Rockwell Automation 1785-LTx,D17856.2.1 Classic PLC-5 Programmable Controllers Users Manual User Manual
Page 129
Calculating Program Timing
Chapter 9
9-12
Category
Words of
Memory
1
Time (
µ
s)
Integer or
Floating Point
False
Time (
µ
s)
Floating point
True
Time (
µ
s)
Integer
True
Title
Code
File
COP
copy
88 + 2.7W
104 + 3.8W
20
4Ć7
File
COP
copy
counter, timer, and control
88 + 2.7W
98 + 5.8W
104 + 3.8W
20
4 7
FLL
fill
81 + 2/.1 W
100 + 3.1W
15
counter, timer, and control 97 + 4.4W
Shift Register
BSL
bit shift left
74 + 3.4W
57
BSR
bit shift right
78 + 3.0W
FFL
FIFO load
54
44
FFU
FIFO unload
68 + 3.2W
46
Diagnostic
FBC
file bit compare
6Ć11
0 mismatch
75 + 6W
31
1 mismatch
130 + 6W
2 mismatches
151 + 6W
DDT
diagnostic detect
0 mismatch
71 + 6W
31
1 mismatch
150 + 6W
2 mismatches
161 + 6W
Zone Control
MCR
master control
12
18
1
Immediate I/O
IIN
immediate input
2Ć3
local
196
16
remote
204
IOT
immediate output
local
202
16
remote
166
Sequencer
SQI
sequencer input
57
14
5Ć9
SQL
sequencer load
55
42
4Ć7
SQO
sequencer output
77
42
5Ć9
Jump and Subroutine
JMP
jump
45
15
2Ć3
JSR
jump to subroutine
SBR
0 parameters
56
15
2Ć3
1 parameter
91
3Ć5
add per parameter
21
RET
return from sub.
0 parameters
48
13
1
1 parameter
70
2Ć3
add per parameter
21
LBL
label
12
12
3
W = number of elements acted on per scan
1
Use the smaller number if all addresses are below word 4096; use the larger number if all addresses are above 4096.