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
) to the forced reference (set by parameter
). 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
No analog input selected
0
AI1
Pump/fan outlet pressure monitored through analog input
AI1
1
AI2
See selection
.
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
is taken after a delay set with
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
.
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
.
100.00%
0.00…100.00% Supervision level
1 = 0.01%
All parameters
No.
Name/Value
Description
Def/FbEq
Measured outlet
pressure
t
t
EXT2 reference
(from PID1OUT)
Aotewell Ltd
www.aotewell.com
Industry Automation
HongKong|UK|China
+86-755-8660-6182