Toshiba Q-Flowsaver II - Manual (Page 42)

TOSHIBA
9.0 Keypad Operating Functions
This section discusses keypad operating functions. All of the functions that can be accessed
through the keypad, are discussed. The functions are listed and discussed in the order in which
they are accessed. The item number identifier following the function is used for ease of location
in the System Parameters Adjustment Range and Factory Settings (see section 7.2).
9.1 SETUP PARAMETERS
ACCELERATION TIME #1 (ITEM 1) - Sets the time required to accelerate from OHz to
the maximum frequency (FH) set by function [:FH].
Setting this time to low can
cause undue stress and over current tripping of the drive.
DECELERATION TIME #1 (ITEM 2) - Sets the time required to decelerate from
maximum frequency (FH) to OHz.
Setting this time to low can cause undue stress
and over voltage tripping of the drive.
UPPER FREQUENCY LIMIT (ITEM 3) - Sets the upper frequency limit of applications.
The inverters frequency can be increased up to this upper limit and cannot be increased
any further. The value of the maximum safe frequency (FH) must be equal to or
greater than the upper frequency limit.
LOWER FREQUENCY LIMIT (ITEM 4) - Sets the lower frequency limit of applications.
The inverters frequency can be decreased down to this lower limit and cannot be
decreased any further without stopping or resetting the lower limit.
TERMINAL IV REFERENCE POINT# 1 (ITEM 5) - Sets the percentage of the input
signal on terminal IV which is used to reference the # 1 output frequency (PI) designated
by function [F-P1]
POINT # 1 OUTPUT FREQUENCY (ITEM 6) - Sets the output frequency used for
reference point function [FP-1].
TERMINAL IV REFERENCE POINT # 2 (ITEM 7)- Sets the percentage of the input
signal on terminal IV which is used to reference the # 2 output frequency designated
by function [F-P2]
POINT # 2 OUTPUT FREQUENCY (ITEM 8) - Sets the output frequency used for
reference point [FP-2].
ELECTRONIC THERMAL PROTECTION LEVEL (ITEM 9) - Sets the thermal overload
detection level to match the ratings and characteristics of the motor being used (10 to
100% of rated output current). The inverter can run at 110% continuously and may
cause unnecessary motor overheating unless this compensation is used.
STALL PREVENTION ACTIVATION LEVEL (ITEM 10) - Sets the activation level of the
stall protection function (90 to 120% of rated output current). When the stall level is
reached the inverter begins a soft stall procedure by lowering the frequency and voltage
to prevent overcurrent tripping. Once the soft stall procedure starts the output current
will be clocked. If output current is not reduced within a specified time a fault will occur.
The soft stall function is particularly useful Is situations where load current decreases
as the revolution speed decreases (fan and pump equipment). This function is activated
through the Electronic Thermal Protection Select (:SEL4).
Instantaneous trip current
limits are factory set and are dependent upon inverter size as well as the motor
ripple current.
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