GE Ecomagination AF-600 FP Programming Manual page 131

Parameter Description
See also signal flow chart in parameter group AP-2# No-
Flow Detection.
There are 3 different ways of using the sleep mode
function:
3 3
Illustration 3.40 Sleep Mode Function
1) Systems where the integrated PI controller is used for
controlling pressure or temperature, for example boost
systems with a pressure feedback signal applied to the
frequency converter from a pressure transducer. Set
parameter H-40 Configuration Mode for [3] Closed Loop and
configure the PI controller configured for desired reference
and feedback signals.
Example: Boost system.
Illustration 3.41 Boost System
If no-flow is detected, the frequency converter increases
the setpoint for pressure to ensure a slight overpressure in
130
the system (boost to be set in parameter AP-45 Setpoint
Boost).
The feedback from the pressure transducer is monitored,
and when this pressure has dropped with a set percentage
below the normal setpoint for pressure (P
acccel again and the pressure reaches the set value (P
Illustration 3.42 Boost System
2) In systems where the pressure or temperature is
controlled by an external PI controller, the wake-up
conditions cannot be based on feedback from the
pressure/temperature transducer as the setpoint is not
known. In the example with a boost system, desired
pressure P
set
ration Mode to [0] Open Loop.
Example: Boost system.
Illustration 3.43 Boost System
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set
is not known. Set Parameter H-40 Configu-
), the motor
).
set
DET-620D