Download Siemens SIMATIC NET Specifications

[1]
I/O Server
Is the I/O driver core. The I/O Server contains objects and interfaces that
perform the following tasks:
[2]
•
Maintain the I/O driver configuration.
•
Read and write process hardware data.
•
Expose the driver functionality through OLE Automation.
Server Objects
Consist of the following objects:
[3]
•
Driver Object to manage channel objects and the overall state of the
driver.
•
Channel Object to define the properties and methods that govern the
behavior of a channel. A channel is an I/O driver’s communication
path.
•
Device Object to define the properties and methods that govern the
behavior of a device. A device is a hardware device or station that
exists on a channel.
•
Datablock Object to define the properties and methods that manage the
behavior of a datablock. The datablock object is an addressable portion
of a device and contains datablocks in the Server’s local memory
corresponding to data areas in the Common Memory DLL. When you
add new datablocks to the Server’s local memory, you also add new
data areas to the Common Memory DLL.
OLE Interfaces
Expose the data and functionality of the Server to other applications.
[4]
I/O Library
Translates generic driver requests into API-specific calls to the process
hardware.
40
Siemens Simatic S7 Driver Online Help