Siemens SIMATIC NET Dokumentacja Pobierz pdf (Strona 146)

136 Siemens Simatic S7 Driver Online Help

Valid Datablock Addresses

*The amount of physical I/O installed in the PLC determines the maximum length of

A, E, I, Q, PA, PE, PI, and PQ memory types. The maximum length of all other

memory types depends on the PLC model and RAM installed in the process

hardware. Consult your PLC documentation for specific information.

As the previous table shows, each memory type defaults to the Byte data type, except

for Counters and Timers. To learn more about other supported data types, refer to

Understanding Data Types.

Memory

Type

Description Address Range Maximum

Length on

S7 400*

Maximum

Length on

S7 300*

Default

Data Type

Example

A or Q Output 0-32767 238 bytes 128 bytes Byte A5

C or Z Counter 0-32767 119 words 111 words Counter C10

DB Global Data

Block

0-8191 (DB

number)

0-32767(address)

238 bytes 222 bytes Byte DB3,21

DI Instance

Data Blocks

0-8191 (DI

number)

0-32767(address)

238 bytes 222 bytes Byte DI22,256

E or I Input 0-32767 238 bytes 128 bytes Byte E3456

M Bit Memory 0-32767 238 bytes 222 bytes Byte M1200

PA or

Peripheral

Output

0-32767 238 bytes 222 bytes Byte PA32

PE or PI Peripheral

Input

0-32767 238 bytes 222 bytes Byte PE98

T Timer 0-32767 119 words 111 words Timer T11

1 2 ... 141 142 143 144 145 146 147 148 149 150 151 ... 267 268

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