Tektronix KEITHLEY 2200 Series, Programming Reference Manual

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Status and Events
Table 3-1: SBR bit functions (cont.)
Bit Function
2 EAV Shows that information is available in the Error Queue.
1
———— Not used.
0
———— Not used.
Each bit in an Enable Register corresponds to a bit in an Event Register. In order
for an event to be reported to a bit in the Status Byte Register, the corresponding
bit in the Enable Register must be set to one. If the bit in the Enable Register is set
to zero, the event will not affect the status bit.
Various commands set the bits in the Enable Registers. Following are descriptions
of the Enable Registers and the commands used to set them.
The Standard Event Register (SER).
The SER records six types of events that can
occur within the power supply as shown in the following fi gure.
Figure 3-3: The Standard Event Register (SER)
Table 3-2: SER bit functions
Bit Function
7
PON
Power On.
Shows that the power supply was powered
on.
6
———— This bit is not used.
5
CME
Command Error.
Shows that an error occurred while
the power supply was parsing a command or query.
4 EXE
Execution Error.
Shows that an error occurred while
the power supply was executing a command or query.
3 DDE
Device Error.
Shows that a device dependent error
occurred.
2 QYE
Query Error.
Either an attempt was made to read the
Output Queue when no data was present or pending, or that
data in the Output Queue was lost.
1
———— This bit is not used.
0 OPC
Operation Complete.
Shows that the operation
is complete. This bit is set when all pending operations
complete following an *OPC command.
The Operation Instrument Status Register (OISR).
The Operation Instrument Status
Register is made up of eight bits that note the occurrence of events as shown here.
3-4 Series 2200 Programmable Multichannel DC Power Supplies Programmer Manual