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IronHorse GSDA-CM-8 User Manual – 1st Ed. Rev. A – 10/15/19
Value
Baud Rate
1
300
2
1200
3
2400
4
4800
5
9600
6
19200
7
38400
8
57600
All of the members of a network should have the same baud rate.
NOTE: Baud Rate changes take effect immediately.
Format for Messages
The GSDA-CM-8 has been designed to reject all but the following:
•
The Numbers from 0 thru 9
•
UPPERCASE ONLY letters from A thru Z
•
The “comma” (,) character (used to separate different parts of a message)
•
The “carriage return” character (used to end each message)
If invalid characters are used the command will fail. For numbers with a decimal point (or colon) in
them, do not send the decimal point (or colon). Also, “leading zeroes” for a number are not needed.
“0001”, “001”, “01”, and “1” are all the same to the GSDA-CM-8.
NOTE: All addresses must be two digits so 01 through 09 must have a leading zero.
All messages sent to the GSDA-CM-8 follow a common structure, or “format”. The command message
format is shown below:
<command><address>,<”command stuff”><CR>
Format
Description
<command>
A two-letter UPPERCASE command. There is NO comma
between the command and the <address>
<address>
A number (01 thru 99) representing the device that this
message is intended for. Using an address of “00” will cause
all devices to react to the message. This number is followed
by a comma.
<”command data”>
The portion of the command message that is unique to
each command. See the details of the commands for this
information. There is NO comma after the end of this
portion of the message, although there may be commas
within “command data”.
<CR>
A “Carriage Return” character (ASCII 13 decimal {0D
hexadecimal}). This means the end of this message. This
is the character you get when you press “Return” or “Enter”
on your computer keyboard. Some computers also send
a “Linefeed” character (ASCII 10 decimal { 0A hex}). The
GSDA-CM-8
will ignore linefeeds sent to it, and it will not send
linefeeds after <CR> on its outgoing messages.
Example:
“Set the speed of the GSDA-CM-8 addressed as “01” to 1000”:
SP01,1000
Remember, there must be a “carriage return” character at the end of the message.
