Publication 1747-RM001G-EN-P - November 2008
C-6 Memory Usage
SLC 5/01 Processor Memory Usage Example
1747-L514 processor, 30-slot configuration, (15) 1746-IA16, (10) 1746-OA8, (1)
1747-DCM full configuration, (1) 1746-NI4, (1) 1746-NIO4I
50 XIC and XIO 50 x 1.00 = 50.00
15 OTE instructions 15 x 0.75 = 11.25
5 TON instructions 5 x 1.00 = 5.00
3 GRT instructions 3 x 1.50 = 4.50
1 SCL instruction 1 x 1.75 = 1.75
1 TOD instruction 1 x 1.00 = 1.00
3 MOV instructions 3 x 1.50 = 4.50
10 CTU instructions 10 x 1.00 = 10.00
10 RES instructions 10 x 1.00 = 10.00
Instruction Usage 98.00
30 rungs 30 x 0.375 = 11.25
10
0
data words 100 x 0.250 = 25.00
10 is highest data table file number 10 x 1.00 = 10.00
4 is highest program file number 4 x 2.00 = 8.00
User Program Total 163.50
49 I/O data words 49 x 0.75 = 36.75
30 slot 30 x 0.75 = 22.50
Overhead 67.00
I/O Configuration Total 126.25
Estimated total memory usage: 289.75
(round to
290)
4096 - 290 = 3806 instruction words remaining in the processor
To Next Page
Loading...
