Manual # 26-0002901-00 / Revision H ScreenPro - High Resolution Seamless Switcher
34
Serial Command Syntax Specification
Serial Parameters
The following are the parameter settings for serial communication.
Baud Rate is 38.4.
Parity is NONE.
Stop Bit is 1.
Data Bit is 8.
Echo is ON or OFF. (Applies to RS232 mode only)
For RS-232/485 signal connections, refer to Chapter 2 – Installation.
Protocol Mode Selection
:
The ScreenPro
TM
will be able to support RS232 or RS485 serial protocols. This mode will be selectable by the serial
command “SMODE” or via the SERIAL MODE menu item in the MISC Menu. When RS485 mode is selected an
additional parameter will be available to set the device address. This number will be in the range of 1 to 32. This
address ID will remain unchanged between system power cycles. The ID will default to 1 under the following
conditions:
•
A reset RS Ports is executed during a Factory System Reset.
•
A software upgrade is installed
.
RS232 Mode
The Graphics Board will respond with a '#' prompt when the command processor is ready for a command.
The command syntax is shown below
cmd arg1 arg2 … argn<CR>
cmd
cmd is any valid Graphics Board command, typically 2 to 6 alphabetic (non numeric) characters.
arg
arg1, arg2, … argn are required or optional parameters depending on the command used.
<CR>
carriage return (ASCII 13) terminates the command
A space (ASCII 32) must be inserted between the command and any arguments that follow. A space must also be
inserted between all argument parameters except for the last argument in the chain.
All commands in RS232 mode
must
be terminated with a carriage return (ASCII 13). The carriage return will tell the
command processor to begin execution of the command.
If the command is not recognized as a valid command, a '? 4' is returned for unknown command where ‘4’ is a
numeric error code for Command Not Available. If the command is recognized but the syntax is incomplete or
required parameters are missing then '? 1' will be returned, where ‘1’ is a numeric error code for Command Format
Error. See below for a complete description of Error Codes.
Query commands will return the following:
=result
#
The '=' indicates a result from a command is following. The 'result' will follow directly after the '='. The value of the
result will vary depending on the query command used. A new line will be generated and the prompt will indicate the
system is ready for a new command.
Error Codes
Command Format Error
1
Command Range Error
2
Command Execution Error
3
Command Not Available
4
