2100-900-01 Rev. D / September 2011 Return to Section Topics B-21
Model 2100 6 1/2-Digit Resolution Digital Multimeter User’s Manual Appendix B: Remote Interface Reference
have event registers which belong to read-only registers and report defined conditions in a
multimeter. Bits are latched in the event registers. As long as an event bit is set, subsequent state
changes will be ignored. Besides, bits in an event register are cleared automatically by the
commands, for example: *ESR?, STAT:QUES:EVEN? or *CLS. Please note that the reset
command (*RST) or device clear in event registers won’t clear bits. To query an event register will
return a decimal value corresponding to binary-weighted sum of all bits set in the register.
An enable register is readable and writable, and can define which bits in the corresponding event
register are ORed together to generate a single summary bit. To query an enable register won’t
clear it, as well the command *CLS, but it can clear the bits in the event registers. And the
command STATus:PRESet will clear the questionable data enable register. Moreover, to enable
bits in an enable register, users have to write a decimal value corresponding to the binary-
weighted sum of the bits in the register by their demands.
Figure B-1
Binary weights
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