The DGH DIN-100 series products use
either a simple command and response ASCII protocol or the Modbus
RTU protocol. A module must be interrogated by a host computer to
obtain data. A module will never initiate a command sequence in order to
prevent communications collisions.
A command is initiated with a
command prompt, may be a dollar sign ($) or pound sign (#). Following the
prompt a single address character must be transmitted. Each module on a
communications bus must be setup with a unique address. The address is
followed by a two character command. Every command is terminated with a
carriage return.
The
module response begins with a response prompt, which is an asterisk (*)
followed by the necessary data. Every response is terminated with a
carriage return. Linefeeds after the carriage return are user selectable.
See the table below for typical commands and their respective response
messages.
