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6-4 Alarm function (option)
1) Kinds of alarm
• Absolute value alarm, deviation alarm, combination alarm, and zone alarm are available.
(For details, see Table 4, Alarm action type codes on page 4.)
No.
Function
Description Parameters to set
(1)
(2)
(3)
(4)
(5)
Hysteresis Set the hysteresis to avoid chattering. Alarm 1 :
Alarm 2 :
Alarm 1 :
Alarm 2 :
ON delay
The alarm is turned on with delay of a certain seconds
as previously set after PV goes in the alarm band.
Error status
alarm
Alarm is turned on when error indications are
displayed.
De-energizing Alarm output can be de-energized.
Alarm latch Keeps the alarm ON status once an alarm is
turend ON. To cancel the alarm latch, please take
one of the following procedure.
i) Turn ON the controller again.
ii) Turn the alarm latch settings to OFF once.
iii) Use alarm latch cancel parameter.
iv) Cancel by Digital input.
v) Cancel by communication function.
When the power is turned OFF or in Standby mode, even if de-energizing
function is turned ON, it cannot be output (it is kept OFF).
function
Energizing/de-energizing
function
Alarm 1 :
Alarm 2 :
Alarm 1 :
Alarm 2 :
Alarm 1 :
Alarm 2 :
ON delay setting time
ON
Alarm
OFF
ON
OFF
ON
OFF
Without ON delay function
With ON delay function
Relay output
ON
OFF
ON
OFF
ON
OFF
Without
De-energizing
function
With
De-energing
function
Caution
,
2) Alarm function