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Number of Function Block Program Steps and Instance Execution Time
Section 2-9
The following table shows the length of time for A, B, and C.
Example: CJ1H-CPU67H-R
Input variables with a 1-word data type (INT): 3
Output variables with a 1-word data type (INT): 2
Total instruction processing time in function block definition section: 10 µs
Execution time for 1 instance = 3.3 µs + (3 + 2) × 0.19 µs + 10 µs = 14.25 µs
Note The execution time is increased according to the number of multiple instances
when the same function block definition has been copied to multiple locations.
Operation CPU Unit model
CJ1H-
CPU6@H-R
CJ2H-
CPU6@(-EIP)
CS1H-
CPU6@H
CJ1H-
CPU6@H
CS1G-
CPU4@H
CJ1G-
CPU4@H
NSJ
CJ1M-CPU@@
CP1H-X@@@-@
CP1H-XA@@@-@
CP1H-Y@@@-@
CP1L-M@@@-@
CP1L-L@@@-@
A Startup time Startup time not including
I/O parameter transfer
3.3 µs6.8 µs8.8 µs 15.0 µs
B I/O parameter trans-
fer processing time
The data type is
indicated in paren-
theses.
1-bit input variable, out-
put variable, or input-out-
put variable (BOOL)
0.24 µs0.4 µs0.7 µs1.0 µs
1-word input variable,
output variable, or input-
output variable (INT,
UINT, WORD)
0.19 µs0.3 µs0.6 µs0.8 µs
2-word input variable,
output variable, or input-
output variable (DINT,
UDINT, DWORD, REAL)
0.19 µs0.5 µs0.8 µs1.1 µs
4-word input variable,
output variable, or input-
output variable (LINT,
ULINT, LWORD, LREAL)
0.38 µs1.0 µs1.6 µs2.2 µs
C Function block defi-
nition instruction
execution time
Total instruction processing time (same as standard user program)
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