Communication
8.2 CPU communication ports
S7-200 SMART
System Manual, V2.3, 07/2017, A5E03822230-AF
397
There are four communication interfaces on the S7-200 SMART CPU that provide the
following communication types:
● Ethernet port (if your CPU model supports it):
– STEP 7-Micro/WIN SMART programming
– GET/PUT communication
– HMI: Ethernet type
– Open User Communication (OUC) over UDP, TCP, or ISO-on-TCP
● RS485 port (Port 0):
– STEP 7-Micro/WIN SMART programming when using a USB-PPI cable
– TDs/HMI: RS485 type
– Freeport (XMT/RCV) including Siemens-provided USS and Modbus RTU libraries
● PROFIBUS port: The S7-200 SMART CPUs can support two EM DP01 modules for
PROFIBUS DP and HMI communication if your CPU model supports expansion modules.
● RS485/RS232 signal board (SB) (if present, Port 1):
– TDs/HMIs: RS485 or RS232 type
– Freeport (XMT/RCV) including Siemens-provided USS (RS485 only) and Modbus
RTU (RS485 or RS432) libraries
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