External Rs-232 Com Port - THORLABS TIBERIUS User Manual

®
Tiberius Tunable Femtosecond Ti:Sapphire Laser
5.5.

External RS-232 COM Port

The Tiberius can be controlled by an external device (e.g. a PC) via an RS-232 connection through the port on
the rear of the Tiberius Controller, as shown in Section 4.1.
Baud Rate
Data Bits
Stop Bits
Parity
Flow Control
Communication with the Tiberius involves two types of instructions:

Commands, which set the values of laser operating parameters.

Queries, which request the laser to return the values of operating parameters.
Any instruction to the laser consists of a command or query written as a string of ASCII charaters and terminated
by a carriage return and linefeed (<CR><LF>).
For example:
LASER=1<CR><LF>
enables emission. And,
VW?<CR><LF>
requests the Tiberius to return the target wavelength.
The Tiberius responds to every instruction either with a message terminated by a carriage return and linefeed
(<CR><LF>) or with just a carriage return and linefeed (i.e. a blank message). For proper handshaking,
communication programs should wait until <CR><LF> has been returned before sending another instruction.
The Tiberius responds to invalid commands with the message
CMD ERR 100<CR><LF>
and to invalid queries with the message
QUERY ERR 105<CR><LF>
If an invalid parameter is sent with a command, the Tiberius responds with the message
CMD ERR #<CR><LF>
or
RANGE ERR #<CR><LF>
depending on the command and the nature of the invalid parameter, where # is an internal integer error code of
arbitrary length.
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RS-232 Communication Settings
Chapter 5: Setup and Operation
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