Enron Modbus

Set Single Boolean (FC=05)

Request

This command is writing the contents of boolean variable  # 1073 to ON
to the slave device with address 4.

04 05 0431 FF00 DC90

04: The Slave Address
05: The Function Code (Force Single Boolean)
0431: The Data Address of the boolean variable. (1073 = 0431 hex)
FF00: The status to write ( FF00 = ON,  0000 = OFF ) 
DC90: The CRC (cyclic redundancy check) for error checking.

Response

The normal response is an echo of the query, returned after the boolean has been written.

04 05 0431 FF00 DC90

04: The Slave Address
05: The Function Code (Force Single Boolean)
0431: The Data Address of the boolean variable. (1073 = 0431 hex)
FF00: The status written ( FF00 = ON,  0000 = OFF ) 
DC90: The CRC (cyclic redundancy check) for error checking.

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