Programming instructions
 21
General Programming Aspects
Status Model
Enable Register
The enable register defines which bits in an event register are included in 
the logical OR into the summary bit. The enable register is logically 
ANDed with the event register and the resulting bits ORed into the 
summary bit. Enable registers are read/write, and are not affected by 
*CLS or querying.
Although all status groups have all of these registers, not all status 
groups actually use all of the registers. The following table summarizes 
the registers used in the instrument status groups.
1 Present, but not used. COND and EVEN always 0.
2 Use 
*ESR?
 to query. 
3 Use 
*ESE
 to set, 
*ESE?
 to query
4 Use 
*STB?
 to query
5 Use 
*SRE
 to set, 
*SRE?
 to query
Status Group
Registers in Group
CONDition NTR PTR EVENt ENABLe
QUEStionable
√√√√√
OPERation
1
xxxxx
Standard Event Status xxx
√
2
√
3
Status Byte xxx
√
4
√
5










