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4 Wiring with
4.4 Analog value comparator/threshold value switch
4.4.5.6 Example: Analog value comparator as two-step controller
I5uA1----SQ1
hA2u---RQ1
I5---k
I5uA1----SQ1
hI7u---RQ1
I5---k
92
If, for example, the temperature goes below a value, A1 switches on the
output Q5 with the enable input I1. If the temperature exceeds the set value,
A2 will switch off. If there is no enable signal, output Q1 will always be
switched off by I5.
Parameter settings of both analog value comparators:
Switch-on
A1 LT
+
Æ
I1
I7
F1
+0
æ
I2
0500
F2
+0
OS
+0
HY
+0
A simple circuit can be implemented if a switching point of the controller is
assigned to the digital switching point of the analog input. This switching
point has a 8 V DC (easy-DA, easy-DC) and 9.5 V (easy-AB) signal.
Parameter settings:
Switch-on
A1 LT
+
Æ
I1
I7
F1
+0
æ
I2
0500
F2
+0
OS
+0
HY
+0
Operating instructions 05/10 MN05013003Z-EN www.eaton.com
Switch-off
A2 GT
+
Æ
I1
I7
F1
+0
æ
I2
0550
F2
+0
OS
+0
HY
0015
Switch-off
The switch point is
implemented via I7 (digital
switching signal).
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