http://www.chipkin.com/articles Resources and News for industrial automation Fri, 03 Jul 2009 23:23:58 +0000 http://backend.userland.com/rss092 en Assigining your articles to corresponding categories is very important for helping your visitors navigate your MediaWiki site with ease. Thankfully, MediaWiki comes with an included system for handling categories. To add an article to a category: Simply edit the article you want to add to the category, and add the following line ... http://www.chipkin.com/articles/how-to-add-a-mediawiki-article-to-a-category There is a common issue when posting from Word into the Wordpress editor which causes problems when trying to view the article using the Internet Explorer browser (it simply won't display). The reason behind this is because Word uses some unstandardized tags for its formatting, and those tags are not recognized by IE. Quick Fix ... http://www.chipkin.com/articles/pasting-from-word-into-wordpress-paste-from-word When a Client Node on the FieldServer goes offline the corresponding data objects on the FieldServer are also marked offline. If a client polls a virtual FieldServer node for this particular data, an offline response will be returned by the FieldServer. If the client then requests the FieldServer to identify ... http://www.chipkin.com/articles/node-offline-responses Normally a FieldServer sends a poll request to a Server device and that device gives a response back to the FieldServer. Following are the timing parameters considered important in the fieldserver’s operation:   Scan_interval: It is the amount of time between successive poll requests. Its default value is 2 seconds and it ... http://www.chipkin.com/articles/timing-parameters Earlier, WordPress.com used only categories and no tags. A tag is a new breed of search engine optimization i.e. SEO. Tags are fundamentally keywords for each page or article created by us. It is a non-hierarchical keyword or term assigned to a piece of information such as an internet bookmark, ... http://www.chipkin.com/articles/tags-vs-categories This diagram shows how to connect a FieldServer FS20 series to an ICD102A optical isolator using a 2-wire RS 485 connection. FieldServer’s only support 2 wire connections. Datasheet for the Black Box RS485 Isolator/Repeater can be found here: Blackbox Network  Services http://www.chipkin.com/articles/fieldserver-485-connection-diagram-to-isolator-icd102a-black-box PageRank is a link analysis algorithm used by the Google Internet search engine that assigns a numerical weighting to each element of a hyperlinked set of documents, such as the World Wide Web. The purpose behind this is to measure the relative importance of the element within the set. It ... http://www.chipkin.com/articles/google-page-rank AdWords is Google's flagship advertising product and main source of revenue. AdWords offers pay-per-click (PPC) advertising, and site-targeted advertising for both text and banner ads. The AdWords program consists of local, national, and international distribution. Google's text advertisements are short and contain one title line and two content text ... http://www.chipkin.com/articles/google-adwords RS485 defines the physical layer of the network. You may use it as you want. However, since the trunk is shared it is important that no two (or more) devices talk at the same time. If they do this will produce collisions and the corruption of both messages. The following applies ... http://www.chipkin.com/articles/rs485-networks-multiple-protocols First - a simple question   Right or Wrong? Power = Voltage x Current That statement is correct for DC systems but there are two major complications for AC systems. The value of current and voltage keeps changing. Which value do you use ? The voltage and the current may not be in phase. ... http://www.chipkin.com/articles/get-to-know-your-power-meter-what-is-real-apparent-and-reactive-power