User Manual

Function blocks
153
08/04 AWB2528-1423GB
NOT Boolean sequence
The NOT sequence operates according to the following rules:
>I1, positive value
Negate value of
>I1 and subtract 1:
–|
>I1| – 1 = >I2
>I1
, Negative value
Value of
>I1 and subtract 1:
|
>I1| – 1 = >I2
Counters
easy800 provides 32 up/down counters from C 01 to C 32. The
counter relays allow you to count events. You can enter
upper and lower threshold values as comparison values. The
contacts will switch according to the actual value. To specify
a start value, for example, counting from the value 1200,
this can be implemented using a “C ..” counter.
The “C..” counters are cycle time dependent.
Wiring of a counter
You integrate a counter into your circuit in the form of a
contact and coil. The counter relay has different coils and
contacts.
Value >I1 :13219
dec
=
00000000000000000011001110100011
bin
Value >I2 : Omitted
Result QV>: –13220
dec
=
11111111111111111100110001011100
bin
h
To prevent unpredictable switching states, use each coil of
a relay once only in the circuit diagram.