I N T E R F AC E M O D E L 9 8 4 0
MO D E L 9 8 4 0 P G 2 5
P U B .
6 0 3 2 - 0 1
To support the multi-drop Remote option each unit is assigned a communications
address, which is set using “Com Address” within the Systems Options of the Setup
Menu.
Communications Format
All the commands have the following format:
@123XYZ<CR>
The @ symbol initiates the command, all commands must begin with this symbol. The
number 123 is the address of the Model 9840 which should respond to this command.
This MUST be 3 digits so type 001 for unit one, and 026 for unit twenty-six. The
command itself will be a sequence of letters such as the XYZ shown above. If the
command requires a number as one of its parameters the number must be followed by
the pound sign “#”. Numbers that are less than one should include a leading zero so you
should type 0.123# to enter one hundred-twenty three thousandths. Commands are not
processed until a carriage return <CR> is sent.
No Model 9840 will respond to address 000. All Model 9840s will respond to address
255. Throughout the rest of this section we will assume that you are using address 123.
Whenever a Model 9840 executes a remote command it will issue an “acknowledge” that
includes the address and any required data.
