User manual

Configuring the MVI56-HART Module MVI56-HART ♦ ControlLogix Platform
User Manual HART Multi-drop Master Communication Module
Page 44 of 171 ProSoft Technology, Inc.
October 13, 2011
Done DB Address
-1 to 3999
This field specifies the internal database register to be used to signal the successful
execution of a command. When a command is successfully executed a "-1" is written to
this register. This "Done DB Address" can be shared with the "Enable DB Address" of
another command to do a chained command execution.
Write DB Address
-1 to 7999 Bytes
This field specifies the internal database register to use as a source of data for HART
commands that include data. It is possible to include data with every HART command,
but only if the command and the device will accept this data.
If this value is "-1", it indicates that there will not be data with the command or that it will
not come from the database.
Note: This value is specified in Bytes, not Words.
Swap Code
0, 1, 2, 3
This parameter defines the byte order of each four-byte group of data received. This
parameter is helpful when dealing with floating-point or other multi-register values, as
there is no standard byte order for storing these data types. The following table describes
the values and their associated operations:
Swap Code Description
0 None - No Change is made in the byte ordering (1234 = 1234)
1 Words - The words are swapped (1234=3412)
2 Words & Bytes - The words are swapped then the bytes in each word are
swapped (1234=4321)
3 Bytes - The bytes in each word are swapped (1234=2143)
Byte Count
0 to 250
This parameter specifies the number of bytes to be sent to a HART device in the
command. If the command has no data then this value should be "0".
If the value of this field is different of "0" and "Write DB Address" is different of "-1" then
the data for the command will be taken from the Virtual Database. If the value of this field
is different of "0" and "Write DB Address" is "-1" then the data for the command will be
from the "Fixed Data" field for the command.
Fixed Data
Up to 250 HEX values separated by space
This parameter is a string of HEX values to be sent with the HART command. There
should be at least the number of bytes specified in the "Byte Count" parameter. The
bytes should be written in hexadecimal format and separated by a space. This data will
be sent if the Parameter "Write DB Address" is "-1" and "Byte Count" is greater than "0",
and it will be sent in the same order that they are written.