1. General
The MICROCONTROL controls of the DÜRKOPP ADLER 743-221
include the integrated comprehensive MULTITEST testing and
monitoring system.
A microcomputer assumes the control tasks, monitors the sewing
process and signals operating faults and malfunctions.
Special programs facilitate mechanical adjustments and make
possible a rapid testing of the input and output elements without
additional measuring apparatus.
Errors and test results are shown in a 2 x 16 digit display.
Under normal working conditions the display shows information to
operation and the sewing process.
When an operating error or malfunction occurs the functions are
interrupted. The cause is shown in the display by the appropriate error
symbol. In most cases the error symbol will disappear when the cause
of the fault has been remedied.
In some cases the main switch must be turned off during error
correction for safety reasons.
A portion of the error messages are meant only for the service
personnel.
All functions can be called up and changed by pressing the
appropriate key. The unit must be in its initial position for this.
When the unit is switched on the controls conduct several
comprehensive self-tests. Among other things the program and data
memories and the display are checked for flawless operation at this
time.
After the machine is switched off the set values of the individual
functions are stored in the program and data memories (battery
buffered) and automatically activated when switched on again.
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Summary of Contents for class 743-221
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