Product Overview 1-15
1560D-UM051D-EN-P – February 2005
Preset Slow Speed Option
This option can be used in applications that require a slow-speed jog for
general purpose positioning. Preset Slow Speed provides either 7% of
base speed (low) or 15% of base speed (high) settings in the forward
direction. Reverse can also be programmed and offers 10% of base speed
(low) and 20% of base speed (high) settings.
Forward
15% – High
7% – Low
10% – Low
20% – High
Reverse
Time (seconds)
Run
Start
Forward
15% – High
7% – Low
10% – Low
20% – High
Reverse
Time (seconds)
Run
Start
Figure 1.14 – Preset Slow Speed Option
Important: Slow speed running is not intended for continuous operation due
to reduced motor cooling. The two starts per hour limitation also applies to
slow speed operation. This option employs a cycle-skipping scheme which
produces limited torque. Applications should be checked with the factory.
SMB™ Smart Motor Braking Option
This option can be used in applications that require reduced stopping times.
The MV Dialog Plus™ controller incorporates a microprocessor-based
system that applies braking current to a standard squirrel-cage induction
motor without any additional equipment. This option offers a user-adjust-
able braking current setting from 0 to 400% of the motor's full load current
rating. Furthermore, it provides automatic shut-off at zero speed detection.
Motor
Speed
100%
Automatic
Zero Speed
Shut-off
Smart Motor Braking
Coast-to-rest
Time (seconds)
Start Run
Brake
Motor
Speed
100%
Automatic
Zero Speed
Shut-off
Smart Motor Braking
Coast-to-rest
Time (seconds)
Start Run
Brake
Figure 1.15 – SMB Smart Motor Braking Option
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