ProSoft Technology PTQ-AFC - Manual (Page 134)

Module Configuration PTQ-AFC ♦ Modicon Quantum Platform
User Manual Liquid and Gas Flow Computer for Hydrocarbon Products
Page 134 of 259 ProSoft Technology, Inc.
June 23, 2011
RS-232: Modem Connection (Hardware Handshaking Required)
This type of connection is required between the module and a modem or other
communication device.
The "Use CTS Line" parameter for the port configuration should be set to 'Y' for
most modem applications.
RS-232: Null Modem Connection (Hardware Handshaking)
This type of connection is used when the device connected to the module
requires hardware handshaking (control and monitoring of modem signal lines).