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Appendix C
RS-232 Protocol
RS-232 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 III’s front panel.
Examples:
1)
To select put the Dreadnaught III 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)
