Rockwell Automation 1794-OF8IH FLEX Isolated Input/Output HART Analog Modules - Manual (Page 106)

Publication 1794-UM065B-EN-E - September 2010
94 Configure Module Messaging
Chapter Summary In this chapter, you read how to configure the 1794-IF8IH and 1794-OF8IH
HART modules to automatically collect data from the HART field device and
place it in the module's Input Tag. The next chapter describes how to
troubleshooot your module.
3 Next
Assembly
Attribute
OR
HART Failed
Reason Code
if Query
Status = 3 0x81…0x86
1…0x88 HART Failed
Reason Code
Recommended assembly to read next
else returns 0 if this is the last page.
If Query Status is equal to 3, then this
value is the Failed Reason Code.
4 Number of
HART Data
bytes
returned in
this reply
(this page) 0…40 Bytes in this page that are valid
starting at offset 8 ( page reply size
excluding the 8 bytes of header
5 Page Number
of this reply 0…5 Page Number of this reply.
After a buffer reply read the page is
incremented internal to module so
that the next read contains the next
page.
6 HART Com
Status Byte 0…255 1st Status Byte returned from Device
7 HART Field
Status Byte 0…255 2nd Status Byte returned from Device
8…47
per
page HART reply
Data 0…255 If request type was EASY-Hart format
then this data array is the HART Data
bytes from the device's reply
message.
If Request was FULL-Hart Protocol
format then this data array is the
complete HART reply message
excluding the preamble bytes.
Preamble bytes are removed from the
reply by the module.
Data Response Packet Structure
Offset Field Value Definition