E2730A VXI RF TUNER
3-16
OPERATION
The ESB bit indicates an enabled event in the Event Status Register
(*ESR) occurred. The *ESR contains bits to indicate Operation Complete
(OPC), Query Error (QYE), Device Dependent Error (DDE), Execution
Error (EXE), Command Error (CME) and Power On (PON). The Event
Status Enable Register (*ESE) contains a corresponding enable bit for
each event. The OPC event is set upon completion of the parsing of a
command string which includes the *OPC command. A QYE event is
generated when previously queried data is discarded without having been
read. The DDE event occurs when the tuner detects a failure of one or
more of the monitored hardware subsystems and the enable DDE bit in the
*ESR is set. Reading the DDE register will indicate the cause for the
failure event. The EXE bit is set to indicate that the tuner has received a
valid command with an out-of-bounds argument. The CME bit indicates
the tuner has received an unknown or invalid command mnemonic. The
PON bit is set whenever the unit power is cycled. Anytime the control
software restarts, the PON bit will be set.
The mnemonics associated with this message category are listed in
Table 3-10
.
Table 3-10. Communications Messages and SRQ Operations
Command
Response
Description
*CLS
Clear all communication status registers.
*ESE nrf
Set up the Event Status Enable Register.
Bit definitions are same as Error Status Register
(*ESR).
*ESE?
*ESE nr1
Read the current value of the Event Status Enable
Register.
Reset: n/c
Example: *ESE 000
*ESR?
*ESR nr1
Return the current setting of the Event Status
Register.
Bit Description
0 OPC operation
1 Not Used
2 QYE (query error)
3 DDE (device-dependent error)
4 EXE (execution error)
5 CME (command error)
6 Not Used
7 PON (power on)
Reset: n/c
Example: *ESR 128
Summary of Contents for E2730A
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