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7 Programming with the »PLC Designer«

7.4 Controller c300/p300: Access to odd Controller addresses

Lenze · Controller | Parameter setting & programming · Reference Manual · DMS 1.5 EN · 04/2014 · TD17

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2. In the case of many functions/function blocks, a pointer is transferred to a byte array and then

the content of the byte array is for instance interpreted as DWORD. This requires manual

conversion before the data are used:

General information about the use of pointers can be found in the "Pointer" section.

PROGRAM PLC_PRG

PROGRAM PRG_Logic

VAR

mySDO_READ : CIA405.SDO_READ4;

aReadData : ARRAY [1..4] OF BYTE;

dwDword : DWORD;

END_VAR

mySDO_READ(NETWORK:= 1,

ENABLE:= TRUE,

TIMEOUT:= 10000,

CONFIRM=>,

ERROR=> ,

DEVICE:= 1001,

CHANNEL:= 1,

INDEX:= 16#5FE7,

SUBINDEX:= 0,

DATA=> aReadData,

DATALENGTH=>,

ERRORINFO=>);

// Manually create a DWORD from a Byte array

dwDword := aReadData[1]

+ 256 * aReadData[2]

+ 65536 * aReadData[3]

+ 16777216 * aReadData[4];

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Lenze c300 Bedienungsanleitung Seite 63