4-56 BE1-951 Protection and Control 9328900990 Rev L
D2843-12
10-23-03
Figure 4-49. Mode 5, Integrating Timer
This type of timer is useful in applications where a monitored signal may be hovering at its threshold
between on and off. For example, it is desired to take some action when current is above a certain level
for a certain period of time. A 50T function could be used to monitor the current level. Thus, if the current
level is near the threshold so that the INITIATE input toggles between TRUE and FALSE from time to
time, the function will still time out as long as the time that it is TRUE is longer than the time that it is
FALSE. With a simple pickup/dropout timer, the timing function would reset to zero and start over each
time the initiate expression became FALSE.
Mode 6, Latch
A one-shot timer starts its timing sequence when the INITIATE input expression changes from FALSE to
TRUE. See
Figure 4-50. The timer will time for DELAY time T1 and then the output will latch TRUE.
Additional INITIATE input expression changes of state are ignored. Time (T2) is ignored.
D2863-07
10-23-03
Figure 4-50. Mode 6, Latch
BESTlogic Settings for 62/162 General Purpose Logic Timers
BESTlogic settings are made from the BESTlogic Function Element screen in BESTCOMS.
Figure 4-51
illustrates the BESTCOMS screen used to select BESTlogic settings for the Logic Timer elements. To
open the BESTlogic Function Element screen for Logic Timer, select Logic Timers from the S
creens pull-
down menu. Then select the BESTlogic button for either the 62 or the 162 element. Alternately, settings
may be made using the SL-x62 ASCII command.
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