Omron E5ZN - Close in Alarm;Open in Alarm

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Alarm Hysteresis Section 4-2
4-2-3 Close in Alarm/Open in Alarm
• When the E5ZN is set to “close in alarm,” the status of the alarm output
function is normally open. When set to “open in alarm,” the status of the
alarm output standby is normally closed.
• The close in alarm/open in alarm status can be set independently for each
alarm.
• The close in alarm/open in alarm settings are set in the “Alarm 1 to 3 open
in alarm” parameters.
• Default is “0: Close in alarm.”
• When “alarm 1 open in alarm” is set, the heater burnout alarm and input
error outputs are both open in alarm.
• The alarm output will turn OFF (open) for about four seconds when power
is interrupted or after the power is turned ON regardless of the close in
alarm/open in alarm setting.
Summary of Alarm
Operations
The figure below visually summarizes the above description of alarm opera-
tions when a lower limit alarm with standby sequence and close in alarm are
set.
Setting Alarm output function Alarm output Operation indicator
(LED)
Close in
alarm
ON ON Lit
OFF OFF Not lit
Open in
alarm
ON OFF Lit
OFF ON Not lit
Alarm type: Lower limit alarm with
standby sequence
Alarm value
PV
Alarm output function
Alarm output
Standby sequence
canceled
Alarm hysteresis
Time
ON
OFF
ON (closed)
OFF (open)