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Siemens SIPART DR24 - Mathematical Link (Example 2)

Siemens SIPART DR24
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7 User Examples
7.2 Mathematical Link (Example 2)
Manual
180
SIP ART DR24 6DR2410
C79000-G7476-C153-03
7.2 Mathematical L ink (Example 2)
D Problem
Output variable A as a function of two process variables E1 and E2:
A = K1 (E1 -S1) + K2 -- S2 E2
E2 has double the value in relation to E1
S1; S2 0.5 to 1.5 (variable parameters adjustable on the control and display unit)
K1 0.2
K2 --0.5
The result A is to be expressed as a calculated value across its entire range. The equation
gives:
--3.8 A --0.4
E =0to10V
1
= 0 to 1 arithmetic value
E =0to10V
2
= 0 to 2 arithmetic value
0.5to1.5
S2
S1
--0.4to--3.8
0to20mA
K2K1
--0.50.2
0.5to1.5
A
0.5 S 1.5
0.5 S 1.5
- Interfaces of the multi--function unit to the process
2 analog inputs AE: E1 = 0 to 10 V; E2 = 0 to 10 V
1 analog output AA: y = 0 to 20 mA A=--0.4to--3.8 0 to 100%
- Equipment required
Standard SIPART DR24 controller
set constants

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