Serialize - Siemens SIMATIC S7-1200 System Manual

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Basic instructions

8.6 Move operations

Serialize

You can use the "Serialize" instruction to convert several PLC data types (UDTs) to a

sequential representation without any loss of structure.

You can use the instruction to temporarily save multiple structured data items from your

program to a buffer, for example to a global data block, and send them to another CPU. The

memory area in which the converted PLC data types are stored must have the ARRAY of

BYTE data type and be declared with standard access. Make sure that there is enough

memory space prior to the conversion.

The POS parameter contains information about the number of bytes that the converted PLC

data types use.

If you only want to send a single PLC data type (UDT), you can use the instruction "TSEND:

Send data via communication connection".

SERIALIZE instruction

Parameters for the SERIALIZE instruction

SRC_VARIABLE

ret_val := Serialize(

SRC_VARIABLE=>_variant_in_,

DEST_ARRAY:=_variant_out_,

POS:=_dint_inout_);

Converts a PLC data type

(UDT) to a sequential repre-

PLC data type (UDT) that is

to be converted to a serial

representation

Data block in which the gen-

erated data stream is to be

Number of bytes that the

converted PLC data types

use. The calculated POS

parameter is zero-based.

Error information

S7-1200 Programmable controller

System Manual, V4.2, 09/2016, A5E02486680-AK