Quantum Data 881 User Manual page 228

In the remote with lockout state (RWLS), the generator is under complete remote control
and front panel controls are disabled. The generator enters the RWLS state when the
controller issues the local lockout (LLO) message to the generator. Front panel access is
re-enabled when the controller issues the go to local (GTL) message to the generator.
In the local state (LOCS), the generator is under local control and all front panel controls
are enabled. Any remote messages received are stored for processing when the
generator enters the remote state again. The generator enters the remote state (REMS) if
the REN line is true and the generator is addressed to listen.
In the local with lockout state (LWLS), the generator is under local control, and all front
panel controls are enabled. Any remote messages received are stored for processing
when the generator enters the remote state again. The generator enters the remote with
lockout state (RWLS) if it is addressed to listen.
216 Chapter 6 Using GPIB Interface