Product Manual

7526A
Users Manual
5-6
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76543210
76543210
76543210
Service Request
Generation
SRQ
on
IEEE bus
Logical OR
Logical OR
Event Status
Register
Read using *ESR?
Read using ERR?
Read using *STB?
Event Status
EnableRegister
Service Request
Enable Register
Read using *SRE?
Write using *SRE
Read using *ESE?
Write using *ESE
Error
Available?
Data
Available?
Output Buffer
Error Queue
Read by Serial Poll
Status Byte Register
RQS
MAV
ESB
EAV
MSS
00006
PON
0
CME
EXE DDE
QYE
0
OPC
gwp033.eps
Figure 5-3. IEEE-488 (GPIB) Remote Connection
Change Between Local and Remote Operation
With local mode (front-panel operation) and remote, the Product can be put into a local
lockout condition by command of the controller. Mixed, the local, remote, and lockout
conditions will give you four possible operation conditions as follows.
1. Local State
The Product answers to local and remote commands. This is usual front-panel
operation. All remote commands received by the Product are processed.
2. Local with Lockout State
Local with lockout is the same to local, but the Product will go into the remote with
lockout state as an alternative to the remote state when it receives a remote command.
You can only go to this state with the IEEE-488 command GTL (Go To Local) when
in the remote with lockout state.
3. Remote State
When the Product is put in remote, by RS-232 REMOTE command, or by IEEE-488
asserting the REN line, it goes to the remote state. The left-end of the top-line of the
display changes to: rem.
Front-panel operation is stopped. This does not include the LOCAL (0) key. Push the
LOCAL key, use RS-232 to send the LOCAL command, or use IEEE-488 to send the
GTL (Go To Local) message. The Product goes to the local state.
4. Remote with Lockout State
When the Product is in lockout, by RS-232 LOCKOUT command, or by IEEE-488
message LLO (Local Lockout), the Product front-panel controls are locked out. The
left-end of the top-line of the display changes to: rem.
To change the Product to the local with lockout state, send the RS-232 LOCAL
command or the IEEE-488 GTL (Go To Local) message.