Rockwell Automation 5720 DriveLogix System - Manual (Page 203)

Publication 20D-UM002C-EN-P - November 2003
Communicating with Devices on a Serial Link 9-9
Example 2: Workstation
Remotely Connected to a
DriveLogix Controller In the following example, a workstation remotely connects to a DriveLogix
controller over s serial link. A modem is connected to the controller to provide
remote access.
If you use a modem to remotely connect the controller to one workstation, use
RSLogix 5000 programming software to configure the serial port of the
controller for the DF1 point-to-point (full-duplex) protocol, as in the previous
example. If the controller is part of a master/slave serial network, configure
Embedded response Specifies how to enable embedded responses.
Select Autodetect (enabled only after receiving one embedded response) or Enabled. The
default is Autodetect.
Error detection Select BCC or CRC error detection.
Configure both stations to use the same type of error checking.
BCC: the controller sends and accepts messages that end with a BCC byte for error
checking. BCC is quicker and easier to implement in a computer driver. This is the default.
CRC: the controller sends and accepts messages with a 2-byte CRC for error checking. CRC
is a more complete method.
Enable duplicate
detection Select whether or not the controller should detect duplicate messages. The default is
duplicate detection enabled.
This field: Description:
Preface
modem
modem