Hello in this video. 1
We are going to learn. 2
plc special symbols, X physical inputs contacts and Y physical output contacts are coded according 3
to 8 octal counting system. 4
It's a general purpose information table. 5
This is on the table values are prepared according to DVP SV2 to series plc model and table values 6
differs according to plc models. 7
And in here type X is value range from starting 0 to till 377 and it is also included. 8
And if you are using in your Plc projects that means you are using physical inputs contact. 9
And if you are using Y , you are using in your project physical output. 10
If you are using M , M is internal bit marker, S means step contact and if you are using T and C, T means 11
timer and the value ranges starting from 0 to 255 and C means counter and starting from 0 to 255. 12
So D ,data registers, it is included in here special data registers and also remained data register 13
and also normal erasable(not remained) after the power off and power on the plc the data register's value will be 0 than 14
normal data registers and completely all of them is included in here and you can see eleven thousand 15
nine hundred ninety nine. 16
The and the starting from zero and E and F means index registers and 17
For example if you are using in your plc projects E1 or F5 that means you are using index registers 18
in your plc project and the important thing X and Y's are eight octal counting system. 19
So for example after you used X7 you cannot continue to X8, 20
It will go to directly X ten etc. 21
So this is the really important thing that you notice and that you know. 22
So for this video I'm finished here. 23
See you in the next video.