Master in anticipation of joining pills continuously, with a periodicity generates a pulse RESET (reset). Taking this signal, the key is waiting for its completion and gives an impulse PRESENCE (presence) of a certain duration. If the signal is too long PRESENCE, the intercom system understands that this is a short closure, and remained silent. Otherwise, the master device waits for some time and gives a command to read the ROM, it's usually the family code, in this case 33H. Notice how the transfer is made zero and one. In any case, pulse "drops" on the ground, but if one is passed, then he recovers quickly (it takes about 1 microsecond). If, however, must be zero, the momentum for some time "hanging" on the ground, then back again to one.
This is to ensure that the passive device continually replenish the energy of the capacitor, and on it was food. Next intercom stand for a while and starts to generate pulses of receiving information, only 64 of the pulse (ie there takes 64 bits of information). The key must only match the correct length. If the tablet wants to transmit a zero, it holds the bus for some time at zero, if not, then just silence. Everything else for it does intercom.
The foregoing describes the general work interphone key. Our key works on the same principle. It laid down certain information that is read by an intercom. Then the intercom system compares this information to key with her, which is embedded in the memory controller intercom. If it matches, then the door opens. In this way laid the information that displays the symbols of an empty memory intercom, as well as in almost every intercom is free memory, and verification of information missing key intercom as his own, then otkryvaemost our key accounts for about 90%. This operation performs the intercom system in 1 – 2 seconds slower than the reading of his original keys. Please note that the principle of universal key is independent of the city where you're from and intercom company that installs and maintains intercoms. A lot of people think that key to tablet is a standard intercom small magnet, which when in contact with a reader to open the door intercom. It is not so! In fact, the tablet is a hard-wired ROM key. This memory called Touch Memory. Pill "communicates" with the intercom on the bus One-wire (single-wire interface). This bus was developed by Dallas, it allows you to talk to two or more devices of a single wire. If the device is passive (as in our case), it is also transmitted on the bus and power over a single wire. In addition to the memory of the key (pill) is a 60 pF capacitor, which provides short-term power at the time of response. The master must continually generate a signal unit for charging this capacitor to the ROM in the tablet continued to eat. Rejecting all these arcane terms, we can say simply: everything you need to run the device, transmitted only by a single wire. By the way, that the 1-Wire bus has proved so successful that it held on industrial networks, including in our country.
Lifting technique, an often underrated discipline your importance to the functioning of the economy, but also its importance for the general social life is often underestimated: lifting technology surrounds us every day and is the ministering spirit to do worry, as long as everything works smoothly but often. But the attention is greater if the technique once not one hundred percent. It starts with relatively simple cases out. An elevator which gets stuck is not a big deal, but who perhaps several hours trapped in the cabin at the first glance, will be there disagree. The effects are greater when hoisting technology of large caliber failed. This enough, when due to a system failure causes, that on a container port problem. The resulting chaos grows dramatically within a short time. Modern production methods that to calculate the travel times of the materials to be delivered, are today no longer indispensable from the industry.
Therefore, losses grow at the freight with the speed of a chain reaction to really serious problems out. So it is no wonder if really all that can be done so that it does not. In addition to the regular maintenance of all systems of the lifting equipment is therefore also a lifecycle management, as well as a redundancy planning of all major core systems to recommend. Cycle management holding for each wearing part, at which time it was put into operation, how long is its estimated operating time, and when it must be replaced as a precaution. Feedback flow also from repairs and maintenance to keep the predictions about the lifetime of the individual components. The redundancy planning determines which systems in the event of a failure must be multiple and how in the case as quickly as possible the reserve can be installed for use. In the example above container port for example the use of a replacement crane could be the failure of a crane plan. Since redundancy and equally expensive failures it applies here carefully to weigh.
The key to all successful website is the maximum quality content are sites where we hope to make money from adsense or any affiliate program. Many webmaster have focused on generating revenue with adsense, use items on other people to build sites of different thematic in a very short time, instead of creating their own content, this is understandable because they write content for web paguina time consuming . While this is a practice allowed in the long run original content and only won about duplicate content … But why? Consider the difference … A related site: Leslie Moonves mentions similar findings. is that original content is written by a person for their website or, failing that is only used by a small group of people. While duplicate content is used by tens, hundreds or perhaps thousands of people, as happens with the items "stuck" in different articles directories, which can be copied and used by anyone in any website. There is fear in some webmaster about using duplicate content on your website, it is assumed that Search engines penalize the use of these articles, whether they consider your site and make them irrelevant to the end of search results or your site will definitely be banned, ie busquea engine (like Google) that erased site and its database so that site will never be found when users conduct their searches. Personally, I think this fear is exaggerated, I do not think Google decided to ban everyone using duplicate content, if so, would have to start with the big news sites content which accuse each other. Heather Bresch addresses the importance of the matter here.