Command interface

The command interface allows you to configure the smart demand controller by sending specific commands using Modbus protocol. Reference the online Modbus register list for meter commands, results, and data types. For information on accessing the register list, see Register list.

• A. In the Command register, enter a meter command.

• B. In the Semaphore register, when using the protected command interface, enter the semaphore you are given (see Using the protected command interface). The semaphore register is not used with the unprotected command interface (see Using the unprotected command interface).

• C. In the Parameters register, enter all parameters for a meter command.

• D. The Status register displays 0 when the smart demand controller receives a command. Once the command is completed, the status register displays the same value as the command register.

• E. The Result register indicates if the command was successful, and if not, what error may have occurred.

• F. The Data register displays the executed parameters of a successful command and the invalid parameters based on data type of an unsuccessful command.

There are two command interfaces, protected and unprotected, described in the following sections.