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Applying Fieldbus in Plant Control System

The engineering for fieldbus function blocks can be performed in the same way as for other function blocks

in FCS. The operation and monitoring environment is also the same for the fieldbus function blocks andother FCS function blocks. No additional requirements for engineering, operation and monitoring of thefieldbus applications in Yokogawa DCS.

Yokogawa DCS and Fieldbus Solution

The most favorable merit for applying fieldbus is high efficiently maintenance of field devices.For this purpose, a software package Plant Resource Manager (PRM) is added to software

lineup. With this PRM package, the advantage of fieldbus can be utilized so as to make the

maintenance of the whole system more efficient.

PRM: Plant Resource Manager

The maintenance information of devices are collected by PRM viafieldbuses and stored in the PRM database. The correspondingmaintenance schedules, maintenance procedures and spare parts

information are also stored accordingly in the same database. Themaintenance of the field devices can be performed though fieldbus.Thus the maintenance engineers are considerably relieved fromgoing to the fields of the devices in the remote areas and

hazardous areas.

Audit Trail

Audit trail management is important in both control and maintenance systems. All maintenance works on

devices, which are maintained by PRM, are recorded and stored, and can be easily retrieved too.

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Predictive Maintenance

By integrated management of device management information, the replacement cycle of devices and trend

of device troubles can be predicted. This technique minimizes the impact of device problems on plant

operation, and maintenance work and parts procurement can also be planned and scheduled.

Solutions to Non-Fieldbus Devices

PRM can create a database for legacy devices in addition to Fieldbus devices. Maintenance information is

recorded and managed in a database for integrated, overall planned maintenance of all devices in the plant.

Yokogawa realized the potential of field networks in a production control system early on and

designed its systems with field networks in mind. Yokogawa is committed to the standardization

of field communications.

FOUNDATION™ Fieldbus Products

Among the many FOUNDATION™ Fieldbus-enabled products it sells are

DCS industrial automation system

Pressure and differentialpressure transmitters Vortex flow meters Magnetic flow meters

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Temperature transmitters Valve positioners Paperless recorders