While communicate to a HP8720 device using NI-visa Interactive control 2.6, and using viGpibControlREN to set the device to REMOTE, the front panel 'local' key was disabled. It seems that the device is in a local lockout state. I used the mode 'VI_GPIB_REN_ASSERT_ADDRESS', and it sends the following gpib command across the IEEE bus, LLO 11, and UNL 3F. I then tried to press the 'LOCAL' button from the front panel and it didn;t responsed. I then remove the IEEE cable, and the front panel responsed.
Is there something wrong with the VI_GPIB_REN_ASSERT_ADDRESS mode?
Anybody encountered the same problem?