TECO F33 Series, Instruction Manual, Page: 95 / 192

92 Functional Description
Communication information
Fig. 77
Deceleration Time from Minimum
Speed [336]
If a minimum speed is programmed, this parameter will
be used to set the deceleration time from the minimum
speed to 0 rpm at a stop command. The ramp time is
defined as the time it takes for the motor to decelerate
from the nominal motor speed to 0 rpm.
Communication information
Acceleration Ramp Type [337]
Sets the type of all the acceleration ramps in a parame-
ter set. See Fig. 78. Depending on the acceleration and
deceleration requirements for the application, the
shape of both the ramps can be selected. For applica-
tions where speed changes need to be started and
stopped smoothly, such as a conveyor belt with materi-
als that can drop following a quick speed change, the
ramp shape can be adapted to a S-shape and prevent
speed change shocks. For applications that are not crit-
ical in this, the speed change can be fully linear over
the complete range.
Communication information
Fig. 78 Shape of acceleration ramp
Default: 10.0 s
Range: 0.50-3600 s
Modbus Instance no/DeviceNet no: 43105
Profibus slot/index 169/9
Fieldbus format Long, 1=0.01
Modbus format EInt
Default: 10.0 s
Range: 0.50-3600 s
Modbus Instance no/DeviceNet no: 43106
Profibus slot/index 169/10
Fieldbus format Long, 1=0.01 s
Modbus format EInt
335 Acc>Min Spd
Stp 10.0s
A
time
rpm
Nom.Speed
Max speed
Min speed
[335]
[331] [332]
[336]
[341]
[343]
[225]
336 Dec<Min Spd
Stp 10.0s
A
Default: Linear
Linear 0 Linear acceleration ramp.
S-Curve 1 S-shape acceleration ramp.
NOTE: For S-curve ramps the ramp times, [331] and
[332], defines the maximum acceleration and
deceleration rated, i.e. linear part of S-curve, just as for
the linear ramps. The S-curves are implemented so that
for a speed step below sync speed the ramps are fully S-
shaped while for larger steps the middle part will be
linear. Therefore will a S-curve ramp from 0 –sync speed
take 2 x Time while a step from 0–2 x sync speed will
take 3 x Time (middle part 0.5sync speed – 1.5sync
speed linear). Also valid for menu [337], D.eceleration
ramp type.
Modbus Instance no/DeviceNet no: 43107
Profibus slot/index 169/11
Fieldbus format UInt
Modbus format UInt
337 Acc Rmp
Stp Linear
A
rpm
t
Linear
S-curve