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FX3S/FX3G/FX3GC/FX3U/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
B Instruction Execution Time
B-6 Execution Time on Combination of Applicable Devices and Indexing
Appendix B-6 Execution Time on Combination of Applicable Devices and
Indexing
In examples shown below for basic instructions, the MOV instruction and data comparison instructions, the instruction
execution time varies depending on the combination of target devices and absence/presence of indexing.
The combinations of target devices marked with "*1" and "*2" are handled as exceptions because high-speed
processing is adopted in the technique.
Appendix B-6-1 Basic instruction (LD/LDI/AND/ANI/OR/ORI) execution time
•FX3U/FX3UC PLCs
•FX
3S/FX3G/FX3GC PLCs do not support indexing of bit devices and contact instructions with bit specification of word
devices in basic instructions.
Appendix B-6-2 Applied instruction execution time
1. MOV (FNC 12) instruction execution time
•FX3S PLC
- MOV instruction (16-bit operation)
*1. When K4 is specified, and the head bit device number is a multiple of 8 (K4M0, K4M8 ...)
- DMOV instruction (32-bit instruction)
*1. When K8 is specified, and the head bit device number is a multiple of 8 (K8M0, K8M8 ...)
Specified device type Condition Instruction execution time (µs)
Bit device
Without indexing 0.065
With indexing 11.9
Word device Bit specification 8.8
Command
contact
S (source)
D (destination)
Without indexing (µs) With indexing (µs)
KnY,KnM,KnS
*1
T,C,D
KnY,KnM,KnS
T,C,D
ON
KnX,KnY,KnM,KnS
*1
0.64 0.72 14.68 8.28
T,C,D 0.88 0.84 13.08 6.68
K,H 0.48 0.52 12.28 5.78
OFF
KnX,KnY,KnM,KnS
*1
0.36 0.58
T,C,D
K,H
Command
contact
S (source)
D (destination)
Without indexing (µs) With indexing (µs)
KnY,KnM,KnS
*1
T,C,D
KnY,KnM,KnS
T,C,D
ON
KnX,KnY,KnM,KnS
*1
0.68 0.88 19.48 8.68
T,C,D 1.24 1.04 18.18 7.28
K,H 0.56 0.56 17.18 6.28
OFF
KnX,KnY,KnM,KnS
*1
0.4 0.58
T,C,D
K,H