Rockwell Automation DAG6.5.8 APPLICATION GUIDE SCADA SYSTEM - Manual (Page 97)

Publication AG-UM008C-EN-P - February 2005
Configuring MicroLogix 1100/1200/1500 Controllers 3-29
RTS On Delay
0 Defines the amount of time, in 20 millisecond increments, that
elapses between the assertion of the RTS signal and the beginning of
the message transmission. This time allows the modem to prepare to
transmit the message. The Clear-to-Send (CTS) signal must be high
for transmission to occur. See page 3-11 for further guidelines for
setting this parameter.
DCD Wait Delay
(1) 1 Only used with Half-Duplex Modem with DCD Handshaking Control
Line setting. Defines how long, in seconds, the processor will wait
for DCD to go low so that it can transmit, before giving up and
erroring out MSG.
Pre-Transmit Delay 0 Defines the amount of time, in 1 millisecond increments, that elapses
between when the processor has a message to send and when it
asserts the RTS signal (if handshaking is selected) or begins
transmitting (if no handshaking is selected).
(1) MicroLogix 1500 LRP Channel 1 only.
Table 3.7 Define these communication parameters when configuring a MicroLogix 1100/1200/1500
controller for DF1 Radio Modem communication.
Parameter Default Selections