PAS series that equips the TP-BUS interface can be digitally controlled by a PC through PIA4850.
PIA4850 is a power supply controller with the USB interface to control Kikusui DC power supply with TP-BUS.
Inside of PAS series, the TP-BUS signals pass through the CPU and they are converted to the analog signals by the D/A convertor.
The response time of the external control through the USB interface may be approx. 100 milliseconds (It depends on the variation of the D/A convertors.)