Rockwell Automation DAG6.5.8 APPLICATION GUIDE SCADA SYSTEM - Manual (Page 91)

Publication AG-UM008C-EN-P - February 2005
Configuring MicroLogix 1100/1200/1500 Controllers 3-23
Use Worksheet 3.3 MicroLogix 1100/1200/1500 DF1 Half-Duplex Slave
Station Configuration (pageD-11) for an example configuration and to
record your station’s configuration.
Define these parameters when configuring a MicroLogix
1100/1200/1500 controller as a slave station.
2. On the Channel tab, choose
DF1 Half-Duplex Slave for
your Driver.
3. Configure the communication
driver characteristics
according to Table 3.5.
Table 3.5 Configuring a MicroLogix 1100/1200/1500 controller as a Slave Station
Parameter Selections
Baud Rate Select a communication rate that all devices in your system support. Configure all
devices in the system for the same communication rate.
Parity Parity provides additional message packet error detection. To implement even parity
checking, choose Even. To implement no parity checking, choose None.
Node Address A node address identifies the controller on the DF1 half-duplex link. Each station on a
link must have a unique node address. Choose an address between 0
10
and 254
10.
Node
address 255
10
is the broadcast address, which you cannot select as a station’s
individual address.
Control Line This parameter defines the mode in which the driver operates. Choose a method
appropriate for your system’s configuration:
•
If you are not using a modem, choose NO HANDSHAKING.
•
If the master modem is full duplex and the slave modem is half-duplex, choose
HALF-DUPLEX MODEM (RTS/CTS Handshaking).
See page 3-8 for descriptions of the control line operation settings.
Error Detection With this selection, you choose how the controller checks the accuracy of each DF1
packet transmission.
BCC: This algorithm provides a medium level of data security. It cannot detect:
•
transposition of bytes during transmission of a packet
•
the insertion or deletion of data values of zero within a packet
CRC: This algorithm provides a higher level of data security.
Select an error detection method that all devices in your configuration can use.
When possible, choose CRC.