Changing Between Local And Remote Operation - Omega CL3001 User Manual

Figure 32 - IEEE-488 (GPIB) Remote Connection

9.4 Changing Between Local and Remote Operation

In addition to local mode (front panel operation) and remote, the
CL3001 can be placed into a local lockout condition at any time by
command of the controller. Combined, the local, remote, and
lockout conditions yield four possible operating states as follows.
a)
b)
c)
d)
44
Local State
The CL3001 responds to local and remote commands.
This is normal front panel operation. All remote
commands received by the CL3001 are processed.
Local with Lockout State
Local with lockout is identical to local, except that the
CL3001 will go into the remote with lockout state instead
of the remote state when it receives a remote command.
This state can only be entered by sending the IEEE-488
command GTL (Go To Local) when in the remote with
lockout state.
Remote State
When the CL3001 is placed in remote, either via a RS-232
REMOTE command, or via the IEEE-488 asserting the
REN line, it enters the remote state. The left end of the top
line of the display changes to: rem.
Front panel operation is disabled except for the LOCAL (0)
key. Pressing the LOCAL key, using RS-232 to send the
LOCAL command, or IEEE-488 to send the GTL (Go To
Local) message, returns the CL3001 to the local state.
Remote with Lockout State
When the CL3001 is placed in lockout, either via a RS-232
LOCKOUT command, or via the IEEE-488 message LLO
(Local Lockout), the CL3001 front panel controls are totally
locked out. The left end of the top line of the display
changes to: rem.