Vega WEIGHTRAC 31 Operating Instructions Manual page 42

Radiation-based sensor for mass flow detection

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7 Setup with PACTware

Fig. 26: Select process speed

Input

If you have neither a tachometer on the conveyor belt nor the actual

belt speed from the plant control system, you should deactivate the

input of the process speed by selecting "No belt/spiral stop signal". In

such case you have to enter a fixed conveyor belt speed.

You can transmit the conveyor belt speed via an "Analogue input

(4 ... 20 mA)" or a "Digital input (frequency input)". Tachometers are

designed mainly for digital input.

Here you have the possibility to process only one "Belt stop signal". In

this case you have to enter a fixed belt speed.

Scaling min./max.

If you have selected one of the inputs for the process speed, you can

determine here the min. and max. values for the input. Specify mA for

analogue input and Hz for digital input.

Unit - Belt/screw speed

Here you can select the unit of the conveyor belt speed (e.g. m/s, ft/

min etc.)

Belt/screw speed min./max.

Here you can enter the min. and max. speed of the conveyor belt.

Select inputs (step 3)

In this window you can carry out the settings for the inputs of

WEIGHTRAC 31.

WEIGHTRAC 31 • 4 ... 20 mA/HART - four-wire

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