Communications Options - Siemens SIMATIC S7 System Manual

Product overview

1.6 Communications options

1.6 Communications options
The S7-200 SMART offers several types of communication between CPUs, programming
devices, and HMIs:
● Ethernet:
– Exchange of data from the programming device to the CPU
– Exchange of data between HMIs and the CPU
– S7 peer-to-peer communication with other S7-200 SMART CPUs
– Open User Communication (OUC) with other Ethernet-capable devices
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.
● PROFIBUS:
– High speed communications for distributed I/O (up to 12 Mbps)
– One bus master connects to many I/O devices (supports 126 addressable devices).
– Exchange of data between the master and I/O devices
– EM DP01 module is a PROFIBUS I/O device.
● RS485:
– Provides a STEP 7-Micro/WIN SMART connection for programming when using a
– Supports a total of 126 addressable devices (32 devices per network segment)
– Supports PPI (point-to-point interface) protocol
– Exchange of data between HMIs and the CPU
– Exchange of data between devices and the CPU using Freeport (XMT/RCV
● RS232:
– Supports a point-to-point connection to one device
– Supports PPI protocol
– Exchange of data between HMIs and the CPU
– Exchange of data between devices and the CPU using Freeport (XMT/RCV
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USB-PPI cable
instructions)
instructions)
System Manual, V2.3, 07/2017, A5E03822230-AF
S7-200 SMART