Actual signals and parameters 253
PROTECT Detection of high outlet pressure produces an alarm on the
control panel display. The output of the PI controller is
ramped down (according to parameter 4417 PID OUT DEC
TIME) to the forced reference (set by parameter 4416
OUTLET FORCED REF). The drive reverts to the original
reference if the pressure subsequently falls below the
supervision level.
The following diagram describes the outlet pressure
supervision function.
2
FAULT Detection of high outlet pressure trips the drive on a fault. 3
4410 AI MEAS
OUTLET
Selects the analog input for pump/fan outlet pressure
supervision.
NOT SEL
NOT SEL No analog input selected 0
AI1 Pump/fan outlet pressure monitored through analog input
AI1
1
AI2 See selection AI1.2
4411 AI OUT HI
LEVEL
Sets the supervision limit for the primary outlet pressure
measurement. If the value of the selected analog input
exceeds this limit, the action defined by parameter 4409
OUTLET PROT CTRL is taken after a delay set with
parameter 4415 OUTLET CTRL DLY expires.
100.00%
0.00…100.00% Supervision level 1 = 0.01%
4412 VERY HIGH
CTRL
Enables, and selects the mode of, the secondary outlet
pressure supervision function. The function uses the analog
input selected by parameter 4410 AI MEAS OUTLET.
NOT SEL
NOT SEL Secondary outlet pressure monitoring not used 0
STOP Detection of very high outlet pressure stops the drive. The
drive starts again if the pressure falls below the supervision
level.
1
FAULT Detection of very high outlet pressure trips the drive on a
fault.
2
4413 AI OUT VERY
HIGH
Supervision level for secondary outlet pressure monitoring
function. See parameter 4409 OUTLET PROT CTRL.
100.00%
0.00…100.00% Supervision level 1 = 0.01%
All parameters
No. Name/Value Description Def/FbEq
Measured outlet
pressure
4415
4413
4411
4417
4416
t
t
EXT2 reference
(from PID1OUT)
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