Gonnheimer Elektronic DC 155, Руководство пользователя

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DC155 4 manual Page 9
Gönnheimer Elektronic GmbH phone.: +49 (6321) 49919-0, fax: -41 Email: info@goennheimer.de
2.3.4 Batch control with absolute level signal (requires 4...20mA analog input option )
This kind of batch control does not work with a flow signal, but with an absolute level signal. You can either
measure the level in the container that is being filled (level rises during dosing) or the level of the container
from which the material to be dosed is removed (level falls during dosing). The valves are controlled as in
the other operating modes. Flow monitoring or displaying is not possible in this mode.
2.3.5 Forward - backward Impulse counter (requires 2 Impulse inputs option)
Some kinds of flow sensors (e. g. windmill-type anemometer) recognises back flows. These have two sensor
signals. The DC155 can determinate the flow direction using the phase relation of the two signals.
Configuration and handling of the DC155 with this option is equal to any standard application.
2.4 Creep suppression
In some applications, when using 4-20mA analog
inputs, it is necessary to suppress adding up small
flow quantities.
The figure on the right hand shows its function.
Adjust the creep suppression value in the structure
menu.
Figure 3: creep suppression