Example; Programmable Analog Inputs; Settings - ABB ACS355 User Manual

130 Program features

Example

The drive runs a conveyor line. It is speed controlled but the line tension also needs
to be taken into account: If the measured tension exceeds the tension setpoint, the
speed will be slightly decreased, and vice versa.
To accomplish the desired speed correction, the user
• activates the trimming function and connects the tension setpoint and the
measured tension to it.
• tunes the trimming to a suitable level.
Speed controlled conveyor line
Simplified block diagram
Speed reference
Tension
measurement
Tension
setpoint

Programmable analog inputs

The drive has two programmable analog voltage/current inputs. The inputs can be
inverted, filtered and the maximum and minimum values can be adjusted. The update
cycle for the analog input is 8 ms (12 ms cycle once per second). The cycle time is
shorter when information is transferred to the application program (8 ms -> 2 ms).

Settings

Parameter
Group 11 REFERENCE SELECT
Group 13 ANALOG INPUTS
3001, 3021, 3022, 3107
Group 35 MOTOR TEMP MEAS
Groups 40 PROCESS PID SET 1
...42 EXT / TRIM PID
Tension measurement
Add
PID
Additional information
AI as reference source
Analog input processing
AI loss supervision
AI in motor temperature measurement
AI as PID process control reference or actual value
source
Drive rollers (pull)
Trimmed speed
reference