User`s manual

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CHAPTER 3 COMMUNICATIONS BY THE MODEM FUNCTION
3
3.1 Overview
(3) Communication between a remote external device and programmable
controller CPU
(a) Data communication can be performed via full-duplex communication.
(b) From the external device to the programmable controller CPU, communication
using the MC protocol, non procedure protocol and bidirectional protocol can be
performed.
(c) From the programmable controller CPU to the external device, communication
using the MC protocol (transmission by the on-demand dedicated-protocol function
only), the non procedure protocol and bidirectional protocol can be performed.