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Foundation Fieldbus Technology(3)
By : Nwadiugwu Williams P
Date : 2017-05-09
Views : 316

Control Strategy

Standard Function Blocks is used to implement the Control Strategy.
Many control system functions such as AI, PID and AO can be performed by the field device through the use of these Standard Function Blocks.
Distribution of control into field devices can reduce the amount of hardware and cabinet footprint needed.

Fieldbus Cable

Recommended:-Shielded, twisted-pair cable, designed to a specific impedance to reduce signal reflections and maximize network length
The Fieldbus Foundation has a Cable Specification (FF-844) so look for cable with a check mark

Cable Design -----> Shielded, twisted pair
Conductor Cross Section -----> 0.8 mm 18AWG
Loop Resistance -----> (DC current) 44/km
Impedance -----> @31.25kHz 100 20%
Segment Length (including Spur Length) -----> 1900 m
(Total:31 articles / page:1/4 )
No. Subject By Date Views
31  Foundation Field-bus Technology(Learning and training .. Nwadiugwu Williams P 2017-09-04 132
30  Foundation Fieldbus Technology(9) williams N 2017-07-10 238
29  Foundation Fieldbus Technology(8) Nwadiugwu Williams P 2017-07-03 256
28  Foundation Fieldbus Technology(7) Nwadiugwu Williams P 2017-06-26 245
27  Foundation Fieldbus Technology(6) Nwadiugwu Williams P 2017-06-19 246
26  Foundation Fieldbus Technology(5) Nwadiugwu Williams P 2017-06-19 280
25  Foundation Fieldbus Technology(4) Nwadiugwu Williams P 2017-06-19 280
24  Foundation Fieldbus Technology(3) Nwadiugwu Williams P 2017-05-09 316
23  Foundation Fieldbus Technology(2) Nwadiugwu Williams P 2017-05-01 321
22  Foundation Fieldbus Technology Nwadiugwu Williams P 2017-04-24 337