Fuji Electric FRENIC-HVAC User Manual page 509

Data for Data for
Alarm
J121 J221
3 3 Absolute-value alarm
(with Hold and
Latch)
Absolute-value alarm
-- 50
(PID control cancel)
4 4 Deviation alarm
5 5 Absolute-value alarm
(with Hold)
6 6 Absolute-value alarm
(with Latch)
7 7 Absolute-value alarm
(with Hold and
Latch)
Hold: During the power-on sequence, the alarm output is kept OFF (disabled) even when
the monitored quantity is within the alarm range. Once it goes out of the alarm range,
and comes into the alarm range again, the alarm is enabled.
Latch: Once the monitored quantity comes into the alarm range and the alarm is turned ON,
the alarm will remain ON even if it goes out of the alarm range. To release the latch,
perform a reset by using the
Resetting can be done by the same way as resetting an alarm.
PID control cancel:
While PID-ALM is ON, as when Hz/PID is ON, switches from PID control to
manual frequency setting (operates according to multi-frequency, keypad, analog
input or other set frequencies).
 PID control 1, 2 (upper level alarm (AH)) (J122, J222)
Set the upper limit (AH) for alarms with physical quantity.
- Data setting range: -999.00 to 0.00 to 9990.00
 PID control 2 (upper level alarm detection hysteresis range (J223)
Set the hysteresis range for the upper limit (AH) detection (J222) for alarms with physical
quantity. Please set a value smaller than the upper limit alarm (AH) (J222).
- Data setting range: 0.00 to 9990.00
 PID control 1, 2 (lower level alarm (AL)) (J124, J224)
Set the lower limit (AL) for alarms with physical quantity.
- Data setting range: -999.00 to 0.00 to 9990.00
6.3 Details of Function Codes
Description
Same as above (with Hold and Latch)
Same as above (PID control cancel)
This function is available only on PID control 2
While PV < SV - AL or SV + AH < PV,
PID-ALM is ON.
Same as above (with Hold)
Same as above (with Latch)
Same as above (with Hold and Latch)
key or turning the terminal command RST ON.
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