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3.2 Setting the Switches
3
3.2 Setting the Switches
The DN311 has DIP switches and rotary switches on the front panel. These switches are
used for setting its operation mode, communication rate, and node address.
3.2.1
DIP switches for operation mode/communication rate setting
Figure 3-2 DIP Switches for Operation Mode and Communication Rate Setting
(*1)Busoff: Individual DeviceNet nodes check one another for transmission line errors. If
the local node is judged to be the cause of frequent transmission line errors, it is
disconnected from the transmission line. This state is called busoff.
NA-H
NA-L
ON
OSEN
BUSOFF
DR1
DR0
For operation mode/communication
rate setting
Factory Default: All switches OFF
Table 3-1 DIP Switch Setting
DIP Switch Name
Function
1
OSEN
Reserved for the system. Keep it in the OFF position.
2
BUSOFF
To specify an operation mode when the DN311 falls into a busoff state (*1).
ON: Once it is in a busoff state, the DN311 initializes the internal network
controller to be in standby mode. After remedying the cause of the busoff,
resume transmission with an instruction from the S controller.
OFF: One it is in a busoff state, the DN311 initializes the internal network
controller and resumes transmission. (Default).
3
4
DR1
DR0
Set a communication rate. Refer to Table 3-2
Table 3-2 Communication Rate Setting
Communication Rate
DR1
DR0
125kbps
250kbps
500kbps
Setting now allowed
OFF
OFF
ON
ON
OFF
ON
OFF
ON
←
Factory Default