Software Control
1. Application Software Operation
The FW102C(NEB) and FW212C(NEB) come with a CD-ROM that contains application software to control the unit using USB 2.0, or RS232, from a PC. (See Thorlabs Motorized Filter Wheel Software Manual).
Minimum PC Requirements
The application program requires a minimum of a Pentium-class machine running Windows XP or newer.
Command Line Interface
The FW102C can also be controlled by a command line language through the USB or RS232 ports. This is offered to enable operation through a terminal interface or for those who may want to write their own program to control the wheel. Prior to running the command line interface, the unit should be powered, and a USB or RS232 cable should be connected between the FW102C and the host. The terminal emulator should be configured as follows:
Parameter      Setting
Baud Rate      115.2 K Bits per Second
Data Bits        8
Parity             None
Stop Bits        1
Flow Control   None

If the connection is correct, you will see the following message after pushing the Enter key:
2. Command error CMD_NOT_DEFINED
This message will be followed immediately by the prompt:
>
The basic structure of the interface is a keyword followed by either an equals sign “=” or a question mark “?”. The“=” or “?” will determine if the string is a command or a query. All strings (commands and queries) must be terminated by a carriage return (CR) or pressing the ENTER key on the computer.
2.1. Command Structure
Keyword = argument (CR)
Here, keyword defines the function, and argument is a numerical value followed y a carriage return (CR).
2.2. Query Structure
Keyword? (CR)
Keyword defines the function, and the question mark (?) indicates a query. The string is terminated with a carriage
return (CR). Exceptions to this and unique shortcut keys are given in the table on page 11.
The prompt symbol “>” will appear on power-up and after a command is accepted by the FW102C and indicatesthat the FW102C is ready to receive another command line.
2.3. Keywords (Commands and Queries)
The following table describes all of the available commands and queries:

Command              Syntax               Description
Get ID                   *idn?                  Returns the model number and firmware version
Set Position            pos=n                moves the wheel to filter position n
Get Position            pos?                   Position Query
Set Position Count   pcount=n           Sets the wheel type where n is 6 or 12
Get Position Count   pcount?              Returns the wheel type
Set Trigger Mode     trig=0                Sets the external trigger to the input mode
~                            trig=1                Sets the external trigger to the output mode
Get Trigger Mode     Trig?                  Returns the trigger mode
Set Speed Mode        speed=0           Sets the move profile to slow speed
~                             speed=1            Sets the move profile to high speed
Get Speed Mode        speed?             Returns the move profile mode
Set Sensor Mode       sensors=0        Sensors turn off when wheel is idle to eliminate stray light
~                             sensors=1        Sensors remain active
Get Sensor Mode       sensors?           Returns the sensor mode
Set Baud Rate           baud=0            Sets the baud rate to 9600
~                              baud=1           Sets the baud rate to 115200
Get Baud Rate           baud?              Returns the baud rate where 0 = 9600 and 1 =115200
Save Settings            save                 This will save all the settings as default on power up

"All commands and queries are in lower case letters.
If the keyword, format, or argument are incorrect or out of range, the unit will return an errorstring.
In addition to the commands given above, there is also special functionality added to thearrow keys of the computer’s keyboard:
Key                     Description
Up Arrow             Increments the filter position by 1
Down Arrow         Decrements the filter position by 1
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