Spectrum-controls 1734sc-IE2CH Manual do Utilizador descarregar pdf (Página 55)

Chapter 4: IExCH and HART 4-15

User’s Manual Pub. 0300257-01 Rev. A

The following tables describe the possible message responses.

Table 4-20 (Request Data)

Suspend Normal HART acquisitions - Request packet structure

Offset Field Value Definition

No Request Data

Table 4-21 (Reply Data)

Suspend Normal HART acquisitions - Reply packet structure

Offset Field Value Definition

0 Status (1 byte)

00 = SUCCESS

35 = DR_DEAD

1 Pad 0

4.3.6 Resume HART Communication

Used in conjunction with the HART suspend message, allows the user to resume HART

communication on a channel or channels if HART communication is currently

suspended.

The following table describes the class, service code and instances required to send the

Resume HART Communication message.

Table 4-22 (Resume HART Communication)

Unconnected Message

Field Value Definition

Message Type “CIP Generic”

Service Code 0x52 Resume HART

Class Name 0x035D HART Object

Instance 0-3

0 = All Channels

1-4 = Single Channel

All channels resume or a single channel

Object Attribute None, leave this field blank

Request Size 0 No Request Data

Reply Size 2 Number of Data bytes returned

The following tables describe the possible message responses.

Table 4-23 (Request Data)

Resume Normal HART acquisitions - Request packet structure

Offset Field Value Definition

0 No Request Data

1 2 ... 50 51 52 53 54 55 56 57 58 59 60 ... 83 84

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