A&D Multi Function Weighing Indicator AD-4402 Especificações descarregar pdf (Página 41)

AD-4402 Page 39

7.3.

7.3.7.3.

7.3. Built

BuiltBuilt

Built-

-in

in in

in A

Automatic

utomatic utomatic

utomatic P

Program

rogram rogram

rogram M

Mode

odeode

ode

The built-in automatic program mode directly outputs control signals (example:

medium flow valve, batch finish) without a PLC.

The built-in automatic program mode can include several partial sequences like an

initial flow sequence, mixing sequence etc. into basic built-in automatic program

mode.

The power of the control I/O signal output is too small to drive a large valve directly.

Use option relay output ( OP-02 ) to drive them.

If the number of control I/O terminals is not enough, use parallel option I/O ( OP-05 ).

Forecast Control Function

This function forecasts a timing to close the dribble flow (valve) and realizes more

precise weighing. The forecast method calculates the weighing value at some points

between sampling data and compares it with the dribble setpoint. The effect is

equivalent to using a high speed A/D converter. The sampling rate of this indicator is

100 [times/second]. But the ratio is equivalent to 1000 [times/second], when this

function is used.

Caution

If multiple supplying hopper is used (the recipe code is used), this mode can

not be used.

Related section " 7.3.7. Automatic Selection of Supplying Hopper".

Use a high speed high, precision valve like a direct voltage solenoid valve.

Design the mechanical valve so as to minimize the delay time.

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A&D Multi Function Weighing Indicator AD-4402 Especificações Página 41