Memory bits used in siemens s7 language

[sudhiraggarwal1980]

hello friends

i wan't to know about memory bits used in s7 language.what are they.what they used for.pls explain with 1 or 2 examples.

 

[girevik]

Not sure if i do understand your question right...

Memory bits (merkers) are used to hold boolean value i.e. 0 or 1.

you can use them as MX.Y where X is a byte number and Y is a bit number (withing byte X)

you can imagine them as a internal relays or so...

you can change more than one bit at a time, for example, writting a value to mb1 would change all 8 bits in the mb1.

 

[JIMCON]

hello.. Do you want to know what a memorybit is generally or ? Do you know what a memorybit is ? Cause its the same in all PLC´s

 

[Wino]

Why don't you just type the question exactly the way your instructor posed it to you?

 

[girevik]

here are 2 examples you asked for.

1)AND operation with memory bits (m1.3=m1.1 and m1.2)
2)OR operation with memory bits (m1.6=m1.4 or m1.5)

 

[PLucas]

Why don't you just type the question exactly the way your instructor posed it to you?

Don,

I think he did....

what are they.what they used for.pls explain with 1 or 2 examples

Paul