Category: Industry Trends

I/O Card Redundancy

Redundant I/O cards are available for critical applications.

The same card can be used in simplex or redundant applications.

When installed on a two-wide redundant terminal block, the cards are recognized as a redundant pair by the controller.

The controller scans each card and determines which card is acting as the active interface.

When a fault is detected, the system automatically switches to the standby I/O card.

DeltaV Control modules reference simplex and redundant I/O channels identically 

and there is no special configuration required to take advantage of redundancy.

Switchover of a redundant I/O card is completed within two scans of the I/O bus.

Make-before-break contacts ensure digital field instruments remain powered and the process is undisturbed.

Analog output signals are briefly driven by both cards for < 5 ms during switchover of the card.

Hardware Alerts automatically report hardware integrity errors for both the primary and secondary cards.

Any event that causes a switchover is also reported automatically through the system hardware alerts and is logged in the Event Chronicle.

Events that can cause a switchover include.

Hardware failure within the active card.

Communications failure between the active card and the controller.

Detection of a fault in the field wiring.

A switchover may also be initiated from the diagnostics explorer, and the health and status of both cards and 

their channels are available in the diagnostics explorer.

The system automatically commissions a new standby card.

In safe areas, failed cards can be replaced under power.

In hazardous areas, appropriate installation procedures must be followed.

Increases productivity

Real-time, online equipment additions: Online addition of new I/O interfaces means your process does not get interrupted.

As new equipment is added, the DeltaV Explorer

acknowledges it and assigns it basic configuration.

Increases process availability

1:1 Redundancy for Traditional and HART I/O cards:

DeltaV redundant I/O uses the same Series 2 I/O cards as  non- redundant I/O.

This allows you to leverage your investment in installed I/O and in I/O spares.

No additional configuration is needed when using a redundant channel. 

The redundant terminal blocks provide the same field wiring connections  as simplex blocks, so there is no extra wiring needed.

Autosense of redundancy: DeltaV autosenses redundant I/O, which greatly simplifies the task of adding redundancy to the system.

The redundant pair of cards is treated as one card  in the system tools.

Automatic Switchover: Should a primary I/O card fail,

the system automatically switches to the “standby” card without user intervention.

The operator is given clear notification of a switchover at the operator display.

Decreases installation time and expense

Plug-and-play installation saves money: All Traditional I/O components plug into the I/O interface carrier.

You can install the I/O interface carriers to manage anticipated growth and postpone

the I/O interfaces until you’re ready to install your additional field devices.

Phased installation saves time: As soon as you mount the I/O interface carrier, you’re ready to begin installing the field devices.

I/O terminal blocks plug directly onto the I/O interface carrier.

There is no need to have the I/O cards installed.

Keys: Traditional I/O interfaces and terminal blocks have  I/O function keys.

These keys ensure that the correct I/O  card is always plugged into the corresponding terminal block.

It’s incredibly easy to use and gives you time to do more.

This design enables you to initially install Traditional I/O  quickly and efficiently.

When you need to replace an I/O card, the function key design ensures that you will always install  it correctly.

This keying system provides a safety measure  by preventing the wrong I/O interface’s being installed.

Control Execution 

Like the Ovation OCR1100 controller, the OCR3000 performs complex modulation,

discrete and sequential control strategies, as well as data acquisition and monitoring functions.

The OCR3000 controller can generate up to 64,000 points. 

With a quad-core processor, the OCR3000 controller supports up to five control tasks with loop speeds ranging from 10 milliseconds to 300 seconds.

Each control task consists of an I/O flow point input scan, a control scheme execution, and an output scan.

The loop speed for all five control tasks is user selectable.

Each of the five control tasks can range from 10 milliseconds to 300 seconds.

Connectivity 

The OCR3000 includes an embedded Ethernet link protocol driver for connecting to intelligent electronic devices

(IEDs) and other third-party devices with embedded controllers, such as smart inverters and other devices.

The OCR3000 includes embedded Ethernet link protocol drivers to communicate with intelligent electronic devices (IEDs)

and other third-party devices with embedded controllers, such as smart inverters,

weather stations, relay protection systems, or motor control centers.

The Scalable Controller performs data acquisition functions by using on-board communication protocol drivers to communicate

with Ethernet-enabled I/O systems from a wide range of vendors, as well as various types of PLCs, PACs, and RTACs.

Process Applications

The OCR3000 controller is designed to meet the demanding requirements

of a wide range of process applications, including :

Continuous PID (Proportional-Integral-Derivative) control 

Sequential function chart control 

Boolean logic 

Advanced Control 

Model predictive control 

Fuzzy logic 

Neural Networks  

Special Logic and Timing Functions 

Data Acquisition 

Event Sequence Processing 

Process point sensor/limit checking 

Process point alarm handling 

Process point conversion to engineering units 

Process point database storage 

Local and remote I/O interfaces 

Process point labeling