Rockwell Automation 160 DEVICENET (DN1) MODULE FRN 1-2.XX - Manual (Page 20)

Publication 0160-5.5 - September 1997
Installation and Wiring 3-5
Setting the Baud Rate Dip switches 7 and 8 set the baud rate at which the Communication
Module communicates on the network. The factory default setting for
baud rate is 125K BPS.
Figure 3.4
Setting the Baud Rate
Follow these steps to set the DeviceNet Baud Rate:
1. Refer to Table 2 for the switch setting of a specific Baud Rate.
2. Slide switches 7 and 8 to the appropriate positions using your fin-
ger or a pointed object.
Important: When switches 7 and 8 are ON, the DeviceNet Baud Rate
is set to the value in parameter P19 - [Nonvolatile Baud].
Cable Lengths and Baud Rates
The baud rate determines the maximum length of the DeviceNet
cable. Refer to Table 3 to determine cable lengths and baud rates.
ON = 1
OFF = 0
Use DIP Switch 8 and 7 for
setting the DeviceNet Baud
Rate.
1 2 3 4 5 6 7 8
O N
Table 2: Switch Settings for DeviceNet Module Baud Rate
Baud Rate
Switch Setting
8
Switch Setting
7
125 kBPS 0 0
250 kBPS 0 1
500 kBPS 1 0
Set by DeviceNet
Parameter 19
1 1
Table 3: Baud Rate vs. Cable Length
Baud Rate
Maximum Cable Length
(Trunk Line)
125 kBPS 500 meters (1640 feet)
250 kBPS 250 meters (820 feet)
500 kBPS 100 meters (328 feet)