Rockwell Automation 1772-L8_LW_LWP_LX_LXP,D17726.5.8 User Manual User Manual
Page 124
Scan Theory
Chapter 8
8-6
Table 8.A (continued)
These Are the Approximate Execution Time Per Scan (in average
microseconds) and Words Per Scan for Each Instruction
Instruction
Instruction Name
Symbol
True
average
µ
sec.
False average
µ
sec.
Words Per
Instruction
10x
Master Control Reset
Zone Control Last State
Branch Start
Branch End
End, Temporary End
Subroutine Area
Immediate Input Update
Immediate Output Update
EAF 37
-(MCR)-
-(ZCL)-
T. END
SBR
-[I]-
-(IOT)-
685
7
12
8
8
11
*
62
67
30
7
8
6
10
8
13
-
9
3
1
1
1
1
1
1
1
1
Label
Return
Jump to Subroutine
Jump
Block Transfer Read
Block Transfer Write
Sequencer Output
Sequence input
Sequencer Load
FileĆToĆFile Move
WordĆToĆFile Move
FileĆToĆWord Move
LBL
-(RET)-
-(JSR)-
-(JMP)-
SEQ 0
SEQ 1
SEQ 2
FILE 10
FILE 11
FILE 12
17
*
*
34
54
54
343
418
283
291
153
153
-
0
9
10
52
52
72
36
69
60
49
49
1
1
1
1
2
2
5
5
4
5
4
4
add 1 word per instruction when its address is 400
8
or greater
add 2 words per instruction when its address is 400
8
or greater
1 word
999 words
1 bit
999 bits
with 2 data values
with 10 data values
with 50 data values
add 8
µ
s per instruction when its address is 400
8
or greater
add 16
µ
s per instruction when its address is 400
8
or greater
1
2
3
4
5
6
7
8
9
10
11
* = combined execution time - 79
µ
s