ABB ACS 800 Series, Application Manual

Page: 21 / 44

Function blocks
21
DPOT Type Counter function
Illustration
Operation The digitally controlled ramp function increments or decrements the output O
according to control inputs I1 and I2. The input I1 ramps the output to positive
direction and I2 to negative direction. If both inputs are active, nothing happens. The
step is defined by the input I3.
Input I1: Count up
Input I2: Count down
Input I3: Ramp step to positive/negative direction (step/sec).
Note: The internal calculation uses 48 bits accuracy to avoid offset errors.
Connections Input I1 and I2: Boolean values
Input I3: 24 bit integer value (23 bits + sign)
Output (O): 24 bit integer value (23 bits + sign)
EVENT
Type Event function
Illustration
Operation Input I1 triggers the event. I2 selects the parameter index from which the event
message (text string) is read. I3 selects the type of the event (warning or fault).
Connections Input I1, I3: 24 bit integer values (23 bits + sign)
Input I2: String (compulsory)
FILTER
Type Filtering function
Illustration
I1
I2
I3
DPOT
O
I1
I2
I3
EVENT
I1 I2 I3 Cause
0->1 block activates the event
0 block deactivates the event
I2 contents of the event message
0 type of event: warning
1 type of event: fault
2 type of event: event
I1
I2
FILTER
O