EVCO c-pro mega RACK - Manual (Page 87)

C-PRO MEGA RACK & C-PRO GIGA RACK APPLICATION MANUAL
Page 87
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Side band suction SetPoint (SP)
Outwith said neutral zone, device on or off requests for the configured fans will follow this logic:
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Switch on: when the supply pressure exceeds the setPoint + Neutral Zone threshold
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Switch off: when the pressure drops below the setPoint
In this type of regulation, the neutral zone is displaced to the right of the setPoint.
As may be deduced from the figure, regulation envisages setting two times, within which,
depending on the zone, the on and off requests for the various steps must be timed. The relevant
parameters are as follows:
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Switch-on time (NZ_TOn)
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Switch-off time (NZ_TOff)
In the case where the system is in the switch off zone, each switch off request will have to wait for
NZ_TOff seconds prior to being fulfilled. While, in the case of the switch on zone, each switch on
request will have to wait NZ_TOn seconds prior to being fulfilled.
6.5.3 Side band regulation with inverter
This type of control introduces inverter control to normal side band control, and in order to do this it
is essential to set several parameters relating to the inverter device it is intended to use, in addition
to enabling its use. The parameters in question are the following:
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Inverter differential (ID)
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Inverter enabling
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Inverter offset with respect to the supply setPoint (OFSI)
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Minimum inverter value (MinI)
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SpeedUp time
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Side band supply SetPoint (Sp)
The regulator output will assume different values depending on the value measured by the supply
probe.
If the value measured by the probe is less than or equal to the value of SP + OFSI, the regulator
output assumes the value 0.
SP SP + ZN
NZ_TOn NZ_TOff
Neutral zone
Switching on Switching off
Supply
SP + OFSI SP + OFSI + DI
Pressure
Inverter
MinI
100.00 %