Minarik DIGI-LOK DLC300 Manual de usuario
USER’S MANUAL
Model DLC300/DLC400
DIGI-LOK®Programmable Digital Control
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Copyright 2000 by
Minarik Corporation
All rights reserved. No part of this manual may be reproduced or transmitted in any
form without written permission from Minarik Corporation. The information and
technical data in this manual are subject to change without notice. Minarik
Corporation and its Divisions make no warranty of any kind with respect to this
material, including, but not limited to, the implied warranties of its merchantability
and fitness for a given purpose. Minarik Corporation and its Divisions assume no
responsibility for any errors that may appear in this manual and make no
commitment to update or to keep current the information in this manual.
Printed in the United States of America.
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Safety Warnings
•This symbol denotes an important safety tip or warning.
Please read these instructions carefully before performing
any of the procedures contained in this manual.
•DO NOT INSTALL, REMOVE, OR REWIRE THIS
EQUIPMENT WITH POWER APPLIED. Have a qualified
electrical technician install, adjust and service this equipment.
Follow the National Electrical Code and all other applicable
electrical and safety codes, including the provisions of the
Occupational Safety and Health Act (OSHA), when installing
equipment.
•Reduce the chance of an electrical fire, shock, or explosion by
proper grounding, over-current protection, thermal protection,
and enclosure. Follow sound maintenance procedures.
It is possible for a drive to run at full speed as a result of
a component failure. Minarik strongly recommends the
installation of a master switch in the main power input of the
drive controllng the motor to stop the drive in an emergency.
Circuit potentials are at 115 VAC or 230 VAC above earth
ground. Avoid direct contact with the printed circuit board or
with circuit elements to prevent the risk of serious injury or
fatality. Use a non-metallic screwdriver for adjusting the
calibration trimpots. Use approved personal protective
equipment and insulated tools if working on this drive with
power applied.
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Specifications 1
Dimensions 3
Installation 5
Mounting ....................................................5
Wiring .......................................................6
Shielding guidelines . . . . . . . . . . . . . . . . . . . . . .....................7
Panel installation ..............................................8
DIP Switch Settings . . . . . ......................................12
Connections . ................................................13
Calibrating the speed control . . ...................................17
Programming Instructions 17
Programming Mode . . . . . ......................................18
DLC programming parameters ...................................18
Speed Scaling Factor ........................................19
Load Response Number . . ...................................21
Display Scaling Factor . ......................................23
Decimal point location . ......................................26
Exit the Programming Mode ...................................27
Troubleshooting 29
Before troubleshooting . . . . . . . . . . . . . . . . . . .......................29
Unconditional Warranty 33
Contents
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Figure 1. DLC300/400 Dimensions ...................................3
Figure 2. DIP Switch Location . . ....................................12
Figure 3. DLC300/400 connections . .................................15
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Illustrations
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Minarik Models DLC300 and DLC400 Digi-Lok® Converters are
used with conventional analog speed controls to produce closed-
loop digital systems capable of controlling motor speed precisely
and with excellent reproducibility.
The Digi-Lok® Converter (DLC) receives the feedback signal
generated by a sensor that monitors a rotating element driven by
the motor. The sensor assembly can be a magnetic pickup with
ferromagnetic gear, or a NPN-type optical encoder or inductive
proximity switch, or a Hall effect sensor with magnetic wheel.
An important distinction exists between any Digi-Lok®
Converter system and a conventional servo drive. The Digi-Lok
Converter reads a velocity-dependent feedback signal and corrects
its output to bring the motor back to its set speed. The Digi-Lok®
Converter will not compensate for any positioning errors caused
by very minor speed fluctuation.
Industrial applications for Digi-Lok® Converter control systems
include many within the food processing, chemical, and
pharmaceutical industries, for example. Blending, mixing,
grinding, pumping, and other such processes often require strict
repeatability to ensure product uniformity. The digital speed-
setting feature of the Digi-Lok® Converter and the closed-loop
design provide that reliability and reproducibility.
Introduction
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DLC Compatibility
The DLC is compatible with positive reference-voltage speed
controls only – controls that drive the motor when the speed
adjust pot wiper is at a positive potential relative to the CCW side
of the speed adjust pot.
With few exceptions, speed controls currently being manufactured
meet this requirement. A few older design speed control models,
including Minarik Models SL31UD4 and SL51UD4, operate with
a negative reference voltage. Such controls will require use of
Model DLC100 instead of the DLC300.
Feedback device selection
Acceptable feedback frequency at any set speed in an application
must lie within the 10-2000 Hz range. Feedback frequency is
directly proportional to the number of feedback pulses per
revolution (PPR) and to the speed of the shaft (RPM) that the
feedback transducer monitors.
Since the application requirements determine the shaft speed
range, they also will determine the range within which the
number of feedback pulses per revolution must lie:
PPRminimum = 600/(RPMminimum)
PPRmaximum = 120,000/(RPMmaximurn)
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As an example, consider an application in which the feedback
source is monitoring a driven shaft, and not the motor armature
shaft. This shaft is to be run at speeds as low as 1 rpm. The
feedback device that you select must produce at least 600 pulses
per revolution.
Conversely, if the application were one that required monitoring
and controlling a driven shaft at speeds as high as 4000 rpm, the
feedback device would be limited to one that produced 30 or
fewer pulses per revolution.
The Digi-Lok® Converter system can control armature shaft
speeds within a 30:1 range. Under no circumstances can the DLC
be expected to control motor speed beyond the speed rating of the
motor.
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Este manual sirve para los siguientes modelos
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