User manual

Publication 1760-UM001A-EN-P
Drawing a Circuit Diagram with Pico 4-33
Programming Analog Comparators
You integrate an analog comparator into your program in the form of a contact.
Use the parameter display to select one of six possible comparators and enter the
setpoint values.
1.
1.1.
1. Enter the relay contact for the analog comparator in
the contact field.
The cursor moves to the contact number of the
comparator.
2. Press Ok to switch to the parameter display.
The parameter set for the first comparator is displayed.
3. Use the left and right arrows to move the cursor to the field greater than or
equal to. Use the up and down arrows to select one of the comparator relays.
4. Press Ok to finish or enter another setpoint value. Press Esc to return to the
circuit diagram display.
IMPORTANT
Analog signals of sensors typically fluctuate by several
millivolts. For stable set and reset switching, the setpoints
should differ by at least 0.2V (switching hysteresis).
ATTENTION
!
!!
!
To prevent the uncontrolled switching of the relay coils only
use the Set and Reset functions with the analog comparators.
A
1
---------SQ3
ANALOG
ANALOG
I7
0.0
A1
+
I7
0.0
A1
+
ANALOG
I7
I8
A1
+
ANALOG
ANALOG
I8
0.0
A1
+
I8
0.0
A1
+
ANALOG
I7
I8
A1
+
I7 is greater than or equal
to I8
I7 is greater than or equal
to Setpoint
I7 is less than or equal to
Setpoint
I7 is less than or equal to
I8
I8 is greater than or equal
to Setpoint
I8 is less than or equal to
Setpoint