ILX Lightwave LDT-5900 Series User Manual page 69

R E M O T E O P E R A T I O N S
3
C H A P T E R
St a t us Report ing
The Event Registers bits are set (and, if enabled, the SRQ is generated) only
when the enabled event condition transitions from the false state to the true state.
For example, if the Upper Temperature Limit event bit is enabled, the SRQ will be
generated when the measured temperature goes from in limit to over limit. If the
measured temperature stays over limit after the event is acknowledged (by
clearing the Event Registers with the EVENT? query) the next SRQ will only be
generated after the temperature returns to the in limit state and then again goes
over limit.
It is not necessary to enable event bits using the ENABLE:EVENT command to
use the Event Registers. The EVENT? query will return the correct state of the
event bits regardless of which bits are enabled in the Event ENable REgisters.
Only the generation of Service Requests and the state of the summary bit in the
*STB Register (see Chapter 4) are affected by the ENABLE:EVENT command.
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