Technical Manual
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TABLE OF CONTENTS
MARION POWER SHOVEL DIVISION DRESSER INDUSTRIES, INC. ("MPSD")
1.0 Introduction
This manual contains component equipment descriptions, start-up procedures and maintenance information for the MPSD MARION Programmable System. This system is a programmable controller ("PC") based digital control system. The system has been designed for accuracy and dependability. Use of the PC makes the system extremely flexible and maintenance is enhanced by the PC's diagnostics capabilities. Not only does the PC perform self-diagnostics but peripheral device diagnostics as well. The System was originally designed to protect draglines against static and dynamic tightlining. Although its primary purpose is stil+ tight-line protection, many other features have been incorporated as a result of its flexibility. All control features performed by the system are covered in the following sections.
One of the primary advantages of the System is the ease with which it can be adjusted. Knowing when and how to readjust or make changes in the system 'is simply a matter of becoming familiar with the system, how it works and what its limitations are. This manual is intended to provide that knowledge.
Keep in mind that the system is basically a small computer that communicates to the outside world through input and output hardware signal conditioners(I/0 Racks and Cards). The way in which the output responds is controlled by software programs. All system hardware and software is operationally tested at the MPSD factory. The use of software allows the flexibility of custom modifications based on customer preference, with no hardware changes in most cases.
IMPORTANT NOTE!
This manual covers a standard System. Changes made to the standard system hardware and/or software to meet special customer requirements are documented in Section 11 of this manual. MODIFICATION SHEETS HAVE BEEN INSERTED IN SECTION 11, WHEN REQUIRED, THAT THOROUGHLY EXPLAIN ANY DEVIATIONS FROM THE STANDARD PROCEDURES. BEFORE ATTEMPTING ANY SET-UP OR ADJUSTMENTS, STUDY THESE MODIFICATION SHEETS AND NOTE THE PROCEDURES/SECTIONS THEY AFFECT.
Thoroughly read the entire contents of this manual before attempting to make any adjustments or changes. Alterations to the software program should never be attempted without advise from MPSD. In the event a software change is deemed desirable or in case of any question with respect to the System application or adjustments contact MPSD Customer Services Department.
IMPORTANT
A. The System, when properly adjusted and maintained, is designed to protect the dragline boom against dynamic tightlining under normal operation and under normal conditions based on certain pre-programmed line envelope definitions (or protective areas). THE SYSTEM SHOULD NOT BE CONSIDERED, NOR IS IT GUARANTEED TO BE, A FAIL SAFE DEVICE WHEN THE MACHINE IS USED SUBSTANTIALLY OUTSIDE NORMAL OPERATING CONDITIONS. AND IT SHOULD NOT BE USED AS A SUBSTITUTE FOR NOR¥,AL OPERATING PROCEDURES AND PRACTICES.
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