7 User Examples
7.2 Mathematical Link (Example 2)
Manual
180
SIPART DR24 6DR2410
C79000-G7476-C153-03
7.2
Mathematical Link (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 = 0 to 10 V
1
= 0 to 1 arithmetic value
E = 0 to 10 V
2
= 0 to 2 arithmetic value
0.5 to 1.5
S2
S1
--0.4 to --3.8
0 to 20 mA
K2
K1
--0.5
0.2
0.5 to 1.5
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 = --0.4 to --3.8
≙
0 to 100%
- Equipment required
Standard SIPART DR24 controller
set constants
Содержание 6DR2410
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