GW Instek GPI-700A Series Programming Manual - Manual (Page 30)

GPI/GPT SERIES PROGRAMMABLE EST
PROGRAMMER MANUAL
⎯ 57 ⎯
When one of the bits of the enable registers is high and the corresponding
bit in the status register is high, the enable registers will perform a logical
OR function, the output that controls the set bit of the Status Byte
Register is high.
Various commands set the bits in the enable registers. The following
sections describe the enable registers and the commands that set them.
Event Status Enable Register (ESER): The ESER controls which types of
events are summarized by the Event Status Bit (ESB) in the SBR. The
bits of the ESER correspond to the bits of the SESR.
Use the *ESE command to set the bits in ESER. Use the *ESE? query to
read it.
OPERation Enable Register: Even though the OPERation Enable
Register is present in the programmable EST’s, the OPERation registers
do not report any conditions.
QUEStionable Enable Register: The QUEStionable Enable Register
controls which types of events are summarized by the QUES status bit in
the SBR. Use the STATus:QUEStionable:ENABle command to set
the bits in the QUEStionable Enable register. Use the
STATus:QUEStionable:ENABle?
query to read it.
Service Request Enable Register (SRER): The SRER controls which bits
in the SBR generate a service request.
Use the *SRE command to set the SRER. Use the *SRE? query to read
it.
GPI/GPT SERIES PROGRAMMABLE EST
PROGRAMMER MANUAL
⎯ 58 ⎯
Queues
The output queue is included to power supplies.
Output Queue: The programmable ESTs store query responses in the
output queue by succeeding the IEEE 488.2 protocol. If the power supply
receives a new command or query message after a message terminator,
the power supply will clear and reset this queue each time. The computer
must read a query response before it sends the next command (or query)
or it loses response to earlier queries.
Error/Event Queues
When an error or event occurs, the output queue stores the message. The
output queue stores and reports the messages on a FIFO (first in first out)
state. The SYSTem:ERRor? query reads the next item from the output
queue. If output queue overflows, the error message is –350, “Queue
overflow” ; the queue can’t store or report succeeding messages till it
is read or cleared.
Error Message
Table 8 lists the SCPI error messages for the programmable power
supplies.
Table 8 The error messages for the power supplies
SCPI Error Code and Description SESR Bit
0,"No error"
-100,"Command error" 5
-200,"Execution Error" 4
-221,"Settings conflict" 4
-221,"Settings conflict; Timer setting error" 4