Rockwell-automation 1771-SPI,D17716.5.122 SPI PROTOCOL INTERFACE Manual de usuario descargar pdf (Pagina 31)

Defining Command and Status Blocks

Chapter 3

3-9

Table 3.H

Word/Bit

Definitions for the Custom Data Block (CDB)

Word

Number

Title Range Description

SPI Device ID starts at 00100000 20 Must use the SPIspecified device ID.

Determine

Configuration

000= Standard

001 = Custom

010 = Random Data

011 = Random Data Open

Use 001 for custom configuration

stored in SPI RAM.

Not used

Device

Address

32 to 255 decimal data

Use the address that you selected on the

device with switches.

Zone

Address

48 to 255 decimal data

Use for temperature control devices, only.

Otherwise, zero.

3 and 4 Not used Not used

stating at

Bitcommand

word

0 to 255 decimal data

Bitcommand words must match the

corresponding SPI codes that you loaded in

the CCB in type, quantity and order.

:: ::

two words

per

Numeric

preset

(32bit)

0 to 32,767 decimal data

Numeric setpoints, such as alarm limits, must

match the corresponding SPI codes that you

loaded in the CCB in type, quantity and order.

:: ::

two words

per

ASCII

string

(32bit)

0 to 32,767 decimal data

ASCII strings such as SPI Revision must

match the corresponding SPI codes that you

loaded in the CCB in type, quantity and order.

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 61 62

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Rockwell-automation 1771-SPI,D17716.5.122 SPI PROTOCOL INTERFACE Manual de usuario Pagina 31

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