Operating Instructions ACU
16 Control inputs and outputs
The modular structure of the frequency inverters enables a wide spectrum of applications on the
basis of the available hardware and software functionality. The control inputs and outputs of
terminals X210A and X210B described in the following can be linked to software modules freely via
the described parameters.
16.1 Multifunction input MFI1
Multifunction input MFI1 can be configured as a voltage, current or a digital input. Depending on the
selected Operation Mode 452 for the multifunction input, a link to various functions of the software
is possible. The unused operation modes are assigned the signal value 0 (LOW).
voltage signal (MFI1A), 0 V ... 10 V
current signal (MFI1A), 0 mA … 20 mA
digital signal (MFI1D), 0 V ... 24 V
The sampling rate of multi-function input MFI1D is slower than that of digital signals
S1IND, S2IND, etc. For this reason, this input should only be used for signals which
are not time-critical.
16.1.1 Analog Input MFI1A
Multifunction input MFI1 is configured by default for an analog reference value source with a voltage
signal of 0V to 10V.
Alternatively, you can select the operation mode for an analog current signal of 0 mA to 20 mA. The
current signal is continuously monitored and the error signal "F1407" displayed if the maximum
figure is exceeded.
16.1.1.1 Characteristic
Mapping of the analog input signal onto a reference frequency value or a reference percentage value
is possible for various requirements. Parameterization can be done via two points of the linear
characteristic of the reference value channel.
Point 1 with coordinates X1 and Y1 and point 2 with coordinates X2 and Y2 can be set in four data
sets.
The coordinates of the points relate, as a percentage, to the analog signal with 10 V or 20 mA and
parameter Maximum Frequency 419 or parameter Maximum Reference Percentage 519. The
direction of rotation can be changed via the digital inputs and/or by selection of the points.
The monitoring of the analog input signal via the parameter Error/Warning Behavior
453 demands the examination of the parameter Point X1 454
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