Installation manual

Publication 1747-RM001G-EN-P - November 2008
Memory Usage C-5
Fixed Controller Memory Usage Example
L20B Fixed I/O Controller
42 XIC and XIO 42 x 1.00 = 42.00
10 OTE instructions 10 x 0.75 = 7.50
10 TON instructions 10 x 1.00 = 10.00
1 CTU instruction 1 x 1.00 = 1.00
1 RES instruction 1 x 1.00 = 1.00
Instruction Usage 61.50
21 rungs 21 x 0.375 = 7.87
37 data words 37 x 0.250 = 9.25
User Program Total 78.62
2 I/O data words 2 x 0.75 = 1.50
1 slot 1 x 0.75 = 0.75
Overhead 65.00
I/O Configuration Total 67.25
Estimated total memory usage: 145.87
(round to 146)
1024 - 146 = 878 instruction words remaining in the processor