User manual

Configuring the MVI56-HART Module MVI56-HART ♦ ControlLogix Platform
User Manual HART Multi-drop Master Communication Module
Page 36 of 171 ProSoft Technology, Inc.
October 13, 2011
Retry Count
0 to 10
This parameter sets the number of retries for a command if the command response is not
received from the slave device. This parameter is normally set to a value of 3. The
module will accept values of 0 to 10.
DB Address Status
-1, 0 to 3999
This parameter is utilized to set the database address in the module where the status
word for the channel will be placed. If the parameter is set to -1, the word value will not
be placed in the database. If a value from 0 to 3999 is set for the parameter, the status
word for the channel will be placed at the specified database offset. This word is bit
mapped with each bit representing a slave device. The bit will be set if slave device has a
communication error.
Slave List Status
The configuration parameter "DB Address Status" defines the register address in the
virtual database where the status data for each HART channel will be placed. This word
has one bit for each HART device and if this bit is in "1" it means that the corresponding
HART device is not answering to the poll.
Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
HART
Device
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
The bit 0 of the "Slave List Status" is used for a slave connected in a point-to-point
configuration. In this mode, the slave’s 4 to 20 milliamp signal will also be active and can
be utilized by an analog input or out module depending on the signal type.
Command Count
0 to 99
This parameter sets the number of user commands to be utilized. The first command in
the list is always reserved for the auto-poll command so the user should configure this
value considering one command for the auto-poll. For example, if the user configures two
commands, the command count parameter should be set as 3. This parameter can be
set from 0 to 99. If the parameter is set to a value other than 0, commands should be
present in the [HART PORT x COMMANDS] section.
Auto-Poll Code
p2p, multidrop, or Not used
This parameter sets the auto-poll mode of the channel. If the parameter is set to "p2p",
the module will automatically poll device 0 in point-to-point mode. If the parameter is set
to "multidrop", the module will automatically poll multiple devices. If the parameter is set
to "Not used", the auto-polling option will be disabled and only commands in the
command list will be utilized for the channel. In the auto-poll mode, the module will
automatically execute HART commands 0, 3, 13, 14, and 15.