Sample Program For Modem Answer Mode - IDEC FC4A-C10R2 User Manual

Fc4a series microsmart micro programmable logic controller

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Sample Program for Modem Answer Mode

This program demonstrates a user program for the modem answer mode to move a value to a data register assigned to the

modem mode and initialize the modem. While the telephone line is connected, user communication instruction RXD2 is

executed to receive an incoming communication.

The RXD2 instruction is programmed using

Source S1: Data register D10, No conversion, 2 digits, Repeat 10

M8120 is the initialize pulse special internal relay.

starts to run, M8055 is turned on to send

the initialization string for the modem answer mode.

The MOV instruction stores 1 to D8103 to enable user protocol

after telephone line is connected.

M8077 (line connection status) is on while telephone line is con-

RXD2 receives incoming communication and stores received data

to data registers starting with D10.

with parameters shown below:

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