Keithley 2303, User Manual

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7-12 Status Structure
Operation event status
The used bits of the operation event register (shown in Figure 7-5) are described as follows:
• Bit B3, current limit (CL) — Set bit indicates that the output is in current limit. This
bit clears when the instrument is no longer in current limit.
• Bit B4, current limit tripped (CLT) — Set bit indicates that the output has turned off
due to a current limit condition. This bit clears when the output is turned back on.
• Bit B6, power supply shutdown (PSS) — This bit indicates that the output has turned
off due to an overload and/or overheat condition. This typically indicates that the user
tried to exceed the power output capability of the unit.
___
PSS
___
CLT CL
___
(B15-B7) (B6) (B5) (B4) (B3) (B2-B0)
OR
&
&
&
:CONDition?
[:EVENt]?
To OPC bit
of Status Byte
Register
:ENABle <NRf>
:ENABle?
Decimal Weights
Operation Condition
Register
Operation Event
Register
PSS = Power Supply Shutdown
CLT = Current Limit Tripped & = Logical AND
OR = Logical OR
___
PSS
___
CLT
CL
___
(B15-B7) (B6) (B5) (B4) (B3) (B2-B0)
___
PSS
___
CLT CL
___
(B15-B7) (B6) (B5) (B4) (B3) (B2-B0)
___
64
___
16 8
___
(2
6
) (2
4
) (2
3
)
Operation Event
Enable Register
CL = Current Limit
Figure 7-5
Operation event status