Spectrum-controls 1734sc-OE2CIH Instrukcja Użytkownika Strona 54

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4-18 Chapter 4: OE2CIH and HART
User’s Manual Pub. 0300272-01 Rev. A.0
Table 4-13 Read Dynamic Variables (Service Code = 4B)
Unconnected Message
Field
Value
Definition
Message Type
CIP Generic
Service Code
0×4B
Get Device
Information
Class Name
035D
HART Object
Instance
1 to n
Selects channel n-1
Object Attribute
None, leave this field blank
Request Size
0
No Request Data
Reply Size
2 to 36 bytes
(2) Size when information not available
(36) Size when valid Information returned
Number of Data
bytes returned
Request Data
HART Read Dynamic Variables - Request packet structure
Request Size = 0
Offset
Field
Value
Definition
No Request Data
Request Failed Reply
HART Read Dynamic Variables - Reply packet structure
Reply Size = 2
Offset
Field
Value
Definition
0
Status
34 = DR_RUNNING
(No Device or
connection process
not completed)
35 = DR_DEAD
(Channel is not HART-
enabled)
Command status
1
Pad
0
Pad byte
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