TDK-Lambda Genesys Series, User Manual

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2.8.11 READ QUESTIONABLE INSTRUMENT SUMMARY ‘EVENT’ REGISTER COMMAND
See Figure 6 and Section 2.9.8,
THE SUMMARY REGISTERS
. Read which supplies sent
an SRQ. These bits are set regardless of the value of the enable bit. When set they remain set
until read.
Syntax:
STATus:QUEStionable:INSTrument:ISUMmary1? or
STATus:QUEStionable:INSTrument:ISUMmary2? or
STATus:QUEStionable:INSTrument:ISUMmary3?
Example:
STAT:QUES:INST:ISUM1?
2.8.12 STATUS PRESET COMMAND
Presets all Operation Enable and Questionable Enable Registers.
Syntax:
STATus:PRESet
Example:
STATUS:PRESET
2.9 USING ERROR AND STATUS REGISTERS
2.9.1 OVERVIEW: REGISTER FAN-OUT
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pliant instruments.
These registers allow the IEEE controller to examine the operational state of the supply in detail.
A “fan-out” architecture is used so only one summary register needs to be read to know if an
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manage the remote programming mode.
A diagram of the register structure is shown in Figure 4 for Point-to-Point Mode and in Figure 5
and Figure 6 for Multi Drop Mode.
2.9.2 GLOSSARY OF REGISTER TERMS
ƒ SERVICE REQUEST: When an instrument on the IEEE bus asserts the SRQ line
in the cable, it tells the controller that it has completed its task or that an error has
occurred.
ƒ
SERIAL POLL: An IEEE function which reads back the data in an instrument’s
Status Byte Register. The controller should perform this function after every com-
mand to verify the command was successful.
ƒ REGISTER QUERIES: Read the contents of registers. The contents are returned
as a binary weighted decimal number.
ƒ CONDITIONAL REGISTERS. These contain bits that are set when a condition or
error occurs. The bits are only cleared when the condition or error is cleared. The
contents may be read but not changed.
ƒ ENABLE REGISTERS: The various Enable Registers can be set to allow the sta-
tus and errors to be detectable by a Serial Poll.