Siemens SINAMICS S120 Manuel - Page 31

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7 Using AOIs in a New Application

7.2.2

I/O Interface

Connecting the instruction to the Controller IO tags is accomplished by moving the

IO data into the AOI Interface.

Figure 7-1

The second rung holds the AOI. The local variables "InputDataBuffer" and

"OutputDataBuffer" are used as storage for the AOI to receive and send data to the

Controller IO tags.

The first rung copies the IO data for this Red Wheel to a local variable to be used

by the AOI as inputs in the "DRV_STATUS" parameters. "DRV_STATUS" and

"DRV_CONTROL" is declared as INOUT parameters and therefore passed by

reference.

The third rung holds the copy command that moves the control data from the

working variable "OutputDataBuffer" to the controller IO tag.

All AOIs provided will use this method of data exchange with IO containing the

drive data. Additional access to the control data can be performed before the data

is copied to the IO Tag. This allows the user to utilize features already mapped in

the telegram that are not control by the AOI. In a similar manner the Status data

can be access by the user program.

SINAMICS S: Speed control of a S120 with an Allen-Bradley controller

(Compact/ ControlLogix with RSLogix 5000) via EtherNet/IP

Entry-ID: 92045369,

V4.0,

08/2018