Toshiba Adjustable Speed Drive H3 - Manual (Page 88)

TOSHIBA
9 - 19
Parameter Explanations (cont'd)
Item 167, LOW CURRENT DETECT LEVEL - Enter the current amount (in % or amps depending on setting
of Item 296) below which the drive will trip and/or close an appropriately-programmed output contact.
Item 168, LOW CURRENT DETECTION TIME - Enter the time the output current must be below the
amount set in Item 167 before the drive trips and/or closes an appropriately-programmed output contact.
Item 169, OUTPUT SHORT-CIRCUIT DETECTION SELECT - To protect itself, the drive does an output
short-circuit check every time a run is initiated. This parameter changes the short-circuit check:
0: Standard setting
1: When a low impedance motor is used, this setting desensitizes the short-circuit check,
reducing nusiance trips.
2: This setting programs the drive to perform the check at power up only.
3: Combination of 1 and 2 above.
Do not operate the drive on a motor with power factor correction capacitors.
Item 170, OVERTORQUE TRIP SELECTION - Enter a "1" here to program the drive to fault OVERTORQUE
TRIP based on on the torque current amount. See Item 171.
Item 171, OVERTORQUE TRIP LEVEL - Enter the torque current (in % or amps depending on the setting
of Item 296, CURRENT UNITS SELECTION ) at which the drive trips and/or closes an appropriately-
programmed output contact (see Items 60,63, or 66 and setting values 28/29 on page 9-11).
Item 172, FAULT TRIP SAVING - This parameter determines the effect of cycling power on a faulted
drive:
0: Fault and fault data cleared when drive powers up.
1: Drive powers up in tripped state (drive display remains in faulted state, but fault data and fault
contact are not maintained).
The setting of Item 153, NUMBER OF RETRY ATTEMPTS , is ignored by the drive when Item 172 is
set to "1".
Item 173, COOLING FAN CONTROL SELECTION -
This parameter determines if the drive's fan is
thermostatically-controlled or if it runs continuously.
Item 174, CUMULATIVE RUN TIMER ALARM SETTING -
One of the drive's output contacts can be
programmed to change state based upon the time entered here. See Items 60,63, or 66 and setting values
56/57 on page 9-12. ".01" is one hour.
PATTERN RUN
The H3 has a feature called pattern run that emulates a low-level PLC. During a pattern run, the drive
follows a
pattern group by running at the user's preset speeds for desired amounts of time in desired
directions with desired accel/decel times for a defined number of cycles. The H3 has 15 preset speeds,
any of which can be assigned to be speeds zero through seven in a pattern group. The drive can hold up
to four separate pattern groups, any of which can be remotely selected to run.
Item 175, PATTERN RUN SELECTION - This parameter enables pattern run. When stopping/starting
drive from panel, pattern run takes priority over the keypad's frequency reference.
Item 176, PATTERN RUN CONTINUE MODE - This parameter determines if a pattern group is continued
after a pattern run is stopped and restarted:
0: Pattern group starts over with its first speed
1: Pattern resumes at the time of and with the speed at interruption