Operating Instructions ACU
Operation Mode Speed Controller, parameter Operation Mode 440 = 4
This operation mode is suited for speed controls with an analog actual value transmitter (e.g. analog
speedometer via analog input or HTL encoder via frequency input). The motor is accelerated or
decelerated according to the control deviation.
The output frequency is limited by the Maximum Frequency 419.
Minimum Frequency 418 has no limiting effect in Operation Mode “4-Speed Controller”. In
Configurations 411, 511 and 611 this can result in longer operation of the motor in current
impression mode (current frequency < Frequency Limit 624). Prevent excessive motor heat-up by
long current impression operation.
Operation Mode “4-Speed Controller” can result in reversal of the drive.
Technology
Controller
Act. Percentage
Source 478
Ref. Percentage
Channel
Ref. Percentage
Source 476
Amplification 444
P
Differential Time 618
I
Integral Time 445
+
+
-
Max. P-Component
Limitation
Max.
I-Component
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