.   The virtual controller is a software-licensed capability which recreates the Ovation hardware controller with a real-time operating system on a Windows-based platform. It is used primarily in Ovation simulation solutions with non-redundant virtual controllers to decrease the hardware footprint. The virtual controller has most of the interface attributes of a standard, simulation or advanced controller except for hardware I/O support.  

Redundancy

The OCR1100 controller is designed to accommodate multiple levels of redundancy for key components, including:  Ovation network interface  Functional processor, memory, and network controller  Processor power supply  I/O interfaces  Input power feed  I/O power supply  Auxiliary power supply  Remote I/O communications media The standard hardware configuration for controller redundancy is a passive backplane base on which both a primary and a backup controller are installed.

Redundant 24V power is connected to the unit which is individually distributed to the controllers. Each controller consists of two modules. One module provides the processor, memory, Ovation networking and additional networking connections. The other module provides the interface to both local and remote Ovation and Q Line I/O, plus internal powering. Each functional processor in the redundant pair executes the same application program, although only one accesses the I/O and operates in control mode at a time. The partner processor runs in backup, configure or off-line modes with differences between them alarmed.

Control Mode

In control mode, the primary processor has direct I/O access to read, write and execute both data acquisition and control functions. In addition, the primary processor monitors the status and health of its backup partner’s processor and network.

Backup Mode

In backup mode, the backup processor performs diagnostics and monitors the status and health of the primary processor. The backup processor maintains up-to-date data by polling the control processor’s database memory and receiving all of the information that the control processor sends including process point values, algorithm tuning constants and variable point attributes.

Automatic Failover Control

The redundancy function of the Ovation OCR1100 controller is equipped with automatic failover control. If the processor in control mode fails, watchdog detection circuitry disables the I/O interface of the primary processor and informs the backup processor of the failure. The backup processor instantaneously begins to execute the process control application program and broadcast information over the Ovation network. Ovation controllers use a continual process of control memory updating to keep both the control and backup processors synchronized. This allows the algorithms to track the output values, pass the information upstream and apply the data during the first pass of execution.

The result is a bumpless failover, even in the case of a malfunction. A full range of events can trigger automatic failover, including:    Control processor failure  Network controller failure  I/O interface failure  Removal of power from the control processor  Control processor reset Once control is passed to the backup processor, the failed processor may be powered down, repaired and powered back up with no harmful effects on the executing control strategy. Upon restart, the repaired processor will detect that its partner is in control and assume the backup role. The processor in control will detect the presence of the backup processor and adjust for redundant operation.

Data Pass-Through

The OCR1100 controller is equipped with the ability to pass smart field device information to any workstation on the Ovation network. Users can take advantage of asset management solutions, such as Emerson’s AMS Suite, for remote management of intelligent field devices.

Open Architecture

The Ovation OCR1100 controller’s open architecture uses a powerful real-time operating system running a CompactPCI® i-bus PC design. This configuration allows rapidly advancing technology to be easily integrated into the control system while protecting software investments.