Baldor 29M Installation And Operating Manual page 55

Block Title Parameter
PRESET Preset Speeds
#1 – #15
SPEEDS
ACCEL/DECEL Accel Time #1,2
RATE
Decel Time #1,2
S-Curve #1,2
JOG SETTINGS Jog Speed
Jog Accel Time
Jog Decel Time Jog Decel Time
Jog S-Curve
20
%
0
4-10 Programming & Operation
Table 4-2 Level 1 Parameter Block Definitions
Description
Allows selection of 15 predefined motor operating speeds.
Each speed may be selected using external switches connected to J1B-11, J1B-12,
J1B-13 and J1B-14.
For motor operation, a motor direction command must be given along with a preset
speed command.
Accel time is the number of seconds required for the motor to increase at a linear rate
from 0 RPM to the RPM specified in the "Max Output Speed" parameter in the Level 2
Output Limits block. Accel Time #2 is accessible in Standard Run 3 Wire and 15
Speed 2 Wire modes only.
Example: Maximum Output Speed =1000 RPM; Preset Speed = 500 RPM, Accel
Time=10 Sec.
In this example, motor will be at 500 RPM 5 seconds after commanded because preset
is half the max speed.
Decel time is the number of seconds required for the motor to decrease at a linear rate
from the speed specified in the "Max Output Speed" parameter to 0 RPM.
S-Curve is a percentage of the total Accel or Decel time and provides smooth starts and
stops.
Figure 4-2 illustrates how motor acceleration is changed using a 40% S-Curve.
0% represents no "S" and 100% represents full "S" with no linear segment.
Note: Accel #1, Decel #1 and S-Curve #1 are associated together. Likewise,
Note: If faults (motor trips) occur during rapid Accel or Decel, selecting an S-curve
Jog Speed changes motor speed to a new preset value for jog mode. To cause motor to
operate at Jog Speed the FWD or REV key must be pressed or external command
Forward (J1B-9) or Reverse (J1B-10). The motor will run at jog speed until FWD or Forward (J1B 9) or Reverse (J1B 10) The motor will run at jog speed until FWD or
REV key is released or external command signal is removed. Jog speed can be less
than the minimum s eed arameter setting. than the minimum speed parameter setting.
Jog Accel Time changes the Accel Time to a new preset value for jog mode.
Jog Decel Time changes the Decel Time to a new preset value for jog mode Jog Decel Time changes the Decel Time to a new preset value for jog mode.
Jog S-Curve changes the S-Curve to a new preset value for jog mode.
Figure 4-2 S-Curve Example
40%
Curve
20
0%
%
Curve
Accel Time Max
Accel S-Curves
Accel #2, Decel #2 and S-Curve #2 are associated together. These
associations can be used to control any Preset Speed or External Speed
Command (Pot).
may eliminate the faults without affecting the overall ramp time.
g
0
40%
Curve
0%
20
Curve
%
20
%
Decel Time Max
Decel S-Curves
MN1230