Description of Operation
Section
3-2
103
Actual measured load rate value
The actual measured load rate value is as follows according to the number of
control loops and number of Step Ladder Program commands under the
above conditions.
The actual measured load rate values at an operation cycle of one second
are as follows:
Number of step ladder program
commands
Number of
loops
0
200
1000
1
2%
6%
24%
2
2%
6%
24%
4
3%
7%
25%
8
6%
10%
28%
16
10%
14%
32%
32
21%
25%
43%
Note
The load rate value at an operation cycle other than one second becomes the
value obtained by converting by the operation cycle ratio according to the
above calculation formula (for example, twice that of the 1-second operation
cycle at an operation cycle of 0.5 seconds).
Restrictions in the number of usable loops
The relationship between the number of loops and operation cycle is
restricted in a fixed manner as the load rate must be 60% or less.
In most cases, the number of loops is as follows when a Step Ladder
Program is not used:
Operation cycle
Number of loops
0.1 sec.
Max. 8
0.2 sec.
Max. 16
0.5 sec.
1 sec.
2 sec.
Max. 32
2) When mixed operation cycles are used
Procedure 1: For each operation cycle, the total operation execution
time (ms)
1
of each function block is calculated by the
formula in the table below.
1 The total operation execution time of each function block is operation
execution time of function block + sequence command execution
time.
Where
Total operation execution time of function block at 0.1 sec operation cycle
(ms) + 10 ms = T1,
Total operation execution time of function block at 0.2 sec operation cycle
(ms) + 10 ms = T2,
