Hart command tags -10, Hart command tags – Rockwell Automation 1797-OE8H FLEX Ex HART Analog Modules User Manual User Manual
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Publication 1797-6.5.3 - March 2006
1-10 About the FLEX Ex HART Analog Modules
HART Command Tags
The response from the HART command routines is located in their associated
reply tags:
• CMDx_Status (x is the specific command)
• CMDx_Reply (x is the specific command)
This tag is only returned when the specific HART command has data in
its reply. The CMDx_Reply tag contains the HART response
reformatted to their associated data type.
Table 1.1 CMDx_Status Tags
Tag Name
Description
Data Type
CMDx_Status.Started
Indicates when the command is in
process
BOOL
CMDx_Status.Done
Indicates when the command has
completed without error
CMDx_Status.Error
Indicates when the command has
completed with error
CMDx_Status.Error_Code
If the CMDx_Status.Error bit is set,
the associated error code is placed
here
INT
CMDx_Status.Cmd_Performed
If the CMDx_Status.Done bit is set,
the tag containing the HART
command performed is placed here
Table 1.2 CMD3_Reply Tags Example
Tag Name
Description
Data Type
CMD3_Reply.Current_mA
The measured current value
REAL
CMD3_Reply.PV_Units_Code
The units code for the primary value INT
CMD3_Reply.Primary_Value
The primary value
REAL
CMD3_Reply.SV_Units_Code
The units code for the secondary
value
INT
CMD3_Reply.Secondary_Value
The secondary value
REAL
CMD3_Reply.TV_Units_Code
The units code for the third value
INT
CMD3_Reply.Third_Value
The third value
REAL
CMD3_Reply.FV_Units_Code
The units code for the fourth value
INT
CMD3_Reply.Fourth_Value
The fourth value
REAL