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ADAM-4550 User's Manual 17
4. ADAM-4550 Command Set
In order to avoid communication conflicts, all
actions are instigated by the host computer when
several devices attempt to send data at the same
time . The basic form is a command/response
protocol with the host initiating the sequence.
The host issues a command to a module with a
specified address and waits a specific amount
of time for the module to respond. If no re-
sponse is received, a time-out command aborts
the sequence and returns control to the host.
Syntax
[delimiter character] [address] [command] [data]
[carriage return]
Every command begins with a delimiter charac-
ter. Most of the commands can use a $ (dollar
sign) or a % (percentage sign), but the
Data Pass
mode
command uses one of eight special char-
acters. The delimiter character is followed by a
two-character address (hexadecimal) that spec-
ifies the target module. Depending on the com-
mand, an optional data string follows the com-
mand string. Every command is terminated by
a (cr) carriage return. Command sets are divid-
ed into two categories: configuration mode
commands and data pass mode commands: