Siemens Simatic S7 Series System Manual

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

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.