Rockwell Automation 1797-OE8H FLEX Ex HART Analog Modules User Manual - Manual (Page 25)

Publication 1797-6.5.3 - March 2006
About the FLEX Ex HART Analog Modules 1-11
HART Initialize Tags
The HART_Target tag consists of four members:
• Path — HART_Target.Path
The Path specifies the direction the message follows to get to the
desired target node. The data type is string.
• Slot — HART_Target.Slot
The Slot indicates the specific place where the I/O module is attached
to the FLEX Ex adapter. The data type is SINT.
1 = the closest module to the adapter
8 = the module farthest from the adapter
0 = the adapter
• Channel
The Channel indicates which analog channel, 0 to 7, is desired. The data
type is SINT.
Your
Ladder-logic
Program
HART_Target
CMDx_cmd
Status
CMDx_reply
HART_CMD_x
Convert CMD
Data Type to
Generic HART
Frame
Convert Generic
HART Reply
Frame to Specific
Reply Data Type
Generic_HART
Command Frame
Generic_HART
Reply Frame
Status
Send_HART_SF
Send Message
to Target and
Poll for a
Response