you can use the EV100 handset to change the values in this controller as long as you have the correct cord that connects directly to the controller box plug.
Also can use the pc laptop and the ge sentry program as long as you have the correct cable. Or you can get the GE cable for laptop and connect directly to the controller.
On the Yale trucks i'm pretty sure there is a serial db9 port under the display unit but you need the yale software to access the system from that port.