Configuring the MVI56-HART Module
MVI56-HART ♦ ControlLogix Platform
User Manual
HART Multi-drop Master Communication Module
Page 42 of 171
ProSoft Technology, Inc.
October 13, 2011
Float DB Address
0 to 3998
This field specifies the internal database register where the floating point values returned
by the command will be placed.
Poll Interval
0
TO
65535
This parameter specifies the minimum interval between executions of a continuous
commands (
Enable
code of 1). The value is in seconds. Therefore, if a value of 10 is
entered, the command will execute no more frequently than once every 10 seconds.
FP Word Count
-1 to 125
This parameter specifies the number of words from the floating point data returned by a
HART command that will be placed on the Virtual Database. If this parameter is 0 no data
will be written to the Database. If this parameter is -1 then all the floating point data will
be written in the integer block of data.
Special care should be taken with this number, because is a word count and a floating
point value is 2 words long. For example if you execute a HART command 3 which takes
5 floating point values from the device, you should place a word count of 10 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)
Short Address
0 = Point-to-Point
1 to 15 = Multi-drop
This parameter specifies the HART slave node address on the network to which the
command will be sent. Values of 0, or 1 to 15 are permitted. If the device to be addressed
only accepts long address, then the parameter "Use Long" should be selected so the
module can ask for the long address with the short one and then execute the command.
