Appendix Crs232 Protocol - Theta Digital Enterprise Owner's Manual

Appendix C RS232 Protocol
RS232 settings are internally definable via jumper blocks, to accommodate interfacing with a wide range of control
products.
Baud rate 96ØØ or 192ØØ
Echo status AUTO or REQUEST
Select C
Select D
Select E
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.
Select C,D & E: The three SELECT jumpers are used to set the unit ID. There are possible 8 configurations, listed in
the chart on page 13.
All commands will follow the format:
<Header><Command Identifier><Argument 1><Argument 2><Argument 3>
where:
<Header> = <FEh><DØh> **
<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 Enterprise's front panel.
Example:
1) To put the [Front Left] Enterprise into standby: Send FE, DØh **, Ø1, ØØ, ØØ, ØØ (all values in Hex).
Where FE and DØh ** are the header, Ø1 = standby command, ØØ = put into standby, ØØ = filler and ØØ =
filler (4 characters required).
HEX
DEXIMAL
** In this example the header ID is set to the Front Left Enterprise. Replace this data to match the ID of the Enterprise
to be controlled, if different.
Ø or 1
Ø or 1
Ø or 1
HEADER
FE DØ
254 2Ø8
COMMAND ARG 1
Ø1 ØØ
Ø1 ØØ
10
ARG 2 ARG 3
ØØ ØØ
ØØ ØØ