ABB ACS 800 Series, Application Manual

Page: 20 / 44

Function blocks
20
Operation Output bits 0, 1 and 2:
- If I1 > I2, O = … 001 (Output bit 0 is set.)
- If I1 = I2, O = … 010 (Output bit 1 is set.)
- If I1 < I2, O = … 100 (Output bit 2 is set.)
Output bit 3:
- If I1 > I2, O = … 1xxx (Output bit 3 is set and remains set until I1 < I2 - I3, after
which bit 3 is reset.)
Output value on display:
Connections Input I1, I2 and I3: 24 bit integer values (23 bits + sign)
Output (O): 24 bit integer (packed boolean)
COUNT
Type Counter function
Illustration
Operation The counter function counts rising edges of the input I1.
The counter is reset by the rising edge of input I2 and limited to the value set with
the input I3.
I1: Trigger input
I2: Reset
I3: Max limit for the counter (B0…B19 -> 0…1048575)
O: Value of the counter (B0…B19 -> 0…1048575), and status of the counter (B20).
B20 = 1: Counter is at max limit or input I3 is negative.
Connections Input I1 and I2: Boolean values
Input I3: 24 bit integer value (20 bits used by the counter)
Output (O): 24 bit integer value (20 bits for counter value and 4 indication bits)
bit 0 bit 1 bit 2 bit 3 O (value on display)
0 0 0 0 0
1 0 0 0 1
0 1 0 0 2
0 0 1 0 4
0 0 0 1 8
1 0 0 1 9
0 1 0 1 10
0 0 1 1 12
I1
I2
I3
COUNT
O