Using the unprotected command interface

The unprotected command interface allows you to issue a broadcast command to multiple meters at once. The unprotected command interface ignores the semaphore register.

Although some applications require the unprotected command interface, it is recommended that you use the protected command interface whenever possible.

To send a meter command using the unprotected command interface:

1. Build the packet to be written to the command block.

2. Write the packet as a Modbus block write (enter the command number, any number as the semaphore, and the parameters at the same time).

   Unprotected Command Block Example

   Command Block	Register #
   Command	2039
   Semaphore	___
   Parameters	1

3. Monitor the meter response registers for validity and completion.

   Unprotected Meter Response Example

   Meter Response	Register #
   Status	2039
   Result	0
   Data	1