Fuji Electric FRENIC-HVAC User Manual page 515

 Slow flowrate stop function (Mode selection) (J149, J249)
Select slow flowrate function operation. Set PID control 1 and PID control 2 with function
codes J149 and J249 respectively. As an item for judging about slow flowrate level stop, you
can select PID control operation quantity (MV) or feedback value (PV). If slow flowrate level
stop (mode selection) (J149, J249) = automatic operation 1 (11, 12), the feedback value (PV)
if the deviation goes from plus to minus or the output frequency are stored, and that value is
taken as the stop condition for the running level. If the slow flowrate level stop (mode
selection) (J149, J249) = automatic operation 2 (21, 22), when the flowrate sensor is turned
from ON to OFF, the feedback value (PV) or the output frequency are stored, and that value is
taken as the stop condition for the running level. (In this case, the flowrate sensor must be set;
refer to the page on J163 for details.) Also, during the above-mentioned automatic operation,
if only PID control 1 is enabled and PID control 2 is selected at (PID2/1), the value is not
stored and the stop condition is determined in accordance with the J249 setting.
Even if the slow flowrate level stop (mode selection) (J149, J249) is set to automatic
operation 2 (21, 22), function code J163: 0 (analog input selection), E01 to E07: 131
(flowrate switch) is disabled when unset.
Also, if function code J163: 0 (analog input selection) is set, if the ON/OFF level of
J164, J165 is OFF, the function code is disabled.
- Data setting range: 0 to 22
Data for
J149
0
1
2
11
12
21
22
With J149 = 1, 11, or 21 (frequency) selected
PV signal
SV: target value
J158: slow flowrate function cancel level 1
J160: slow flowrate function cancel level 2
MV frequency
F15: upper limiter
J157: initiation frequency
J150: slow flowrate function frequency
(Auto MV level)
J151:
slow flowrate
Output frequency
function elapse
time
Slow flowrate
Data for
Operation description
J249
0 Disable (display of OFF)
Manual operation (stop judgment:
1
MV)
Manual operation (stop judgment:
2
PV)
Auto operation 1 (stop judgment:
-
MV): Deviation detection method
Auto operation 1 (stop judgment:
-
PV): Deviation detection method
Auto operation 2 (stop judgment:
- MV): Flowrate sensor detection
method
Auto operation 2 (stop judgment:
- PV): Flowrate sensor detection
method
J159:
on-delay timer
J156:
initiation inhibition timer
6-205
6.3 Details of Function Codes
Stop condition
-
Operation quantity (MV) ≤
operation level (J150)
Feedback value (PV) ≤ operation
level (J150)
Operation quantity (MV) ≤ deviation
value automatically detected
Feedback value (PV) ≥ deviation
value automatically detected
Operation quantity (MV) ≤ flowrate
automatically detected
Feedback value (PV) ≥ flowrate
automatically detected
J151
Initiation is not detected
because the time is in the
time range of the
initiation inhibition timer.
Slow flowrate
J156
Initiation is performed
even though the time is
in the time range of the
initiation inhibition timer.