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External '''[[Digital I/O]]''' can be managed by the program with a series of Non-Standard [[DMIS]] commands.<br/>
These commands can be applied to I/O at controller level (when supported) or to an external I/O card (Verify on Arco control Panel for suitable cards).<br/>


== Reading the value of an Input ==
These commands read the value of an input at the moment the command is executed.<br/>

The sintax is : <code>INPUT_READ(input_number,card_name)</code><br>

Where
::''input_number'':	is the number of the input to be read<br/>
::''card_name'':	is the label of the additional card as described in Arco Control Panel.<br/>
If the ''card_name'' value is not specified, then the input is read from the controller and not from the additional board.<br/>

Example:<br/>
<code><span style="color: green; text-decoration: none;">$$ read Input n° 5 from the controller </span></code>
::<code>DECL/BOOL,RSLT</code>
::<code>RSLT=ASSIGN/ INPUT_READ(5) </code>		

<code><span style="color: green; text-decoration: none;">$$ read Input n° 5 from the external board with label ‘MyBoard’ set in the control panel.</span></code>
::<code>RSLT=ASSIGN/ INPUT_READ(5,’MyBoard’) </code>

===Important Note===
The command <code>IOTEST(n) </code> from version 3.6 has been obsoleted and it is no longer available.<br/>

==Waiting a mask of input to be set==
This command waits until the mask of input is active, after that, the execution continues.

The sintax is : <code>CALL/EXTERN,DME,'logical_IO','wait_for_input_mask','card_name', input_number,value, input_number,value</code><br/>

Where<br/>

::''card_name'':	is the label of the additional card as described in Arco Control Panel.<br/>
::''input_number'':	is the number of the input to be read<br/>
::''value'':	is the expected value from the input (.true. or .false.)<br/>

If the ''card_name'' value is not specified, then the input is read from the controller and not from the additional board.<br/>

Example:<br/>
<code><span style="color: green; text-decoration: none;">$$ wait until input 5 is true and 6 is false on the controller IO board</span></code>
::<code>CALL/EXTERN,DME,'logical_IO','wait_for_input_mask',5,.true.,6,.false.</code>

<code><span style="color: green; text-decoration: none;">$$ wait until input 5 is true and 6 is false on the external board called ‘myBoard’ in the control panel</span></code>
::<code>CALL/EXTERN,DME,'logical_IO','wait_for_input_mask',’myBoard’,5,.true.,6,.false.</code>

==Writing the value in an Output==
This command sets the value of an output.<br/>
The sintax is : <code>CALL/EXTERN,DME,'logical_IO','output_set', 'card_name', input_number,value</code><br/>


Where<br/>

::''card_name'':	is the label of the additional card as described in Arco Control Panel.<br/>
::''input_number'':	is the number of the input to be read<br/>
::''value'':	is the value to be set (.true. or .false.)<br/>

If the ''card_name value'' is not specified, then the input is read from the controller and not from the additional board.<br/>

Example:<br/>
<code><span style="color: green; text-decoration: none;">$$ set the output 5 to true on the controller IO board</span></code>
::<code>CALL/EXTERN,DME,'logical_IO', 'output_set',5,.true.</code>

<code><span style="color: green; text-decoration: none;">$$ set the output 5 to true on the external board called ‘myBoard’ in the control panel</span></code>
::<code>CALL/EXTERN,DME,'logical_IO', 'output_set',’myBoard’,5,.true.</code>


===Important Note===
The command:<code>IOSET,n</code> and <code>IORESET,n</code> from version 3.6 has been obsoleted and it is no longer available.

[[it:Modifica di I / O digitale]]
[[zh-cn:编辑数字I / O]]
[[pt:Edição Digital I / O]]
[[de:Digitale I / O bearbeiten]]
[[es:Edición de E / S digital]]
[[en:Editing Digital I/O]]