Rockwell Automation 1772-LP3 PLC - 2/30 Programmable Controller Programming and Operations Manual - Manual (Page 117)

Timer and Counter Instructions
Chapter 5
5Ć19
Figure 5.13
Program for Determining Average Scan Time
( CTU )
050
PR 999
AC 000
ą ( CTU )
050
PR 999
AC 000
| / |
14
( RTO )
050 051
Branch End Instruction
|ą|
14
( : )
050 Store 3
|ą|
14
( RTR )
050 051
PR 999
AC 000
|ą|
14
( CTR )
050 050
PR 999
AC 000
1
2
3
4
5
6
| G |
xxx
051
| G |
010
Store 1
0.1
PR 999
AC xxx
xxx
( : )
Store 2
xxx •
To enable the programmer to estimate the scan time a proposed program
may require, the average execution times required for PLC-2/30
instructions are presented in Tables 5.D through 5.G.
Table 5.D contains average execution times for instructions.
5.6
Instruction Execution Time
5.6.1
Relay Type, Timer and
Counter, Data
Manipulations, Arithmetic,
Output Override and I/O
Update, Jump, and
Subroutine Instructions