MagTek MAGTEK - Manual (Page 64)

MagTek Communications Protocol, Driver Reference Manual
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try to synchronize to new communication parameters until it is reset or power cycled. Therefore,
if a device has been synchronized to a hosts communication parameters and the device is to be
resynchronized using different communication parameters then the device should be reset or
power cycled before trying to open the device with McpOpen. For example, if a serial port
device has synchronized to a device instance with the baud rate property set to 9600 and the host
now desires to Use McpOpen to synchronize the device to a device instance with the baud rate
property set to 19200, then the device will have to be reset or power cycled first or else the
McpOpen function will fail.