Sigma LBA-400 Manual Do Utilizador

Commands to the LBA-PC will not normally generate a response back to the host controller, unless the 

command: 

•  Changes remote/local mode 
•  Is a query 
•  Initiates an operation that produces results 
•  Generates an error 

 

 

The LBA-PC in combination with an appropriate National Instruments GPIB board conforms to the 

IEEE 488.1 standard according to the following Subset Codes: 
 

 

SH1, AH1, T6, L4, SR1, RL2, PP0, DC1, DT0, E2, C0 

 

These Subset Codes are defined in the IEEE 488.1 standard and describe interface capabilities of the 
LBA-PC. 
The following multiple line interface message commands are supported by the LBA-PC: 

 

GTL 

- 

Go To Local (0x01).  When the LBA-PC detects the GTL message it returns 

to local command mode. 

 

LLO    - 

Local Lockout (0x11).  When the LBA-PC detects the LLO message it enters 

what is called the lockout state.  This is equivalent to entering the operator 
password in the Options | Password menu item.  While in the lockout state 

access is denied to many of the LBA-PC menu items.  When the LBA-PC 

exits the lockout state access to all menu items is restored. 

 

MLA 

- 

My Listen Address (0x20 to 0x3e). 

 

MSA 

- 

My Secondary Address (0x60 to 0x7e). 

 

MTA 

- 

My Talk Address (0x40 to 0x5e). 

 

PPC 

- 

Parallel Poll Configure (0x05).  Handled by GPIB board and NI-488.2M. 

 

PPD 

- 

Parallel Poll Disable (0x70 to 0x7e).  Handled by GPIB board and NI-

488.2M. 

 

PPE 

- 

Parallel Poll Disable (0x60 to 0x6e).  Handled by GPIB board and NI-

488.2M. 

 

PPU 

- 

Parallel Poll Unconfigure (0x15).  Handled by GPIB board and NI-488.2M. 

 

SPD 

- 

Serial Poll Disable (0x19). 

 

SPE 

- 

Serial Poll Enable (0x18). 

 UN 

- 

Unlisten 

(0x3f). 

 UNT 

- 

Untalk 

(0x5f). 

 

Operator’s Manual 

 

LBA-PC 

 

Doc. No. 10654-001, Rev 4.10 

179

The following IEEE 488.1 commands are not supported: