Trane TR1 6002 Installation And Operation Manual page 47

206 Ramp Up Time
Value:
1 to 3600 seconds
Function:
The ramp up time is the acceleration time from 0 Hz to the rated motor
frequency set in parameter 104. It is assumed that the output current
does not reach the current limit set in parameter 215. This determines
the maximum acceleration rate for all modes of operation.
Description of choice:
Program the desired accel time. Too long of a ramp up time can cause
sluggish drive operation. Too short of a ramp up time can cause the
drive to go into current limit during acceleration or cause unacceptable
torque pulses in the controlled system.
For fan applications, factory setting of
parameter 206 is 60 seconds. For pump
applications, factory setting for parameter 206
is 10 seconds.
207 Ramp Down Time
Value:
1 to 3600 seconds
Function:
The ramp-down time is the deceleration time from the rated motor
frequency set in parameter 104, Motor Frequency, to 0 Hz. This
ramp-down time may be automatically extended to prevent an
overvoltage trip if the load regenerates to the drive. This determines
the maximum deceleration rate for all modes of operation.
✭ I
ndicates factory default setting. Numbers in brackets [ ] represent selection as displayed on the serial bus.
(RAMP UP TIME)
★ Depends on the unit
NOTE
(RAMP DOWN TIME)
★ Depends on the unit
Description of choice:
Program the desired decel time. Too long of a ramp down time can
cause sluggish operation. Too short of a ramp down time can cause the
drive to trip off due to high DC bus voltage or cause unacceptable
torque pulses in the controlled system.
Factory setting of parameter 207 for fan
applications, is 60 seconds. For pump
applications, factory setting for parameter 207
is 10 seconds.
208 Automatic Ramp Down
Value:
Disable (DISABLE)
★ Enable (ENABLE)
Function:
This function ensures that the drive does not trip during deceleration if
the decel time set is too short. If, during deceleration, the DC bus
voltage increases to the maximum value permitted, the drive automati-
cally extends the ramp-down time.
If auto ramp down is enabled, ramp time could
be considerably longer than that set in
parameter 207, Ramp Down Time.
Description of choice:
Program this function as Enable to avoid trips caused by too rapid a
deceleration.
209 Jog Frequency
Value:
Parameter 201, Output Frequency Low Limit, to parameter 202
Output Frequency High Limit
Function:
The jog frequency is the fixed output frequency at which the drive is
running when the jog function is activated.
Jog can be activated via the digital inputs.
Description of choice:
Set the desired frequency.
NOTE
(AUTO RAMPING)
[0]
[1]
NOTE
(JOG FREQUENCY)
★ 10.0 H
Z
47