Rockwell-automation 1771-SPI,D17716.5.122 SPI PROTOCOL INTERFACE Instrukcja Użytkownika Pobierz pdf (Strona 32)

Defining Command and Status Blocks

Chapter 3

3-10

The SPI module responds to the custom configuration block (CCB) by

reflecting it back to the PLC processor as custom configuration status

(CCS) unless the SPI module detects:

an error in the CCB

it cannot store the CCB

Upon detecting either of the above, the SPI module inserts error

information in the CCB and returns it as the CCS as follows:

sets the configuration error CE bit to 1

loads fault diagnostics into word 3

Table 3.I

Bit/Word

Map of Custom Configuration Status (CCS)

Word 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

1 CE CA DC Device Identification

2 Number of Numeric Setpoints or 0 Number of Bitcommand Words or 0

3 Number of Bitstatus Words or Fault Diagnostics Number of ASCII Strings or Fault Diagnostics

4 Number of ASCIIstatus Strings or 0 Number of Numericstatus Words or 0

5 CMD1 (for example, 20) CMD2 (for example, 49)

: CMD1 (for example, 20) CMD2 (for example, 31)

: CMD1 (for example, 20) CMD2 (for example, 22)

64 CMD1 (for example, 20) CMD2 (for example, 44)

Custom Configuration

Status (CCS)

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 61 62

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Rockwell-automation 1771-SPI,D17716.5.122 SPI PROTOCOL INTERFACE Instrukcja Użytkownika Strona 32