The economic analysis of PLC should be considered from the following aspects:
Comprehensive consideration of various factors affecting the cost From the current production equipment control device, there are three types: ①Relay control. ②Semiconductor device control. ③PLC control.
Price is only one factor in choosing a PLC brand, and reliability is another factor that needs to be considered when choosing.
Considering the length of the design and production cycle, whether it is the renovation of old equipment or the design of new production machinery and equipment, there is no doubt that the shorter the production and design cycle, the better, and even hope to design, install, debug and produce at the same time , especially for product upgrading and production process transformation, production can be organized immediately without changing the existing production equipment and its external wiring, which not only saves labor, but also new products can be put into the market as soon as possible. This undoubtedly adds vitality to the enterprise and improves economic efficiency. If these requirements can be realized, relays or semiconductors can not meet, but PLC can be realized completely. This is because if you use PLC, you don’t need to change the wiring of external devices, you just need to make a fuss on the software. That is to say, as long as the ladder diagram is changed, the new program can be re-input or the original program can be modified according to the new process requirements. This is both economical and simple, and can achieve the purpose of getting twice the result with half the effort.
As we all know, 75% of the production machinery and equipment in my country are currently controlled by relays. In addition to poor reliability, the design procedures are also very complicated. From the establishment of the scheme to the design of technical conditions and the design of construction, the workload of the drawings is very large, which will inevitably result in a long design cycle. The use of PLC control can greatly shorten the design cycle, and even some documents do not need to be drawn into a map. Designers can use the screen display on the programmer to input, or modify the program so that the ladder diagram can accurately reflect the production requirements. Programmers can also rewrite the program and store it in the EEPROM module according to the new process requirements of the new product for production. The program of which product needs to be processed can be called by the operator at any time, which is convenient, simple and confidential. The development of this kind of software is of great practical significance for optimizing the production process, improving the quantity and quality of products, and improving labor productivity. This alone is also welcomed by producers and designers.
GIDDINGS & LEWIS 502-03213-00 NSPP 5020321300
GIDDINGS & LEWIS 401-56489-00 NSPP 4015648900
GIDDINGS & LEWIS PIC900 PROGRAMMABLE INDUS. COMPUTER
Giddings Lewis Instruct 70 Drill Boring Milling Manual
Giddings & Lewis Models 3040 & 3045 Parts Manual
Giddings & Lewis PC-4 & 5 Instruction Manual
1970s Giddings Lewis Bore Tap Machine Parts Manual NN
1960s Giddings Lewis SS-70 Control Tool Catalog NN
1960s Giddings Lewis Basic Hydraulics Manual Machine NN
1970s Giddings Lewis 98815V Numericenter Tool Manual NN
1966 Giddings Lewis G Table Type Horizontal Manual NN
Giddings and Lewis 502-02824-00 MPX Triac Board
Giddings & Lewis 225-5613-003 Plate
Giddings & Lewis 226-5613-003 Turn
Giddings & Lewis M.1008.0297 MPX Triac Board – Used
GIDDINGS & LEWIS 27124 NSPP 27124
GIDDINGS & LEWIS 502-03200-00 USPP 5020320000
GIDDINGS & LEWIS 502-03201-00 USPP 5020320100
GIDDINGS & LEWIS 502-03212-00 USPP 5020321200
GIDDINGS & LEWIS 502-03213-00 USPP 5020321300