![background image](http://html1.mh-extra.com/html/extech-instruments/7630/7630_operation-manual_2453709102.webp)
96
registers and if you wish to clear the register you must set it to a value of 0. Like the event
register, the enable register is represented as a decimal number that equals the binary-weighted
sum of all bits.
The enable register will clear to value of 0 at power up unless the *PSC 0 command had been
executed before power-off. The *PSC command tells the device whether or not it should
clear the enable registers at power-on. Using this command will allow SQRs to function
immediately after power-on.
Standard Event Register
Status Byte Register
Bit Binary
weight
Event Register
Enable
Register
Summary
Register
Enable
Register
0
1
Operation Complete
ALL PASS
1 2
not
used
FAIL
2 4
Query
Error
ABORT
3
8
Device Error
TEST IN PROCESS
4
16
Execution Error
Message Available (MAV)
5
32
Command Error
Event Summary Bit (ESB)
6
64
not used
Request Service (RQS) or
Master Summary Status (MSS)
not used
7 128
Power
On
PROMPT
*ESR?
*ESE
*STB? | SPOLL
*SRE
*ESE?
*SRE?
6.4 Non Volatile Memory
The instrument saves each parameter in non-volatile memory when the file save "FS"
command is used to save the file. The non-volatile memory has a limited write cycle life,
therefore for programmers who wish to send all parameters before executing each test the
"FS" command should not be used. The parameters will be stored in the CPU's Random
Access Memory (RAM) until another memory location is selected. However, settings
written to RAM from GPIB/RS-232 mode will be lost when power is shut down. Parameter
changes to RAM are unlimited and will not effect the life of the internal non-volatile memory
chip.