Q1: Is GU01/GU02 Module a GPIB Controller?
A1: No. GU01 or GU02 GPIB to UART Module is a GPIB device interface module, not a controller module. It can be listener and talker, not controller
Q2: Can it be set to address from 0 to 30?
A2: Yes. The module GPIB address can be set from 0 ~ 30.