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Siemens TCP/IP Ethernet Driver Help

Counters C0-C65535

Z0-Z65535

Word, Short Read/Write

See Also: Examples

Accessing Structured Elements in STEP 7

For the Siemens S7-1200 model, STEP 7 accesses the Counter and Timer structured elements as complete whole

structures instead of individual tags. For more information on the element offset and its server address

equivalent, refer to the tables below.

Counters

Element Data Type Offset Server Address Equivalent

Count_UP Boolean 0.0 DB1,C00.0

Count_Down Boolean 0.1 DB1,C00.1

Reset Boolean 0.2 DB1,C00.2

Load Boolean 0.3 DB1,C00.3

Q_UP Boolean 0.4 DB1,C00.4

Q_Down Boolean 0.5 DB1,C00.5

PAD Byte 1.0 DB1,B1

Preset_Value Short 2.0 DB1,I2

Count_Value Short 4.0 DB1,I4

Timers

Element Data Type Offset Server Address Equivalent

Start DWord 0.0 DB1,D0

Preset DWord 4.0 DB1,D4

Elapsed DWord 8.0 DB1,D8

Running Bool 12.0 DB1,DBX12.0

IN Bool 12.1 DB1,DBX12.1

Q Bool 12.2 DB1,DBX12.2

PAD Byte 13.0 DB1,DBB13

PAD_2 Byte 14.0 DB1,DBB14

PAD_3 Byte 15.0 DB1,DBB15

Note:

For more information, refer to Standard S7-300/400/1200/1500 Item Syntax.

S7 Data Types

The S7 data type is used to coerce the data type for a tag. It does not apply to Counters and Timers. The default

data types are shown in bold.

Data

Type

Description Address Range Data Type Suffix

Data Type w/

Suffix

None*

DBX**

Bit 0.b-65534.b

DBX0.b-

DBX65534.b

.b is Bit Number 0-

Boolean

DBB**

Unsigned Byte B0-B65535

DBB0-DBB65535

Byte, Char

DBW**

Unsigned Word W0-W65534

DBW0-DBW65534

Word, Short, BCD

DBD**

Unsigned

Double Word

D0-D65532

DBD0-DBD65532

DWord, Long, LBCD,

Float

F Float

*No S7 data type specified. Applies to non-DB memory types only.

**Applies to DB memory types only.

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