Rockwell Automation 1794-OF8IH FLEX Isolated Input/Output HART Analog Modules - Manual (Page 105)

Publication 1794-UM065B-EN-E - September 2010
Configure Module Messaging 93
Format a "Read Pass through Reply" Request
This message returns the status of pass through message along with the actual
reply from the device if the pass through is completed. The handle associated
with the response data is either the last HART message initiated or the handle
selected by the "Select Handle" message whichever occurred the most recent.
IMPORTANT
″
Message replies are held by the module until either the
message is retrieved or a 50 second timeout has expired.
″
If a message has multiple pages, each page must be sent
within 50 seconds of each other until all pages are sent else
the module will discard the whole message and make the
message queue available for the next new requested
message.
″
If the device does reply to the Pass through request but
reports a problem with the HART command selected in EASY
HART format then the Query Status is 3 (Failed) but in the
FULL HART Protocol format the reply from the device are
returned and the Query Status is 0 (Success).
Unconnected Message
Field Value Definition
Message Type "CIP Generic"
Service Type Get Attribute Single Read from Module
Service Code 0x0E
Class Name 0x7D FLEX Module Object
Instance 1…8 (Module next to Adapter = 1) Module Location
Object Attribute 0x81…0x86 Get Status
Reply Size
8…48 bytes
(1)
(1) depends on attribute selected
Request Size 0
Data Response Packet Structure
Offset Field Value Definition
0 Query Status 0…5 Status of Command related to Handle
1 Channel 0…7 (Handle active)
0xFF (Handle not active) Channel associated with Status
2 Handle 0…255 Message Handle