Allen-Bradley SLC 500 Series Reference Manual page 396

13-66 SLC Communication Channels
Table 13.20 Define these parameters when configuring a SLC 5/03, 5/04, or 5/05 processor as a master station using
message-based polling mode to communicate with slave stations.
Tab Parameter
General Diagnostic File 0
Channel 0 Baud Rate
System
Parity
Stop Bits
Node Address 0
Control Line
Error
Detection
Publication 1747-RM001G-EN-P - November 2008
Default Selections
SLC 5/03 (OS 302, Series C or higher), SLC 5/04 (OS 401, Series C or higher) and SLC 5/05
only. Select an unused file (9-255) to store channel status information. You must define a
diagnostic file in order to be able to view channel 0 status. See Table 13.21 on page 13-68
for a file description.
1200 Select a communication rate that all devices in your system support. Configure all devices in
the system for the same communication rate.
None Parity provides additional message packet error detection. To implement even parity
checking, choose Even. To implement no parity checking, choose None.
1 Match the number of stop bits to the devices with which you are communicating.
A node address identifies the processor on the DF1 half-duplex link. Each station on a link
must have a unique address. Choose an address between 0
is the broadcast address, and cannot be selected as a station's individual address
No This parameter defines the mode in which the driver operates. Choose a method appropriate
Handshaking for your system's configuration.
• If you are not using a modem, choose NO HANDSHAKING.
• If the master modem is full duplex, choose FULL-DUPLEX.
• If all the modems in the system are half-duplex, choose HALF-DUPLEX WITHOUT
CONTINUOUS CARRIER.
See page 13-86 for descriptions of control line operation settings.
CRC With this selection, you choose the how the processor 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.
and 254 Node address255
10 10. 10