M.The drive shall have an adjustable retry function after a fault. Both number of attempts (at least 10) and time between
N.The drive shall have an adjustable output short circuit detection selection for standard motor and
O.The drive shall have two programmable: volt per hertz patterns, maximum output frequencies, electronic thermal protection settings, stall protections, base frequencies, voltage boosts, and stall protection selections which can be chosen while running to run motor A or motor B.
P.The drive shall have an analog input filter adjustment to limit the effects of noise on the control signal.
Q.The drive shall permit switching between local/remote operation as well as manual/auto “on the fly.”
R.The drive shall have the ability to ignore run commands until a “dampers open” signal is received. In the event a “dampers open” signal is absent the drive shall be capable providing a “close damper” signal. Upon receipt of “drive stop” signal The ASD shall be capable of providing a close damper signal.
S.The drive shall be provided with
T.The drive shall have the following user selectable contingencies in the event of loss of analog control signal while the drive is running before loss:
i.Run at the user set lower frequency limit.
ii.Run at the user set upper frequency limit.
iii.Trip with a signal loss fault.
iv.Run at
2.4Operational Functions
A.The drive shall contain two separate acceleration/deceleration times with auto tuning for optimum setting (0.1 to 6000 seconds) with choice of linear, S, or C curves.
B.The drive shall be equipped with both local/remote and manual/auto keys on touch pad.
C.The drive shall be equipped with a quick setup key with 18 most frequently parameters in a HVAC type application.
D.The drive shall contain fifteen preset speeds, which can be activated from the keypad, terminal inputs, and host computer.
E.The drive shall have the capability of storable special custom user setting.
F.The drive shall restart into a rotating motor operating in either the forward or reverse direction and match that frequency.
G.The drive shall have adjustable soft stall (10% - 150%) which reduces frequency and voltage of the inverter to sustain a run in an overload situation.
H.The drive shall be capable of performing a time base pattern run using 4 groups of 8 patterns each using the 15 preset speed values for a maximum of 32 different patterns.
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