Siemens Simatic S7 Series System Manual

Communication
8.1 CPU communication connections
S7-200 SMART
354 System Manual, 09/2015, A5E03822230-AC
8.1
CPU communication connections
The CPU supports the following maximum number of simultaneous, asynchronous
communication connections:
● Ethernet programming port: The CPU provides the following connections:
– HMI/OPC connections: Eight dedicated HMI/OPC connections.
– PG connections: One programming device (PG) connection.
– Peer-to-peer (GET/PUT) connections: Eight connections to support S7-200 SMART
CPUs or network devices.
Note
The S7
-200 SMART CPU uses the GET and PUT instructions for CPU-to-CPU
communication.
● PROFIBUS port: Each EM DP01 PROFIBUS DP module can support six connections
with one reserved for an HMI device.
● Integrated RS485 port (Port 0): Four connections to support HMI devices.
● CM01 Signal Board (SB) RS232/RS485 port (Port 1): Four connections to support HMI
devices.
Note
STEP
7-Micro/WIN SMART can only connect to an S7-200 SMART CPU through the
Ethernet port. Only one PG can monitor one CPU at a time.
The RS485 and RS232 ports are only for HMI access (Data read/write) and Freeport
communications.

Siemens Simatic S7 Series Specifications

General

CPU	Varies by model (e.g., S7-300, S7-400, S7-1200, S7-1500)
Communication Interfaces	PROFIBUS, PROFINET, Ethernet, MPI
Programming	TIA Portal, STEP 7
Programming Languages	LAD, FBD, STL, SCL, GRAPH
I/O Modules	Digital, Analog, Specialty modules available
Operating Temperature	0°C to 60°C (standard models)
Mounting	DIN rail mounting
Operating Voltage	24V DC or 120/230V AC (varies by model)
Protection Class	IP20 (standard models)
Memory	Varies depending on the S7 model. Includes work memory (RAM) for program execution, load memory (EEPROM or Flash) for program storage, and system memory for operating system functions. Memory sizes range from kilobytes to megabytes.