Reference Multimeter and 8 ½ Digit Multimeter
SCPI Commands Reference
47
IEEE 488.2 Registers
Table 8. Status Byte Register
Bit No.
Bit Value
IEEE 488.2 Meaning
8588A Meaning
0
1
Device dependent
Not used
1
2
Device dependent
Not used
2
4
Device dependent
Error/event queue not empty
3
8
QUES
QUESTionable summary bit
4
16
MAV
Message Available bit
5
32
ESB
Event status summary Bit
6
64
RQS|MSS
Request for service bit, or Master Status
Summary bit
7
128
OPER
OPERation summary bit
Table 9. Standard Event Status Byte Register
Bit No.
Bit Value
IEEE 488.2 Meaning
8588A Meaning
0
1
Operation Complete
Set true if all operations pending from a *OPC
command are complete
1
2
Request Control
Not used, always set false
2
4
Query Error
Set true if the controller has followed an
inappropriate message exchange protocol
3
8
Device Dependent Error
Set true when an internal operating error has
occurred
4
16
Execution Error
Set true if a received command cannot be
executed or paramers are out of bounds
5
32
Command Error
Set true if a command with incorrect syntax is
received
6
64
User Request
Not used, always set false
7
128
Power On
Set true when power is applied
Each bit of the OPERational and QUEStionable registers have sub registers as
shown in Figure 4.
subregisters.jpg
Figure 4. Sub Registers
