Toshiba LC531 Series Instruction Manual page 64

Chapter 3 Software Functions
For example, if the following programs are created and downloaded at once, 34
blocks of code memory will be occupied.
Number of blocks: The result of Number of Steps/16 is rounded up.
When a program is changed online, the controller finds consecutive free blocks
of the size that can store the program, and downloads the program there. After
that, the controller releases the previously used blocks as free blocks. However,
a program cannot be downloaded online if free blocks of the size that can store
the program cannot be found. In that case, stop operation, and perform batch
download to download the program.
44
6F8C1388
Program
Main Scan Task Entry 0
Program 0
Main Scan Task Entry 1
Program 1
Main Scan Task Entry 2
Program 2
Main Scan Task Entry 3
Program 3
Main Scan Task Entry 4
Program 4
Main Scan Task Entry 5
Program 5
Main Scan Task Entry 6
Program 6
Main Scan Task Entry 7
Program 7
Total
0 1
0 MS_0 P_0
MS_3
1
2 MS_5
P_4
P_6
3
4 P_7
47
Figure 3-2 An example of program DL
MS_0
P_0
MS_1
P_1
MS_2
P_2
MS_3
P_3
MS_4
P_4
MS_5
P_5
MS_6
P_6
MS_7
P_7
Code memory map
2 3 4 5
MS_1 P_1 MS_2
P_3
MS_4
P_5
MS_7
Free
Number of Number of
steps blocks
3 1
10 1
3 1
20 2
3 1
30 2
3 1
40 3
3 1
50 4
3 1
60 4
3 1
70 5
3 1
80 5
384 34
6 7
P_2
P_4
MS_6
P_7
1 block