RS-232 COMMUNICATIONS
General Infor mation
Baud rate: 9600 (fixed)
Bits: 8
No Parity
All protocol in ASCII format
RS-232 input connector pin numbers: TxD= Pin# 2
RxD= Pin# 3
GnD= Pin# 5
Command format (single command): command value (i.e. brightness 30).
NOTE: A space (not an underscore) must be used between the command and its value.
All Commands must be followed by a carriage return.
Command string format: command,command value, command etc.
(i.e. COMPOSITE,BRIGHTNESS 30,ANAMORPHIC)
NOTE: In between commands, a comma or space can be used; a space must be used in
between a command and its value. All commands must be followed by a carriage return.
Other notes:
· All Commands must be followed by a carriage return.
·For command strings, a maximum of 255 characters can be used in a single string.
·If it is necessary to input multiple commands, they should all be together in a single string.
Inputting commands one at a time requires an arbitrary delay between commands while the
commands are being executed. Therefore, programming requires delays and is more difficult.
·For values not automatically stored (see next paragraph), the command "!STORE" must be
sent in order for the VHD Ultra Controller to keep the settings. Otherwise, the values will be
considered temporary and will revert to their stored settings upon source change or power-up.
·The "Value stored" column refers to a command that is either automatically stored or if it must
be manually stored with the "!STORE" command.
·PARAMETER min/max refers to a function's minimum and maximum value range. Inputting
values above or below their range may cause unpredictable (but not fatal) results.
· After each command is entered, the Controller returns the “>” symbol as a prompt
(ASCII code Ox). Use this symbol as an acknowledgement if your control system requires it.