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Appendix C RS232 Protocol
RS232 settings are internally definable via jumper blocks, to accommodate interfacing with a wide range of control
products.
Baud rate 9600 or 19200
Echo status AUTO or REQUEST
Baud rate: Maximum number of bits per second. The duration of a single bit is equal to 1 / baud rate.
Echo status: Specifies whether the STATUS of each parameter shown in the protocol will automatically (AUTO) be
echoed back to the controller when there is any change, or whether the user must manually request
(REQ) the status information be sent to the controller. Please refer to page 15 or information on
changing these settings.
All commands will follow the format:
<Header><Command Identifier><Argument 1><Argument 2><Argument 3>
where:
<Header> = <FEh><E8h> (254 232)
<Command identifier> = <byte>
<Argument x> = <byte>
Each command will be able to access the system configuration directly, eliminating the need to press any button on
the Dreadnaught II’s front panel.
Examples:
1) To select put the Dreadnaught II into standby: Send FE, E8, 01, 00, 00, 00 (all values in Hex).
Where FE and E8 are the header, 01 = command, 00 = main standby, 00 = put unit in standby and 00 = filler
(4 characters required)
2) To activate the Surround buss: Send FE, E8, 01, 01, 01, 00
Where FE and E8 are the header, 01 = command, 01 = surround buss, 01 = activate surround buss and 00 =
filler (4 characters required)
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