Topic: DMD0264
Controller Mode Switch
The Mode switch on the front of the controller is used to manually set the operational mode of the controller. The Mode switch is located in the top right corner of the front bezel, just above the USB port.
The mode switch has the following three positions:
RUN - put the controller into RUN mode - assuming there are no issues that prevent it from happening, like errors in the project currently loaded in the controller, or a problem with the hardware.
TERM - (Terminal) - placing the switch in this mode allows the Do-more Designer programming software to set the controller's mode using the Set PLC Mode utility.
STOP - put the controller into Stop (Program) mode which stops running the currently loaded project
How the Mode Switch Affects Power-Up State
When power is applied to the system, the controller will go through it's power-up sequence then either stay in Program mode if the mode switch is in the STOP position, or attempt to go to Run mode if the mode switch is in the RUN position.
If the mode switch is in the TERM position, the controller will return to the last operational mode before power was lost. For example, if the controller was in Run mode when power was lost, when power is restored and the mode switch is in the TERM position, the controller will attempt to return to Run mode.
See the Current Mode Switch Position in Do-more Designer
The current position of the mode switch can be seen in the Do-more Designer programming software in the Current PLC Settings group of the Set PLC Mode dialog.
It can also been seen on the status bar.
The status bar group shows the three mode position options, with the current position in Blue, This is the image that will be displayed when the mode position is in the TERM position:
See Also:
Mode Switch Position Definitions