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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.)
ON delay function
Alarm
Without ON delay function
With ON delay function
Energizing/de-energizing function
Relay output
Without
De-energizing
function
With
De-energing
function
2) Alarm function
No.
Function
q Hysteresis
w ON delay
e Alarm latch
r Error status
alarm
t De-energizing Alarm output can be de-energized.
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Description
Set the hysterisis to avoid chattering.
The alarm is turned on with delay of a certain seconds
as previously set after PV goes in the alarm band.
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 lacth cancel parameter.
iv) Cancel by Digtal input (DI1).
v) Cancel by communication function.
Alarm is turned on when error indications are
displayed.
– 19 –
ON delay setting time
Parameters to set
Alarm 1 :
Alarm 2 :
Alarm 1 :
Alarm 2 :
Alarm 1 :
Alarm 2 :
Alarm 1 :
Alarm 2 :
Alarm 1 :
Alarm 2 :
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