Built-In Automatic Program Mode - AND Multi Function Weighing Indicator AD-4402 Instruction Manual

7.3. Built 7.3. Built- - - - in in in in A A A A utomatic
7.3. 7.3. Built Built
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.
AD-4402
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