Rockwell-automation 1797-OE8H FLEX Ex HART Analog Modules User Manual Manual de usuario descargar pdf (Pagina 144)

Publication 1797-6.5.3 - March 2006

B-20 FLEX Ex HART Module Commands

Command 147

Command 147 is the Write Normal SCAN command.

Command 148

Use the Read SCAN Status command to specify the status of the SCAN

function. Where 0 = SCAN function disabled (default after you cycle power);

1 = normal SCAN function activated; and 2 = special SCAN function

activated (see Command 158 and Command 159). There are no request data

bytes.

Table B.21 Command 147 Request and Response Data Bytes

Byte Description Value

Request Data Bytes

0 SCAN_CMD Scan command 1 = Command 1

2 = Command 2

3 = Command 3

Response Data Bytes

0 SCAN_CMD Scan command 1 = Command 1

2 = Command 2

3 = Command 3

Command-specific Response Codes

2 Error Invalid selection

5 Error Too few data bytes received

16 Error Access restricted

32 Error Busy

Table B.22 Command 148 Response Data Bytes

Byte Description Value

Response Data Bytes

0 SCAN_EN General scan status 0 = All scanning

disabled

1 = Normal scan

enabled

2 = Special scan

enabled

Command-specific Response Codes

16 Error Access restricted

32 Error Busy

1 2 ... 139 140 141 142 143 144 145 146 147 148 149 ... 195 196

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Rockwell-automation 1797-OE8H FLEX Ex HART Analog Modules User Manual Manual de usuario Pagina 144