发表于:2008-05-21 23:01:23
1楼
Time-stamped alarms are similar to digital alarms, except that a counter is used to provide an accurate timestamp of when a triggering condition occurs, rather than just the time the variable was polled. Time-stamped alarms can only be associated with a single digital variable.
主要用在需要打毫秒级时标的报警场合,需要硬件支持报警时标功能。例如:SOE