I2C_open block

Short summary

Name	I2C_open
→POU type	→function
Category	more system blocks, blocks for I2C elements, block with internal error diagnostic
Graphical interface
Available since	version 1.13.0 (for Neuron Power Engineer) and version 2.3.901 of Neuron RTS max This block is supported for →Raspberry Pi only.

Functionality

The block initializes a device file of the Linux "i2c-dev" driver for I/O operation.

For more information on the  die "i2c-dev" Modules see for example: https://www.kernel.org/doc/Documentation/i2c/dev-interface

Inputs, return value

	Identifier	→Data type	Description
Inputs:	bus_id	INT	the ID of the →I2C bus (0 = /dev/i2c-0, 1 = /dev/i2c-1, etc.)
Return value:	–	DINT	returns the file descriptor for subsequent I2C I/O operations

Input EN and output ENO are available when →calling the block. See "Execution control: EN, ENO" for information on input EN and output ENO.

See:

• "Blocks for safe logic" whether this block is supported for developing safety-relevant applications.

• "Highlighting safe logic in the FBD-editor" for the effects when using the block as a block for safe logic.

Internal error diagnostic for block

See "System_open block". 

Example for usage within ST-editor

At present, there is no example.