Emerson M-series MD Plus Controller

Introduction

The MD Plus Controller provides communication and control between the field devices and the other nodes on the control network. Control strategies and system configurations created on earlier DeltaV™ systems can be used with this powerful controller. The MD Plus Controller provides all the features and functions of the M5 Plus Controller, with plenty of memory for large batch and other memory-intensive applications.

The control languages executed in the controllers are described in the Configuration Software Suite product data sheet.

Benefits

Increases productivity

Faster. The MD Plus Controller is more than 400% faster than the M5 Plus Controller and over 3X the user configurable memory as the MD controller. The Ethernet ports are full duplex, 100MB/second maximum throughput. The results are lower CPU utilization and higher capacity for control strategies.

Self-addressing. The DeltaV controller is unique in its ability to automatically identify itself to the DeltaV control network. When the controller is powered up, it is automatically assigned a unique address—no dip switches, no configuring—just plug and play!

Self-locating. A controller’s physical location is easy to find. LEDs on the face of the controller can be made to flash, providing a strong visual clue.

Automatic I/O detection. The controller can identify all I/O interface channels located on the subsystem. As soon as an I/O interface is plugged in, the controller knows the general characteristics of the field devices managed by that I/O interface. This reduces the no value engineering associated with configuration — easy!

Easy to use

Total control. The controller manages all control activities for the I/O interface channels. It also manages all communication functions for the communications network. Time tamping, alarming, and trend objects are also managed within the controller. The controller executes all control strategy with execution speeds up to every 100 ms.

Data protection. Each time you install data in a DeltaV controller, the installation information is automatically saved. Likewise, when users make online configuration changes to a controller, the system stores these changes as well. This way, the system always retains a complete record of all the data that has been installed in the controller and any online changes that have been made.

Cold restart. This feature ensures that in case of power failure, the controller will restart without manual intervention and without any other device present on the network. Now, you don’t have to reboot from the workstation. Simply set the restart state of the controller to current conditions.

Note: To prevent process disruption during a short power loss, an uninterruptible power supply (UPS) is available for the controller.

Has the flexibility to meet your needs

Advanced operations. The MD Plus Controller is equipped to handle the DeltaV Batch option, as well as advanced control functions.

You can also use advanced control function such as Neural and Model Predictive Control on the MD Plus controller.

Data pass-through. The controller is equipped with the ability to pass smart HART information from field devices to any workstation node in the control network. This means you can take advantage of applications, such as Asset Management Solutions, that enable you to remotely manage the HART information contained in your HART or FOUNDATION fieldbus-equipped devices.

Prepares you for the future. As your system grows, you can expand your software license to increase the number of device signal tags (DSTs) allocated to the DeltaV controller. Begin with 50 and expand to 750 DSTs. Control strategy complexity and control module scan rates determine overall controller performance and application size. A redundant controller may be added to back up an MD Plus Controller online. The standby controller comes online automatically, with a bumpless transition. For more information, refer to the I/O Redundancy product data sheet.