MVI69E-MBS ♦ CompactLogix™ Platform
Configuring the MVI69E-MBS Using PCB
Modbus Serial Enhanced Communication Module
User Manual
ProSoft Technology, Inc.
Page 41 of 159
If the remote Master expects to receive or sends 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 Slave driver
returns 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 Master for write commands.
Example:
Count =
10
, Slave driver sends 20 16-bit registers
for 10 total 32-bit floating-point values.
If, however, the remote Master 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 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
0 to 9998
Defines the first register of floating-point data. All requests with
register values greater-than or equal to this value is considered
floating-point data requests. This parameter is only used if the
Float Flag is enabled. For example, if you enter a value of
7000, all requests for registers 7000 and above are considered
as floating-point data.
Float Offset
0 to 9998
Defines the start register for floating-point data in the internal
database. This parameter is used only if the Float Flag is
enabled. For example, if you set the Float Offset value to 3000
and the float start parameter to 7000, data requests for
register 7000 use the internal Modbus register 3000.
