YOKOGAWA F3LR02-0N, Руководство пользователя

Страница: 174 / 210

C5-2
IM 34M06H45-01E 7th Edition : Aug.30, 2019-00
C5.2 Example of I/O Refresh Time Calculation
This example calculates the I/O refresh time for the following system configuration.
FC0521.VSD
F3LR02-1W
10 m
10 m
Subunit 1 Subunit 2
Main unit
Power
supply
module
Power
supply
module
Power
supply
module
Input: 32-point module x 2
Output: 32-point module x 1
Input: 32-point module x 3
Output: 32-point module x 2
Figure C5.1 An Example of I/O Refresh Time Calculation (for F3SP28/38/53/58/59/66/67)
Step 1
Calculate the ‘time dependant on transmission distance’
μs
0.2
(m) 100
(m) 10) (10
μs
1.0


 
Step 2 Calculate th
e ‘number of modules, converted to 16-point basis’
- Read Input = 32 points × 5
→
2×5 = 10
- Write Output = 32 points × 3
→
2×3 = 6
Step 3 Calculate the total time

μs
183.2 e RefreshTim I/O
μs
91.2 6 )
μs
0.2
μs
15 ( access output Write
μs
92 10 )
μs
0.2
μs
9 ( access input Read

    
   