Instruction Manual

Instruction Manual Supplement

D103639X012

DVC6200 Digital Valve Controller

August 2014

Command 48: Read Additional Status

This command was significantly revised in HART 7, but can operate in backward compatible mode for HART 5 masters

which do not supply data bytes in the request.

Supplying data bytes allows you to acknowledge the current status, and cause the more_status bit to be withdrawn

until some status bit changes value.

Exactly 0 or 9 data bytes must be supplied. If supplied, the data must exactly match the current command 48 response

in order for the more_status bit to be withdrawn.

Byte Format Description

Request

Data

bytes

0 or 9 None or nine bytes of status.

Response

Data

Bytes

0 Uint8 Command 48 Response Byte 0

1 Uint8 Command 48 Response Byte 1

2 Uint8 Command 48 Response Byte 2

3 Uint8 Command 48 Response Byte 3

4 Uint8 Command 48 Response Byte 4

5 Uint8 Command 48 Response Byte 5

6 Uint8 HART 7 Extended Field Device Status byte

7 Uint8 HART 7 Operating Mode byte

8 Uint8 HART 7 Standardized Status 1 byte

Code Class Description

Command

 specific

Response

Codes

Too few data

bytes

0 < x < 9, or x > 9

14 Data Mismatch Data was supplied but does not match current status