LT3000 Series / STC6000 Series
From the [Project] menu, point to [System Settings] and click [I/O Driver]. On the [Int.Driver 1] tab, click [Standard I/O Settings].
For the LT-3200 Series
For LT-3300 Series / STC6000 Series
The [Standard I/O Settings] dialog box appears. Define the [Retain Output] setting.
LT4000 Series
From the [Project] menu, point to [System Settings] and click [I/O Driver]. Specify the [Standard Output]. To retain output state, select [Save output value when logic stops].
When CH1 to CH4 are all set to [Standard], for inputs and outputs on the LT3000 series or STC6000 series you can select [Bit] or [Word] as the [Type]. On the LT4000 series, you cannot select [Word] as the output [Data Type].
When either the input or output [Type] is set to [Word], you cannot select Special I/O for CH1 to CH4. When setting Special I/O, set all [Type] to "Bit".
Be careful when changing [Type] while I/O is already allocated. I/O mapping may be removed, or errors may occur when saving or transferring.
31.5.3.3 Cautions When Changing Types