I2C_PCF8574_write block

Short summary

Name	`I2C_PCF8574_write`
→POU type	→function
Category	more system blocks, blocks for I2C elements
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. version 1.109.0 (for Neuron Power Engineer) and version 3.19.0 of Neuron RTS max This block is supported for Raspberry Pi and the platform `LinuxX86` only.

The block sets the outputs of PCF8574 (→I2C port expanders) to given values.

For more information on the PCF8574 chip see for example: http://www.nxp.com/documents/data_sheet/PCF8574.pdf (product specification by manufacturer NXP)

	Identifier	→Data type	Description
Inputs:	`fd`	`DINT`	the handle for the I2C device file opened by the `I2C_Open` block
	`address`	`INT`	the I2C address of the PCF8574 (port expander)
	`pin_values`	`ARRAY[0..7] OF BOOL`	the states of the PCF8574 outputs

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.

At present, there is no example.