S7 Communication; Get And Put Instructions - Siemens SIMATIC S7-1200 Manual

A new slave that has not been assigned an address always has address 0. It is detected by
the master as a new slave without an address assignment and is not included in normal
communication until assigned an address.
In the Properties window, select the "AS-i address" configuration entry. STEP 7 displays the
AS-i address configuration dialog, which is used to assign the AS-i address of the device.
Table 7- 14 Parameters for the AS-i address
Parameter
Subnet Name of the Subnet to which the device is connected.
Parameters Address
Transmission rate
7.8

S7 communication

7.8.1

GET and PUT instructions

You can use the GET and PUT instructions to communicate with S7 CPUs through
PROFINET and PROFIBUS connections.
● Accessing data in an S7-300/400 CPU: An S7-1200 CPU can use either absolute
● Accessing data in a standard DB: An S7-1200 CPU can use either absolute addresses or
● Accessing data in an optimized DB; An S7-1200 CPU can only use symbolic names to
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Description
Assigned AS-i address for the slave device in range of 1(A or B) to 31(A or
B) for a total of up to 62 slave devices
Transmission rate of the configured AS-i network is 10 ms.
addresses or symbolic names to address variables of an S7-300/400 CPU. Data types of
the remote communication partner that are not supported by the calling S7 1200-CPU
may only be accessed as a byte array. For example, S7-300 data type DT is accessed as
an array of 8 bytes.
symbolic names to address DB variables in a standard DB of a remote S7 CPU.
address DB variables in an optimized DB of a remote S7 CPU. Only variables of the first
nesting level are supported. This includes variables which are declared in an optimized
global DB at the DB level. Components of optimized DB structures or elements of arrays
cannot be addressed.
Easy to communicate between devices
7.8 S7 communication
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