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Hello in this video.
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We are going to learn.
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plc special symbols, X physical inputs contacts and Y physical output contacts are coded according
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to 8 octal counting system.
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It's a general purpose information table.
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This is on the table values are prepared according to DVP SV2 to series plc model and table values
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differs according to plc models.
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And in here type X is value range from starting 0 to till 377 and it is also included.
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And if you are using in your Plc projects that means you are using physical inputs contact.
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And if you are using Y , you are using in your project physical output.
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If you are using M , M is internal bit marker, S means step contact and if you are using T and C, T means
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timer and the value ranges starting from 0 to 255 and C means counter and starting from 0 to 255.
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So D ,data registers, it is included in here special data registers and also remained data register
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and also normal erasable(not remained) after the power off and power on the plc the data register's value will be 0 than
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normal data registers and completely all of them is included in here and you can see eleven thousand
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nine hundred ninety nine.
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The and the starting from zero and E and F means index registers and
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For example if you are using in your plc projects E1 or F5 that means you are using index registers
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in your plc project and the important thing X and Y's are eight octal counting system.
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So for example after you used X7 you cannot continue to X8,
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It will go to directly X ten etc.
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So this is the really important thing that you notice and that you know.
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So for this video I'm finished here.
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See you in the next video.