Rs232 Protocol; Command Structure - Planar RPS User Manual

RS232 Protocol

Command Structure

Planar RPS and Video Controller RS232 User Guide
020-1332-00I
[OPCODE](MODIFIERS)[OPERATOR][OPERANDS][TERM]
• OPCODE is the command code (e.g. "IR.CODE"). This can be written either using
the named command code (see the "Command Code" column in the table) or
the numeric command code (see the "Numeric Command Code" column in the
table).
• MODIFIERS are modifier values [e.g. "(STATIC)"]. There are zero or more
modifiers for each command. The modifiers can be written either with their
named value or their numeric value (see "Examples" on page 9). See the
"Modifiers" column in the table.
• OPERATOR is the action to be performed. See the "Operators" column in the
table.
• '=' writes the setting value.
• '?' reads the setting value in name form (see "Examples" on page 9).
• '#' reads the setting value in numeric form (see "Examples" on page 9).
• '+' increments the setting value.
• '-' decrements the setting value.
• ':' indicates that the message is a response to one of the following operators:
=?#+-
• '!ERR' indicates that the message is a failure response. An error code will be
listed after the "ERR", with a space before it. Error codes are as follows:
• ERR 1: Invalid syntax
• ERR 2: [Reserved for future use]
• ERR 3: Command not recognized
• ERR 4: Invalid modifier
• ERR 5: Invalid operands
• ERR 6: Invalid operator
• '@ACK' indicates that the message is an acknowledgment (ACK) to a
command that has no operator.
• '^NAK' indicates that the message is a negative acknowledgment (NAK) to a
command. This indicates that the command was received but cannot be
processed at this time.
• TIMEOUT indicates that a command was not received by a host piece of
equipment. This may be due to disconnected equipment or a poor
communication path.
• [No operator] denotes an action. In this case, there's no operator and no
operand.
RS232 Protocol
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