Communication Protocol; Special Purpose Commands - Roland M-200i Reference Manual

Overview of commands
The commands for Telnet remote controls are common with RS-232C commands except for the control codes (stx, ack).
Refer to "V-Mixer RS-232C Reference" for details of the commands.
The control codes of the RS-232C commands should be converted as follows.
Codes Hexadecimal Expression
stx 0x02
ack 0x06

Communication Protocol

Depending on the command, there are two types of communication protocols between the control computer and the
●
When specifying an operation or setting for the
This type corresponds to the "Control commands". These commands use the procedure shown in the following diagram.
fig.PrtConcept1.eps
COMPUTER
a. Transmit the command from the computer to the M-200i.
b. The M-200i will output "OK" if the command was received correctly, or an ERR command in case of invalid reception.
●
To learn the settings of the
This type corresponds to the "Request commands". Commands used to check the status of a setting in the
procedure.
fig.PrtConcept2.eps
COMPUTER
a. Transmit the command from the computer to the M-200i.
b. If the M-200i receives the command correctly, it will send back a command containing the information that was requested. If the
command was not received correctly, an ERR command will be sent back.
c. If the output of the

Special Purpose Commands

Followings are the special purpose commands to be transmitted from the computer to the M-200i.
Commands
Text "OK"
Text "QUIT"
• You can use capital letters or small letters.
6
Processing
Delete
Convert to the text "OK"
a. command
b. "OK" or ERR command
M-200i
a. command
b. command or ERR command
c. "OK" or ERR command
M-200i was received correctly, an "OK" will be sent back. (* This "OK" can be omitted.)
Processing
Send "ack" to the server
Terminate connection
M-200i
M-200i
M-200i
M-200i
M-200i use the following