ABB TB82PH Provozní pokyny stáhnout pdf (Strana 24)

I-E67-TB82FF-2A February 13, 2002

Sensor

Field Device

Transducer Block

Resource

Block

Fieldbus

Channel Values

Block Parameters

AI Block

Out

Algorithm

Acyclic Data

Cyclic Data

Channel

Figure 30 – FBAP Interaction Diagram

Function blocks contain Fieldbus Foundation-defined

parameters that have been defined by the

specifications governing this communications

technology. In addition to these parameters,

manufacturer-specific parameters are commonly

found in most FF devices. The TB82EC FF

Transmitter contains several manufacturer-specific

parameters in the Transducer Block; however, the

Resource and Analog Input Blocks are standard FF

blocks.

As also required by the Fieldbus Foundation

specifications, the Device Blocks have to satisfy

certain defined operating modes. Each block supports

the operating modes as described in the table below.

BlocksOperational

Mode

Resource Transducer Analog

Input

Manual (MAN) N/A N/A YES

Automatic

(AUTO)

YES YES YES

Out of Service

(OOS)

YES YES YES

The following tables and diagrams contain information

regarding block parameters and the structure of these

parameters within the block. To assist in the

interpretation of this information, the following list of

column definitions is provided.

• Index (IDX) – Defines the number corresponding

to the sequence of the parameter relative to the

beginning of the corresponding block in the

object dictionary

Object Dictionary indices at which the blocks

start:

Resource Block – 259

Analog Input 1 – 350

Analog Input 2 – 390

Transducer Block – 430

• Name – Lists the mnemonic character

designation for the parameter.

• Description – Provides a short text description of

the block parameter.

• Bytes – Lists the memory size of the block

parameter.

• Store (ST) – Defines the type of variable for the

block parameter. ‘S’ represents a Static variable

that is typically a device parameter such as the

type of temperature sensor or variable

linearization function. This variable can only be

written during an acyclic process and if the AR is

Read/Write. Writing to a static parameter

changes the static revision of the counter

ST_REV. ‘N’ represents a Non-volatile variable.

Non-volatile parameters are stored internally in

the device. This variable is periodically stored to

ensure the fixed life of the memory is not

shortened. NV_CYCLE_T sets the writing

interval. This parameter cannot be changed. ‘D’

represents a Dynamic variable. The value for

this variable is calculated by the block and can be

read by another block.

• Access Rights (AR) – Defines the access rights

of the block parameter. ‘R’ represents a

parameter that only has Read access. ‘R/W’

represents a parameter that has Read and Write

access.

• Default – Lists the default setting for the listed

block parameter during initial start up or when a

Cold Start is initiated.

• Valid Range – Lists the valid range of selections

for the listed block parameter.

• Note – Identifies additional information for the

listed block parameter that is available at the end

of the block object tables.

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 59 60

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