124 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 is 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.
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 Additional information
Group 11 REFERENCE SELECT AI as reference source
Group 13 ANALOG INPUTS Analog input processing
3001, 3021, 3022, 3107 AI loss supervision
Group 35 MOTOR TEMP MEAS AI in motor temperature measurement
Groups 40 PROCESS PID SET 1
…42 EXT / TRIM PID
AI as PID process control reference or actual value
source
Group 44 PUMP PROTECTION AI as pump protection measurement source
Add
Tension
measurement
Tension
setpoint
Trimmed output
frequency reference
PID
Speed controlled conveyor line
Simplified block diagram
Tension measurement
Drive rollers (pull)
Output frequency
reference
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