Initialize Com port 1 in Vision & Samba PLC + HMI Controllers & VisiLogic Software Posted September 29, 2011 · Report reply Try using a baud rate of 9600. This poster is correct. As of recent, Vision controller operating systems now mandate the use of 9600 baud rate for the Enfora modem. It used to be the case that any speed would work, and actually 57,600 was the most common to use. This is no longer true, and you must re-prepare the PLC side modem for a 9600 baud rate as well as have this set in the COM Init function block.