QT-B series controllers are equipped with a downloaded-data automatic operation function, and the Microsoft Windows compatible specialized QT-EDIT program editor software is included as standard.
Program (operation pattern) data created by QT-EDIT is able to be downloaded (written) to the controller. This allows stand-alone controller automatic operation, even after disconnecting from the PC.

Programs can be created with QT-EDIT by simply pasting command icons which means that no special programming knowledge is required.
QT-A series controllers can handle up to a 200 lines of code for each channel (100 lines for the QT-BDL1), and can store up to 15 program channels.

Programs can be executed using any one of the three methods; execution from the controlling device (QT-AK, QT-AK3), execution from QT-EDIT, or by turning the I/O program start/stop input to ON.
Program channel selection is carried out according to the combination of I/O program channel selection input (CH1 to CH4 terminals) signals.

After the program channel has been selected, the program will start as soon as the program start input is in the ON state.
After the program has started, if this input is changed to OFF before all of the described instructions are completed, the program can be interrupted during operation.
(After the program has been interrupted by switching to OFF, even if it is switched back to ON, a restart is not possible from the same position as when it was interrupted.)
By monitoring this type of program start input/output, it is possible to fully understand program execution and stoppage.