IDEC MICROSmart FC6A Series Ladder Programming Manual

19: PID C ONTROL I NSTRUCTION
19-8 FC6A S ERIES MICROS MART L ADDER P ROGRAMMING M ANUAL FC9Y-B1726
10. Alarm Type
Select the type of alarm action from the following.
Type Action Example
No Alarm Action Do not output an alarm. -
Upper Limit Alarm
Turns ON the alarm output when process variable ≥
(set point + alarm value).
Turns OFF the alarm output when process variable ≤
(set point + alarm value - hysteresis).
When (set point + alarm value - hysteresis) < process
variable < (set point + alarm value), the alarm output
maintains the state of the previous scan.
Set point: 200.0°C
Alarm value: 5.0°C
Hysteresis: 2.0°C
When process variable ≥ 205.0°C, the alarm output is turned ON.
When process variable ≤ 203.0°C, the alarm output is turned OFF.
Set point: 200.0°C
Alarm value: -5.0°C
Hysteresis: 2.0°C
When process variable ≥ 195.0°C, the alarm output is turned ON.
When process variable ≤ 193.0°C, the alarm output is turned OFF.
Lower Limit Alarm
Turns ON the alarm output when process variable ≤
(set point + alarm value).
Turns OFF the alarm output when process variable ≥
(set point + alarm value + hysteresis).
When (set point + alarm value) < process variable <
(set point + alarm value + hysteresis), the alarm
output maintains the state of the previous scan.
Set point: 200.0°C
Alarm value: 5.0°C
Hysteresis: 2.0°C
When process variable ≤ 205.0°C, the alarm output is turned ON.
When process variable ≥ 207.0°C, the alarm output is turned OFF.
Set point: 200.0°C
Alarm value: -5.0°C
Hysteresis: 2.0°C
When process variable ≤ 195.0°C, the alarm output is turned ON.
When process variable ≥ 197.0°C, the alarm output is turned OFF.
Upper/Lower Limit
Alarm
Turns ON the alarm output when process variable ≥
(set point + alarm value).
Turns ON the alarm output when process variable ≤
(set point - alarm value).
Turns OFF the alarm output when (set point - alarm
value + hysteresis) ≤ process variable ≤ (set point +
alarm value - hysteresis).
When (set point + alarm value - hysteresis) < process
variable < (set point + alarm value), the alarm output
maintains the state of the previous scan.
When (set point - alarm value) < process variable <
(set point - alarm value + hysteresis), the alarm
output maintains the state of the previous scan.
Set point: 200.0°C
Alarm value: 5.0°C
Hysteresis: 2.0°C
When process variable ≥ 205 .0 °C, the alarm output is turned ON.
When process variable ≤ 195 .0 °C, the alarm output is turned ON.
When 197.0°C ≤ process variable ≤ 203.0°C, the alarm output is turned OFF.
OFF
ON
+ Alarm action pointSet point
Hysteresis
Alarm value
- Alarm action point
OFF
ON
205.0°C203.0°C200.0°C
2.0°C
5.0°C
OFF
ON
193.0°C 195.0°C 200.0°C
2.0°C
5.0°C
OFF
ON
+ Alarm action pointSet point
Hysteresis
- Alarm action point
Alarm value
OFF
ON
205.0°C 207.0°C 200.0°C
2.0°C
5.0°C
OFF
ON
195.0°C 197.0°C 200.0°C
2.0°C
5.0°C
OFF
ON
Alarm action pointSet point
HysteresisHysteresis
Alarm action point
Alarm value Alarm value
OFF
ON
195.0°C 197.0°C 200.0°C 203.0°C 205.0°C
5.0°C 5.0°C
2.0°C 2.0°C

IDEC MICROSmart FC6A Series Specifications

General

Brand	IDEC
Model	MICROSmart FC6A Series
Category	Computer Hardware
Language	English