Adam-4550 Command Set - Advantech ADAM-4550 User Manual

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.
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
ADAM-4550 User's Manual
characters. The delimiter character is followed
by a two-character address (hexadecimal) that
specifies the target module. Depending on the
command, an optional data string follows the
command string. Every command is terminated
by a (cr) carriage return. Command sets are
divided into two categories: configuration
mode commands and data pass mode
commands:
If no re-
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