Product overview
1.4 Communications options
S7-200 SMART
22 System Manual, 09/2015, A5E03822230-AC
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
● 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:
– 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
instructions)
● 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
instructions)
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