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4-8 Field Control™ Genius® Bus Interface Unit User’s Manual
–
October 1999 GFK-0825F
4
Example 2:
Five modules, one Group Data Move. Genius bus speed is 26mS.
Slot Module Data per Module Time per
word / byte
Total Time
in mS
1 Conventional analog output module 4 words AQ .500 2.00
2 Conventional analog input module 8 words AI .500 4.00
3 Conventional discrete output module 2 bytes Q .150 0.30
4 Conventional discrete input module 2 bytes I .150 0.30
5 16-Point Grouped Analog Input
Module (IC670ALG240)
16 words AI .150 2.40
11 bytes I .090 0.99
2 bytes Q .090 0.18
+ number of modules ( 5 ) .500 2.50
= Total I/O 12.67
12.67 X ( 0.8 X ( 2.25 / 26 mS ) ) 11.23 mS
+ Groups 64 bytes: Internal BIU
table move
0.96
+ Micro Field Processor (none) 0.00
+ 1.00
Estimated backplane scan time 13.19 mS