Spectrum-controls 1734sc-OE2CIH Manuel d'utilisateur télécharger pdf (Page 60)

4-24 Chapter 4: OE2CIH and HART

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

Request Succeeded Reply

HART Get Device Information - Reply packet structure

Reply Size = 120 bytes

Offset

Field

Value

Definition

112 to

115

DampingValue

(4 bytes–Float)

CMD#15, Bytes 11-14

116

WriteProtectCode

(1 byte)

CMD#15, Byte 15

117

Pad_2 for alignment

(1 byte)

118 to

119

PrivateLabelMfg16Bit

(2 bytes)

CMD#0, Byte 1 if HART Rev earlier

than 7

CMD#0, Bytes 19-20 if HART Rev

greater than or equal to 7

Table 4-16 Ladder Pass-through Init (Service Code = 0×4E)

Unconnected Message

Field

Value

Definition

Message Type

CIP Generic

Service Code

0×4E

Pass-through Init

Class Name

0×035D

HART Object

Instance

1 to n

Selects channel n-1

Object Attribute

None, leave this field blank

Request Size

2 to 257 bytes

HART Data and Command

Reply Size

4 bytes

Number of Data bytes returned

Request Data

HART Ladder Passthrough Init - Request packet structure

Request Size = 2 to 257 bytes

Offset

Field

Value

Definition

HART Command

0 to 255 (1 byte)

HART Command Number

HART Data Size

0 to 255 (1 byte)

Number of Data bytes for selected

HART command

2 to

256

HART Data bytes

0 to 255 (1 byte)

HART command data

1 2 ... 55 56 57 58 59 60 61 62 63 64 65 ... 73 74

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Spectrum-controls 1734sc-OE2CIH Manuel d'utilisateur Page 60

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