Product manual

PX Range Product Manual Version 2.3 © Copyright Brainboxes Limited 2013 Page 22 of 45
• All options can be selected from the Dropdown Menus. In addition, you can enter a non-standard
value into the Baud rate
NB – Once the desired settings have been achieved, you must click OK to activate them. At anytime click
the ‘Restore Default’ button to return to the original setup.
Default / Override Settings
• The “Default Settings” will be set if an application does not specify the serial settings when it opens
the COM Port.
o This is sometimes the case with old Legacy applications and you will need to choose these
settings to match the communications that you wish to use.
o The majority of Applications will specify what Serial Settings they wish to use. In this case, it
will not matter what the Default settings are, as the Port will be opened with the Application’s
Settings.
• When the ‘Override’ box is checked next to the Default Setting, the Port will communicate at this
setting whether an application has requested it or not.
o For example, this will enable you to force baud rates that your application does not allow you
to select. This can be useful for interfacing to equipment which uses higher baud rates or
unusual baud rates, which your application does not support.
o In a case where you want to use hardware handshaking, but your application is not capable,
you can select RTS / CTS Always True – Hardware state ignored and choose to Override it.
o NB with the use of Override Settings, you need to ensure that the equipment you are
connecting to is setup to match the communications settings you are forcing.
CTS / DSR Always True
• CTS and DSR are incoming hardware handshaking lines. This means they receive signals from the
connected device which tell the ExpressCard when it is and isn’t OK to send data.
o Sometimes these signals may want to be ignored. By forcing CTS or DSR True, the
ExpressCard will ignore those signals and always send data.