User manual

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Wiring with EZ
MN05013003E112
Example: Analog value comparator as two-step
controller
If, for example, the temperature goes below a value, A1
switches on the output Q1 with the enable input I5. 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:
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 (EZ-DA, EZ-
DC) and 9.5 V (EZ-AB) signal.
Parameter settings:
I5uA1----SQ1
hA2u---RQ1
i5---k
Switching on Switch off
A1 LT +
I1 I7 Æ
F1 +0
I2 0500 æ
F2 +0
OS +0
HY +0
A2 GT +
I1 I7 Æ
F1 +0
I2 0550 æ
F2 +0
OS +0
HY 0015
I5uA1----SQ1
hI7u---RQ1
i5---k
Switching on Switch off
The switch point is
implemented via I7 (digital
switching signal).
A1 LT +
I1 I7 Æ
F1 +0
I2 0500 æ
F2 +0
OS +0
HY +0
EZ500_700.book Page 112 Tuesday, May 3, 2005 5:15 PM