Prosoft-technology MVI69L-MBS Uživatelský manuál stáhnout pdf (Strana 122)

Reference MVI69L-MBS ♦ CompactLogix Platform

User Manual Communication Module

Page 122 of 154 ProSoft Technology, Inc.

January 6, 2014

Func Code - Tells the Master to read the register values from the Slave. FC3.

Addr in Dev - Tells the Master where in the Slave's database to obtain the data.

In the above example, the Master's Modbus command to transmit inside the

Modbus packet is as follows.

Slave address

Function Code

Address in Device

Reg count

DEC

6100

HEX

17 D4

00 02

In the above example the (Enron/Daniel supporting) Slave's Modbus command to

transmit inside the Modbus packet is as follows.

Slave address

Function Code

Byte Count

Data

DEC

32.75 275.69

HEX

00 00 42 03 D8 52 43 89

In the above example the (a NON-Enron/Daniel supporting) Slave's Modbus

command that is transmitted inside the Modbus packet is as follows.

Slave address

Function Code

Byte Count

Data

DEC

32.75

HEX

00 00 42 03

1 2 ... 117 118 119 120 121 122 123 124 125 126 127 ... 153 154

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Prosoft-technology MVI69L-MBS Uživatelský manuál Strana 122