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EVT4 Action
EVT4 Type
P Control Action
ON/OFF Control Action
ORP input low limit
action
EVT4 proportional band
ON
OFF
EVT4
value
If Medium Value is selected in [EVT4
hysteresis type]:
EVT4 ON sides
ON
OFF
EVT4 value
If Reference Value is selected in [EVT4
hysteresis type]:
EVT4 ON side
EVT4 OFF side
ON
OFF
EVT4 value
ORP input high limit
action
EVT4 proportional band
ON
OFF
EVT4
value
If Medium Value is selected in [EVT4
hysteresis type]:
EVT4 ON sides
ON
OFF
EVT4 value
If Reference Value is selected in [EVT4
hysteresis type]:
ON
OFF
EVT4 value
(Fig 7.6-1)
Timing chart of EVT4 output ON time and OFF time while in EVT4 output ON
(Fig. 7.6-2)
OFF
ON
OFF
ON
Actual EVT4 output
EVT4 output to
which ON time and
OFF time are set.
ON
time
ON
time
ON
time
OFF
time
OFF
time
ON time is turned
OFF, caused by the
actual EVT4 output
turning OFF.
EVT4 ON side
EVT4 OFF side