Spectrum-controls 1734sc-OE2CIH Instrukcja Użytkownika Pobierz pdf (Strona 50)

4-14 Chapter 4: OE2CIH and HART

User’s Manual Pub. 0300272-01 Rev. A.0

HART STATUS BITS:

 INIT = HART device detected

 FAIL = No device found or communication failed

 MAFLT = HART does not match analog loop current

 MSGRDY = Ladder pass-through message available

 DDLDR = Device Data update Ladder

 DDLGX = Device Data update Logix

 SUA = Status Update Available, Cmd 48 data changed

 FAULT= HART device reports a fault

HART STATUS BYTE 1: Communication Status / Response Code

This if the first status byte returned in a Slave-to-Master frame. It is used for both

Communication Status and Response Code. If the Most Significant Bit is set a

communication error has been reported by the device. Otherwise the remaining 7 bits

contain the response code.

Bit Mask

Definition

0×80 =

1= Communication Error

0 = Response Code

0×40 =

Vertical Parity Error

Bits 6..0 = Enum 0 to 127, command-

dependent

0×20 =

Overrun Error

0×10 =

Framing Error

0×08 =

Longitudinal Parity Error

0×04 =

Reserved, always 0

0×02 =

Buffer Overflow

0×01 =

Reserved, always 0

HART STATUS BYTE 2: Field Device Status

This is the second status byte returned in a Slave-to-Master frame:

Bit Mask

Definition

0×80 =

Device Malfunction

0×40 =

Configuration Changed

0×20 =

Cold Start

0×10 =

More Status Available

0×08 =

Loop Current Fixed

0×04 =

Loop Current Saturated

0×02 =

Non-Primary Variable Out of Limits

0×01 =

Primary Variable Out of Limits

1 2 ... 45 46 47 48 49 50 51 52 53 54 55 ... 73 74

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