Spectrum Controls 1734sc-OE2CIH - Manual (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
0 HART Command 0 to 255 (1 byte) HART Command Number
1 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