Keithley 6485 - Event Registers

10-16 Status Structure Model 6485 Picoammeter Instruction Manual
The commands to read the condition registers are listed in Table 10-4. For details on read-
ing registers, see “Reading registers,” page 10-6.
Event registers
As Figure 10-1 shows, each status register set has an event register. When an event occurs,
the appropriate event register bit sets to 1. The bit remains latched to 1 until the register is
reset. Reading an event register clears the bits of that register. *CLS resets all four event
registers.
The commands to read the event registers are listed in Table 10-5. For details on reading
registers, see “Reading registers,” page 10-6.
Table 10-4
Common and SCPI commands — condition registers
Command Description
STATus
:OPERation:CONDition?
:MEASurement:CONDition?
:QUEStionable:CONDition?
STATus subsystem:
Read operation condition register.
Read measurement condition register.
Read questionable condition register.
Table 10-5
Common and SCPI commands — event registers
Command Description
*ESR?
STATus
:OPERation:[:EVENt]?
:MEASurement:[:EVENt]?
:QUEStionable:[:EVENt]?
Read standard event status register.
STATus subsystem:
Read operation event register.
Read measurement event register.
Read questionable event register.
Note: Power-up and *CLS resets all bits of all event registers to 0. STATus:PRESet has no
effect.