Siemens SIMATIC S7-200, Системное руководство, Страница: 191 / 866

Program instructions
7.3 Communication
S7-200 SMART
System Manual, V2.3, 07/2017, A5E03822230-AF
191
7.3 Communication
7.3.1 GET and PUT (Ethernet)
You can use the GET and PUT instructions for communication between S7-200 SMART
CPUs through the Ethernet connection.
Note
The CPU models CPU CR20s, CPU CR30s, CPU CR40s, and CPU CR60s have no
Ethernet port and do not support any functions related to the use of Ethernet
communications.
Table 7- 1 GET and PUT instructions
LAD/FBD STL Description
GET table
The GET instruction initiates a communications operation on the
Ethernet port to gather data from a remote device, as defined in the
description table (TABLE).
The GET instruction can read up to 222 bytes of information from a
remote station.
PUT table
The PUT instruction initiates a communications operation on the
Ethernet port to write data to a remote device, as defined in the
description table (TABLE).
The PUT instruction can write up to 212 bytes of information to a
remote station.
You can have any number of GET and PUT instructions in the program, but only a maximum
of 16 GET and PUT instructions can be activated at any one time. For example, you can
have eight GET and eight PUT instructions, or six GET and ten PUT instructions, active at
the same time in a given CPU.
When you execute a GET or PUT instruction, the CPU makes an Ethernet connection to the
remote IP address in the GET or PUT table. The CPU maintains a maximum of eight
connections at a time. Once a connection is established, that connection is maintained until
the CPU goes to STOP mode.