MVI56E-MNETR ♦ ControlLogix Platform
Configuring the MVI56E-MNETR Module
Modbus TCP/IP Interface Module with Reduced Data Block
User Manual
ProSoft Technology, Inc.
Page 57 of 175
June 14, 2011
Minimum Command Delay
0
to
65535
milliseconds
This parameter specifies the number of milliseconds to wait between the initial
issuances of a command. This parameter can be used to delay all commands
sent to Servers to avoid "flooding" commands on the network. This parameter
does not affect retries of a command as they will be issued when failure is
recognized.
Response Timeout
0
to
65535
milliseconds
This is the time in milliseconds that a Client will wait before re-transmitting a
command if no response is received from the addressed server. The value to use
depends upon the type of communication network used, and the expected
response time of the slowest device on the network.
Retry Count
0
to
10
This parameter specifies the number of times a command will be retried if it fails.
Float Flag
Y
ES
or
N
O
This flag specifies how the Server driver will respond to Function Code 3, 6, and
16 commands (read and write Holding Registers) from a remote Client when it is
moving 32-bit floating-point data.
If the remote Client expects to receive or will send one complete 32-bit floating-
point value for each count of one (1), then set this parameter to
Y
ES
. When set to
Y
ES
, the Server driver will return values from two consecutive 16-bit internal
memory registers (32 total bits) for each count in the read command, or receive
32-bits per count from the Client for write commands. Example: Count =
10
,
Server driver will send 20 16-bit registers for 10 total 32-bit floating-point values.
If, however, the remote Client sends a count of two (2) for each 32-bit floating-
point value it expects to receive or send, or, if you do not plan to use floating-
point data in your application, then set this parameter to
N
O
, which is the default
setting.
You will also need to set the
Float Start
and
Float Offset
parameters to
appropriate values whenever the
Float Flag
parameter is set to
Y
ES
.
Float Start
F
0
to
65535
This parameter defines the first register of floating-point data. All requests with
register values greater than or equal to this value will be considered floating-point
data requests. This parameter is only used if the
Float Flag
is enabled. For
example, if a value of 7000 is entered, all requests for registers 7000 and above
will be considered as floating-point data.