Driver setup windows – Solvline USB Multiport User Manual
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Driver Setup
Windows
: The Event On Surprise Removal option is generally left unselected. If an application
sets SERIAL_EV_EVENT2 (refer Windows DDK) in it is event bitmask and this feature
is enabled, the device driver will signal this event on surprise removal.
Set RTS on Close: Selecting the Set RTS on Close option will set the RTS signal on
closing the port.
Disable Modem Control at Startup: This option is used to control the modem control
signals DTR and RTS at startup. In normal operation, the modem control signals at
startup follow the behavior of the legacy port. However, due to timing differences
between a legacy COM port and a virtual COM port, a "spike" on one of these signals
in the legacy port can appear as an assertion of the signal in the virtual COM port.
Devices that monitor these signals can enter the wrong state after an unplug-replug
cycle on USB. Note that if \ the "Serial Enumerator" option in the property page is
selected, then the enumeration sequence causes the modem control signals to change
at startup. So if it is necessary to select "Disable Modem Ctrl At Startup", then it is
likely that "Serial Enumerator" should be unchecked in the property page.
Don’t adjust these parameters if you can use the device normally. If not, please
contact us (
) about these parameters first.