8. PARAMETER DESCRIPTION
IMR02C15-E4
8-33
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[Alarm action]
LBA determination range: Thermocouple/RTD input: 2 °C [°F] fixed
Voltage/Current input: 0.2 % of span fixed
• When the output reaches 0 % (low limit with output limit function)
For direct action: When the LBA time has passed and the PV has not risen beyond the alarm
determination range, the alarm will be turned on.
For reverse action: When the LBA time has passed and the PV has not fallen below the alarm
determination range, the alarm will be turned on.
• When the output exceeds 100 % (high limit with output limit function)
For direct action: When the LBA time has passed and the PV has not fallen below the alarm
determination range, the alarm will be turned on.
For reverse action: When the LBA time has passed and the PV has not risen beyond the alarm
determination range, the alarm will be turned on.
If the Autotuning function is used, the LBA time is automatically set twice as large as the
integral time. The LBA setting time will not change even if the integral time is changed.
If the LBA function detects an error occurring in the control loop, but cannot specify the
location, the control loop should be checked. The LBA function does not detect the location
which causes alarm status. If LBA alarm is ON, check each device or wiring in the control
loop.
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