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Command Interface

5-4

SIMATIC NET CP 243-2 AS-i Master

C79000-G8976-C142/02

A command started by the CP 243-2 is executed completely regardless of the

state of the ASI_COM bit.

The ASI_RESP bit is only reset by the CP 243-2 when the user program has set

the ASI_COM bit to “0”.

Example

The following example in STL applies to a CPU 222 with a CP 243-2 plugged in

directly beside it:

The example shows the sequence of the Read_Lists_and_Flags command.

Command execution is triggered by the positive edge at input 0.0.

To simplify matters, 224 bytes are always transferred to the CP 243-2 in these

examples. When the response is read in from the CP 243-2, 224 bytes are also

transferred. This allows each command to be processed regardless of its length.

Table 5-1

OB1 (STL)

NETWORK 1

LD SM0.1 //If: bit “First Scan”:

SI Q1.7, 1 //PLC_RUN = 1

RI Q.0, 6 //select bank 0

LD I1.1 //If: CP_READY

MOVW 16#3000, VW700 //Enter code “Read_extended_lists”

CALL 3 //Then: SBR 3

Table 5-2

SBR 3 (STL)

NETWORK 1 //Transfer the command data

LD I0.0 //If trigger bit

EU //pos. edge

AN Q1.6 //ASI_COM

AN I1.6 //ASI_RESP

RI Q1.0, 6 //Select bank 2

SI Q1.1, 1 //Select bank 2

BMW VW700, AQW0, 8 //V memory –> bank

SI Q1.0, 1 //Select bank 3

BMW VW716, AQW0, 8 //V memory –> bank

RI Q1.0, 2 //Select bank 4

SI Q1.2, 1 //Select bank 4

BMW VW732, AQW0, 8 //V memory –> bank

1 2 ... 67 68 69 70 71 72 73 74 75 76 77 ... 149 150

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Siemens SIMATIC NET Wartungshandbuch Seite 72