ProSoft MVI69E-MBS User Manual page 121

MVI69E-MBS ♦ CompactLogix Platform
Modbus Serial Enhanced Communication Module
Example #2: master is issuing Modbus command with FC 16 (with Float Flag: No) to transfer
Float data.
Float Flag: "N" tells the master to ignore the floating values and treat each
register data as a data point composed of 1 word, 2 bytes or 16 bits.
Float Start: Ignored.
DB Addr - same as when Float Flag: Y.
Reg Count - Tells the master how many data points to send to the slave.
Swap Code - same as when Float Flag: Y.
Func Code - same as when Float Flag: Y.
Addr in Dev - same as when Float Flag: Y as long as the slave's Float Flag = Y.
In the above example, the master's Modbus command to transmit inside the
Modbus packet is as follows.
Slave
Address
DEC 01
HEX 01
ProSoft Technology, Inc.
June 28, 2017
Function Address in Reg
Code Device Count
16 7100 2
10 1B BC 00 02
Byte Data
Count
4 85.37
04 BD 71 42 AA
Reference
User Manual
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