SapherJalt
Member
Siemens S7-300
Hello! i'm new in PLC and have some questions.
1 question.
How i can read this:
L DW#16#84000000
Decimal number unsigned.
Can, someone, explain it across bits?
for example:
1111 0000 0101 0101 0001 1110 1100 0010 - this style
And this:
L2# *bit combination*
L# 103
2 question.
L P#0.0
T MW 20
A m0.0
L mw 20
+ 2
T mw20
Why not increase during the cycle?
3 question.
How many loops i can use with LOOP:*marker*
Where i can find math for measuring?
4 question.
In FB, first command is
= L 96.1
L DIW [AR2,P#14.0]
T LW 98
But the sytem data of FB (Input/OutPut/In_Out/Stat/Temp) have no adress of memory more than 96.
For exmple:
The max adress in TEMP is 94.0 with length 2 bytes -> 96 bytes.
Where i can find 96.1? 98? Or we use it just for saving temp values and will use it later? (just for storage)
Also, i don't see the mention about this local data in Reference data. Just see that the max length of the FB is 140 bytes
L DIW[AR2,P#14.0] how i can recognize this?
I have no direct declaration for start adress in AR2.
Or it's just pointer which shows that we load in ACCU1 the DI(numer of DI).W14.0? But what the numer of DI?
As i see from the book about inderect adressing:
L P#M0.0 //Load ACCU1 with pointer value
LAR1 //Load AR1 with pointer in ACCU1
L W [AR1, P#10.0] //Load the word whose address is determined by the contents of AR1 plus 10 bytes (MW10) into ACCU1
here i see that we load L P#M0.0 in Accu1, then we load in AR1.
But where i can find or recognize the loaded pointer value for AR2?
remeber the code:
= L 96.1
L DIW [AR2,P#14.0]
T LW 98
TAK
OPN DB [LW 98]
L DID [AR2,P#16.0]
LAR1
TAK
L D [AR1,P#0.0]
T #temp_status.PV
L DIW [AR2,P#14.0]
T LW 98
TAK
Help, pls!
Hello! i'm new in PLC and have some questions.
1 question.
How i can read this:
L DW#16#84000000
Decimal number unsigned.
Can, someone, explain it across bits?
for example:
1111 0000 0101 0101 0001 1110 1100 0010 - this style
And this:
L2# *bit combination*
L# 103
2 question.
L P#0.0
T MW 20
A m0.0
L mw 20
+ 2
T mw20
Why not increase during the cycle?
3 question.
How many loops i can use with LOOP:*marker*
Where i can find math for measuring?
4 question.
In FB, first command is
= L 96.1
L DIW [AR2,P#14.0]
T LW 98
But the sytem data of FB (Input/OutPut/In_Out/Stat/Temp) have no adress of memory more than 96.
For exmple:
The max adress in TEMP is 94.0 with length 2 bytes -> 96 bytes.
Where i can find 96.1? 98? Or we use it just for saving temp values and will use it later? (just for storage)
Also, i don't see the mention about this local data in Reference data. Just see that the max length of the FB is 140 bytes
L DIW[AR2,P#14.0] how i can recognize this?
I have no direct declaration for start adress in AR2.
Or it's just pointer which shows that we load in ACCU1 the DI(numer of DI).W14.0? But what the numer of DI?
As i see from the book about inderect adressing:
L P#M0.0 //Load ACCU1 with pointer value
LAR1 //Load AR1 with pointer in ACCU1
L W [AR1, P#10.0] //Load the word whose address is determined by the contents of AR1 plus 10 bytes (MW10) into ACCU1
here i see that we load L P#M0.0 in Accu1, then we load in AR1.
But where i can find or recognize the loaded pointer value for AR2?
remeber the code:
= L 96.1
L DIW [AR2,P#14.0]
T LW 98
TAK
OPN DB [LW 98]
L DID [AR2,P#16.0]
LAR1
TAK
L D [AR1,P#0.0]
T #temp_status.PV
L DIW [AR2,P#14.0]
T LW 98
TAK
Help, pls!
Last edited:
