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VTB USER GUIDE

NOTES FOR PROGRAMMING WITH DIGITAL I/O

To obtain an application program more clear and stable we suggest to call the I/O function only from TASK PLC. Therefore,

in this task, read the inputs writing them in a GLOBAL variable (ex. Input) and write the outputs reading them from

another GLOBAL variable (ex. Output). On these variables can be defined the single bits associated to the digital channels

and then using them at occurrence.

Example

Used variables:

Input1 UINT

Input2 UINT

Output1 UINT

Output2 UINT

StartButton BIT Input1.3

StopButton BIT Input1.6

WaterPump BIT Output2.12

In TASK PLC:

Input1=Ng_Di(0)

Input2=Ng_Di(1)

Ng_Do(0,Out1)

Ng_Do(1,Out2)

EVERYWHERE:

if StartButton

WaterPump=1

endif

if StopButton

WaterPump=0

endif

NG_ADC – ANALOG INPUTS

The NG35 is equipped with 8 analog input channels at 10 Bit, these can be read by the function ng_adc.

Syntax

Uint NG_ADC(Char Chan)

Parameters

Chan Number of the channel (from 0 to 7)

Return value:

Returns the analog value (from 0 to 1023).

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Vision VTB-101 Guida Utente Pagina 75