GlobalQuestion
What is the difference between free run and handshake operation?
Answer
Free Run
"Free Run" means free-flowing transmission and only SD and RD signals are used.
(Free running is often used for communications between personal computers or Programmable Controllers and devices.)
Handshake
Handshaking refers to the control of transmissions between send/receive devices, e.g., stopping/starting communications during data transmission. (Also called "flow control").
For example, if, during data communications using a modem, the data transmission from the modem to the personal computer system is too fast and the system cannot keep up, the personal computer system must notify the modem to temporarily stop data transmission.
In this way the volume of data is adjusted (suppressed) when sending and receiving data between two nodes by reducing the data transmission speed or stopping transmission to suit mainly the receiving side, e.g., when the reception buffer is full or the processing of received data is not finished in time.
Applicable Model: Z3R Optical RS-232C Link Module
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