Up to 31 PLC units can be connected to one Panasonic GT05 unit. Progress in multiple production lines can be centrally monitored and controlled via one GT unit. Password protection and operation security functions protect the data asset in the display unit and control the authorization for operation. The screen data upload operation can be restricted by using passwords to protect the data asset in the display unit. Up to 64 operators can set individual passwords, and up to 16 levels of restrictions can be set on displays and operations for each part. The registered users and passwords can be changed on the display unit. This function allows operators to simultaneously carry out the transfer of screen data of a GT series display and the debugging of our FP series PLC connected to the display. Conventionally, screens were created for each language. With this new language switching function, data can be registered in multiple languages (up to 16) for each part. The characters can be easily edited with Microsoft Excel® and then imported. This function modifies the PLC data or turns bits on/off according to the PLC status or the screen No. Now four arithmetic operations between devices are also possible.