Connections and Wiring
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NI-2100, NI-3100, NI-4100 Hardware Reference Guide
Connections and Wiring
Setting the Configuration DIP Switch (for the Program Port)
Prior to installing the Controller, use the Configuration DIP switch to set the baud rate used by the Program
port for communication. The Configuration DIP switch is located on the front of the Integrated Controllers.
Baud Rate Settings
Before programming the on-board Master, make sure the baud rate you set matches the communication
parameters set on both your PC’s COM port and those set through your NetLinx Studio v 2.4.
By default, the baud rate is set to 38,400 (bps).
Program Run Disable (PRD) Mode
You can also use the Program port’s Configuration DIP switch to set the on-board Master to Program Run
Disable (PRD) mode according to the settings listed in the table below.
The PRD mode prevents the NetLinx program stored in the on-board Master from running when you power up
the Integrated Controller. This mode should only be used when you suspect the resident NetLinx program is
causing inadvertent communication and/or control problems.
If necessary, place the on-board Master in PRD mode and use the NetLinx Studio v 2.4 program to resolve the
communication and/or control problems with the resident NetLinx program. Then download the new NetLinx
program and try again.
Baud Rate Settings on the Configuration DIP Switch
Baud Rate Position 5 Position 6 Position 7 Position 8
9600 bps OFF ON OFF ON
38,400 bps (default) OFF ON ON ON
57,600 bps ON OFF OFF OFF
115,200 bps ON ON ON ON
Note the orientation of the Configuration DIP Switch and the ON position label.
DIP switches 2,3, and 4 must remain in the OFF position at all times.
PRD Mode Settings
PRD Mode Position 1
Normal mode (default) OFF
PRD Mode ON
Think of the PRD Mode (On) equating to a PC’s SAFE Mode setting. This mode
allows a user to continue powering a unit, update the firmware, and download a new
program while circumventing any problems with a currently downloaded program.
Power must be cycled to the unit after activating/deactivating this mode on the
Program Port DIP switch #1.
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