Appendix B-6 Execution Time On Combination Of Applicable Devices And Indexing; Appendix B-6-1 Basic Instruction (Ld/Ldi/And/Ani/Or/Ori) Execution Time; Appendix B-6-2 Applied Instruction Execution Time - Mitsubishi Electric MELSEC FX3U Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
Appendix B-6 Execution Time on Combination of Applicable Devices and
Indexing
In examples shown below for basic instructions, 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

• FX /FX
3U 3UC
Specified device type
Bit device
Word device
• FX PLCs do not support indexing of bit devices and contact instructions with bit specification of word
3G
devices in basic instructions.

Appendix B-6-2 Applied instruction execution time

1. MOV (FNC 12) instruction execution time
• FX /FX
3U 3UC
- MOV instruction (16-bit operation)
Command
S (source)
contact
KnX,KnY,KnM,KnS
T,C,D
R
ON
*2
U \G
K,H
KnX,KnY,KnM,KnS
T,C,D
R
OFF
*2
U \G
K,H
*1. These combinations are handled as exceptions because high speed processing is adopted in the
technique.
*2. When the instruction is executed for a BFM in a special extension block/unit for FX
982
PLCs
Without indexing
With indexing
Bit specification
PLCs
Without indexing (µs)
KnY,KnM,KnS
15.5
12.1
13.8
131.8
12.5
B-6 Execution Time on Combination of Applicable Devices and Indexing
Condition
D (destination)
*2
T,C,D R
U \G
12.1 13.8 212.9
*1
10.4 209.7
0.64
10.4 12.1 211.3
128.5 130.2 377.9
*1
10.8 210.1
0.64
*1
0.32
*1
0.32
B Instruction Execution Time
Instruction execution time
0.065
11.9
8.8
With indexing (µs)
KnY,KnM,KnS T,C,D
18.6 16.6 16.9
16.6 14.5 14.8
16.9 14.8 15.1
133.1 129.9 131.5
15.4 13.3 13.6
0.325
/FX
3U
*2
R
U \G
214.7
212.8
213.1
379.4
211.6
Series.
3UC