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9 Visualization

Maschinenfabrik Reinhausen GmbH 2020 1596385142/08 EN ETOS

Alternating mode: Change interval

You can use this parameter to set the time period after which the cooling

stage is to be changed.

9.11.7 Configuring the frequency-based cooling system control

The optional frequency-based cooling system control function lets you con-

trol the fans in a cooling system using the frequency. The device calculates

the fan speed based on the temperature of the top-oil and the load factor.

The device uses the highest speed derived based on the configured depen-

dencies.

The device outputs the fan speed as an analog signal (0...10 V), using in-

verse logic in the process: 100% = 0 V, 0% = 10 V. The device records the

status of the connected frequency converter using inverse logic (low active).

Fan speed based on the top-oil temperature

If the top-oil temperature is less than the lower threshold, then the device

uses the minimum fan speed. If the top-oil temperature is greater than the

upper threshold, then the device uses the maximum fan speed. If the top-oil

temperature is between the lower threshold and upper threshold, then the

device calculates the necessary speed using a straight line between both

points S1 and S2.

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MR ETOS ED Specifications

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