Instrument Commands; Fetch And Measure Subsystem - Delta A9000 User Manual

User Manual
A9000
AC Power Source
Bit
name
definition
*SRE?
*STB?
*CLS

6.3.2 Instrument Commands

6.3.2.1 FETCH and MEASURE Subsystem

Differences between FETCH and MEASURE are: FETCH reads existing measurements
value. Execution time is shorter because data is available immediately but the data may
not be the newest. Instrument will send computer the next sampling data after receiving
MEASURE command. There is time delay so 100ms between MEASure command and
query command is recommended. MEASure command is suitable for power supply output
status changed and wants to get updated measurement value.
Following are tree diagram for FETCH and MEASURE commands:
FETCh | MEASure
:CURRent
:AC?
:1?
:2?
80 │ www.deltaww.com
This command is for a register used for IEE488.2 and instrument defined
service events. It is used for flag mask or control enable. Set by 1 enables
target event detection, and event detection is masked if setting is 0. No
response to target events when 0 is set. Bits configuration for service events
register：
7 6
---- MSS/SRQ
Service
request
Return status of flag mask status for service events.
Query value stored in service event register, 1 represents event occurs.
Clear status. Following operation may execute depends on different conditions.
1. Leave out REMOTE control, back to panel control.
2. When one of the following error occurs, turn off output, clear error status,
back to main manual
 Software OCP
 D2A OCP Fault
 D2A OPP Fault
5
ESB
Brief info. For service
event register
Query the total AC rms current
Query the phase 1 AC rms current
Query the phase 2 AC rms current
4 3
MAV ----
Info. available
2 1 0
---- ---- ----