Spectrum Controls 1734sc-OE2CIH - Manual (Page 58)

4-22 Chapter 4: OE2CIH and HART
User’s Manual Pub. 0300272-01 Rev. A.0
Table 4-15 Ladder Get Device Information (Service Code = 0×4D)
Unconnected Message
Field Value Definition
Message Type CIP Generic
Service Code 0×4D Get Device
Information
Class Name 0×035D HART Object
Instance Name 1 no n Selects channel n-1
Object Attribute None, leave this field blank
Request Size 0 No Request Data
Reply Size 2-120 bytes
(2) Size when Device information not
available
(120) Size when valid Device Information
returned Number of Data
bytes returned
Request Data
HART Get Device Information - Request packet structure
Request Size = 0
Offset Field
Value Definition
No Request Data
Request Failed Response
HART Get Device Information - Reply packet structure
Reply Size = 2
Offset Field Value Definition
0 Status 34 = DR_RUNNING
35 = DR_DEAD Command status
1 Pad 0 Pad byte
Request Succeeded Reply
HART Get Device Information - Reply packet structure
Reply Size = 120 bytes
Offset Field Value Definition
0 Status 00 = SUCCESS Command status
1 HARTManufID_EdtMSB (1 byte) CMD#0, Byte 1
2 HARTDeviceType_EdtLSB (1 byte) CMD#0, Byte 2
3 HARTPreamble (1 byte) CMD#0, Byte 3
4 HARTUnivCmdCode (1 byte) CMD#0, Byte 4
5 HARTTransSpecRev (1 byte) CMD#0, Byte 5
6 HARTSoftwareRevision (1 byte) CMD#0, Byte 6
7 HARTHardwareRevision (1 byte) CMD#0, Byte 7