Spectrum Controls 1734sc-OE2CIH User Manual
Page 56
4-20
Chapter 4: OE2CIH and HART
User’s Manual Pub. 0300272-01 Rev. A.0
Request Succeeded Reply
HART Read Dynamic Variables - Reply packet structure
Reply Size = 36 bytes
Offset Field
Value
Definition
31
FV Status
(1 byte)
1 byte status from Command 9
OR if Rev 5 device:
0×C0 = Connected and Device
provides this value in CMD 3 (that
is, does not truncate)
0×00 = Not Connected
32-35
Loop Current
(Float–4 bytes)
Device reported digital loop current
value. (Value from Cmd 3 for Rev 5
devices or Cmd 2 if later than Rev
5 device)
Table 4-14 Read Additional Device Status (Service Code = 4C)
Unconnected Message
Field
Value
Definition
Message Type
CIP Generic
Service Code
0×4C
Read Additional
Status
Class Name
0×035D
HART Object
Instance
0
1 to n
Selects All Channels
Selects channel n-1
Object Attribute
None, leave this field blank
Request Size
0
No Request Data
Reply Size
2 to 448 bytes
(2) Size when information not
available(Instance 1 to 16)
(28) Up to this Size when valid Information
returned for a single channel(Instance 1 to n)
(28*n) Fixed size returned for Instance 0
Number of Data
bytes returned
Request Data
HART Read Extended Status - Request packet structure
Request Size = 0
Offset
Field
Value
Definition
No Request Data