MVI69E-MBS ♦ CompactLogix Platform Reference
Modbus Serial Enhanced Communication Module User Manual
ProSoft Technology, Inc. Page 121 of 154
June 28, 2017
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.
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