Fuji Electric FRENIC-HVAC User Manual page 550

 External PID control 1 (Upper level alarm (AH) (J522, J622, J672)
J522/J622/J672 specifies the upper limit (AH) for alarms in a physical quantity.
- Data setting range: OFF, -999.00 to 0.00 to 9990.00
The physical quantity is dependent on the display unit and maximum/minimum scale
specified by the following function codes.
External PID control 1
External PID control 2
External PID control 3
 External PID control 1 (Lower level alarm (AL) (J524, J624, J674)
J524/J624/J674 specifies the lower limit (AL) for alarms in a physical quantity. The physical
quantity is dependent on the display unit and maximum/minimum scale specified by the
function codes listed above.
- Data setting range: OFF, -999.00 to 0.00 to 9990.00
Upper level alarm (AH) and lower level alarm (AL) also apply to the following alarms.
Alarm
Upper limit
ON when AH < PV
(absolute)
ON when AH < SV
ON when AH < MV
Lower limit
ON when PV < AL
(absolute)
ON when SV < AL
ON when MV < AL
Upper limit
ON when SV + AH < PV
(deviation)
Lower limit
ON when PV < SV - AL
(deviation)
Upper/lower
ON when |SV - PV| > AL
limit (deviation)
Upper/lower
ON when SV - AL < PV < SV + AL
range limit
(deviation)
Upper/lower
ON when AL < PV < AH
range limit
ON when AL < SV < AH
(absolute)
ON when AL < MV < AH
Upper/lower
ON when SV - AL < PV < SV + AH
range limit
(deviation)
Display unit Maximum scale
J505
J605
J655
Description
Select alarm output
Absolute-value
alarm
Deviation alarm
Deviation alarm
Absolute-value
alarm
Deviation alarm
6-240
Minimum scale
J506 J507
J606 J607
J656 J657
How to handle the alarm:
Parameter setting
(J521/J621/J671)
AL = 0
AH = 100%
AL = 100%
AH = 100%
AL = AH
A negative logic
signal should be
assigned to
EPV1-ALM,
EPV2-ALM, or
EPV3-ALM