Flowserve MX/QX Profibus DP/PA Field Unit Manual de usuario descargar pdf (Pagina 38)

PB DPV1 / PA Field Unit Installation and Maintenance FCD LMENIM2336-03 – 12/12

Software

3.1 PROFIBUS Protocol

This ﬁeldbus system uses the PROFIBUS ﬁeldbus protocol to communicate over the PROFIBUS

network with other PROFIBUS devices. The signals are encoded using the Non-Return to Zero

(PROFIBUS DP) and Manchester Biphase-L (PROFIBUS PA) technique. The signals are called

synchronous serial because the clock information is embedded in the serial stream. The protocol

uses built-in error checking rules when processing data.

3.2 PROFIBUS Function, Transducer,

and Physical Blocks

The MX/QX Actuator is designed to comply with the PROFIBUS PA Proﬁle, Version 3.0. This proﬁle

provides the user with a standard interface for control and management.

This standard proﬁle provides the following blocks for the network user. Details of each block are

described in the following paragraphs.

• One Physical Block

• One Transducer Block

• Several Function Blocks

The Physical Block is used for general device management. A device contains only one Physical

Block. Physical Blocks are usually used during commissioning and maintenance, and contain

parameters such as:

• Manufacturer’s Name

• Device Name (ID)

• Device Serial Number

• Identiﬁcation and Maintenance (I&M) Functions

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Flowserve MX/QX Profibus DP/PA Field Unit Manual de usuario Pagina 38