Rockwell-automation 1771-SPI,D17716.5.122 SPI PROTOCOL INTERFACE Instrukcja Użytkownika Pobierz pdf (Strona 29)

Defining Command and Status Blocks

Chapter 3

3-7

Table 3.F

Word/Bit

Definitions of the Custom Configuration Block (CCB)

Word

Number

Bit

Number

Title Range Notes

0-7 Device ID 00100000 to 11111110 Use the SPIspecified device ID.

8-10

Determine

Configuration

(IDspecific)

100 = Store configuration >

101 = Read configuration >

110 = Overwrite configuration >

111 = Clear configuration >

If device ID matches a stored ID, SPI returns an error.

If SPI finds no matching ID, it returns an error.

If SPI finds matching ID, new config overrides old.

SPI returns a flag, and ignores all other data in CCB.

Clear All

0 = No action

1 = Clear all configurations

The SPI module clears all stored configurations.

12-15 Not used

0-7

Number of

Bitcommand

Words

0 to 60 decimal data

Tells the SPI module how many words containing bit

commands to expect in the CDB.

8-15

Number of

Numeric

Setpoints

0 to 30 decimal data

Tells the SPI module how many setpoints and/or

alarm limits to expect in the CDB.

0-7

Number of ASCII

Strings

0 to 30 decimal data

Tells the SPI module how many ASCII strings to

expect in the CDB.

8-15

Number of

Bitstatus Words

0 to 30 decimal data

Tells the SPI module how many words containing

status bits to return to the processor in the CDS.

0-7

Number of

Numericstatus

Words

0 to 30 decimal data

Tells the SPI module how many numeric status words

such as temperature or flow to return in the CDS.

8-15

Number of

ASCIIstatus

Strings

0 to 30 decimal data

Tells the SPI module how many ASCII strings such as

SPI Revision to return to the processor in the CDS.

Starting

8-15 CMD1 starts at 00100000 20

SPI code pair for the specified

bit command word sent to the SPI module

word 5

0-7

CMD2 starts at 00100010 22

bitcommand word sent to the SPI module.

For example: 20 49 for Mode, Machine

Note 1

8-15 CMD1 starts at 00100000 20

SPI code pair for the specified

numeric setpoint sent to the SPI module

Note 1

0-7

CMD2 starts at 00100010 22

numeric setpoint sent to the SPI module.

For example: 20 31 for Temperature Setpoint

Note 1

8-15 CMD1 starts at 00100000 20

SPI code pair for the specified

ASCII string sent to the SPI module

Note 1

0-7

CMD2 starts at 00100010 22

ASCII string sent to the SPI module.

For example, 20 22 for SPI Revision

Note 1

8-15 CMD1 starts at 00100000 20

SPI code pair for the specified

bit status word sent to the processor

Note 1

0-7

CMD2 starts at 00100010 22

bitstatus word sent to the processor.

For example, 20 44 for Status, Machine

Note 1

8-15 CMD1 starts at 00100000 20

SPI code pair for the specified

numeric status word returned to the processors

Note 1

0-7

CMD2 starts at 00100010 22

numeric status word returned to the processors.

For example, 20 72 for Process Temperature

Note 1

8-15 CMD1 starts at 00100000 20

SPI code pair for the specified

ASCII status word returned to the processor

Note 1

0-7

CMD2 starts at 00100010 22

ASCII status word returned to the processor.

For example, ?? ??

Note 1: Load

commandcode pairs in the order given. Leave no blank words. If not using a specified type of command code, the SPI module

expects the next type instead. Command codes for status specify the type of status that you want returned in the CDS.

1 2 ... 24 25 26 27 28 29 30 31 32 33 34 ... 61 62

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