YOKOGAWA YewSeries 80, User Manual

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4-6
IM 01B04K02-02E
4.3 Example of Alarm Function Setting
This section describes the alarm function setting showing the example using the alarm
function parameters.
4.3.1 Condition of Alarm Function
Set the following conditions.
(1) Condition for Alarm 1
The alarm is output when the status where the input value is 80°C or more continues for
1 second or more.
The alarm is released when the status where the input value is 70°C or less continues for
2 seconds or more.
(2) Condition for Alarm 2
The alarm is output when the input value is 15°C or less.
The alarm is released when the input value is 20°C or more.
4.3.2 Parameters of Alarm Function
The table below shows the parameters the condition of alarm function described in 4.3.1 is
placed to.
Table 4-1 Table of Parameter Setting Example
Item Alarm 1 Alarm 2
Parameter Set point Parameter Set point
Alarm set point E01: SET POINT1 80 °C E02: SET POINT2 15 °C
Direction of alarm action E07: ALM1 ACTION DIRECT E08: ALM2 ACTION REVERSE
Alarm hysteresis E09: HYSTERESIS1 10 °C E10: HYSTERESIS2 5 °C
Alarm ON delay E15: ON DELAY1 1 s E16: ON DELAY2 0 s
Alarm OFF delay E17: OFF DELAY1 2 s E18: OFF DELAY2 0 s
4.3.3 Operating Condition of Alarm Function
Refer to the following figure for operating condition of alarm 1 and alarm 2.
F0404.ai
0
20
15
40
60
80
100
Alarm condition established
Alarm-released condition established
Alarm-1 set point >
Alarm-2 set point >
Alarm condition established
Alarm-released condition established
Alarm-1 hysteresis (10 )
1 s 2 s
Elapsed time (s)
Alarm-2 hysteresis (5 )
Alarm-1 Direct
action
Alarm-2 Reverse
action
De-energized
De-energized
Energized
De-energized
Energized De-energized
Figure 4-4 Alarm Action