All S7-200 SMART CPUs offer 1x Ethernet interface and the 1x RS485 interface onboard. Using Signal board CM01, one can add additional RS485/232 interface.
Ethernet communication
All the CPU modules are equipped with Ethernet interface, which supports Siemens S7 protocol, can support many terminal connections:
• Can be used as the programs downloading port (via general network cable)
• Communicate with Simatic Key/touch HMI with Profinet/Ethernet interface, maximally support 8 sets of equipment
• Communicate with multiple Ethernet equipment through the switch to achieve fast data communication.
• Supports up to 8 active GET/PUT connections and 8 passive GET/PUT connections.
S7-200 Smart PLC Ethernet communication
PROFIBUS
With EM DP01 expansion module S7 200 SMART CPU can be used in Profibus DP slave network. Slave ID of the CPU can be selected from the rotary switch on the EM DP01 module. The module supports any PROFIBUS baud rate between 9600 baud to 12M baud, the maximum allowable input 244 Bytes and 244 output bytes. It supports the following protocols:
• MPI Slave
• PROFIBUS-DP slave
S7-200 Smart PLC Profibus
Serial communication
On board RS485 port as well as additional RS232/485 port using CM01 can communicate with the inverter and touch screen and so on third party equipments. Signal board offers configurable S232/RS485 port, maximally supports for up to 4 devices. Serial port supports the following protocols:
• Modbus RTU
• PPI
• USS
• Free port communication (for interconnection with Bar code scanners, weighing scales, serial printers etc.)
S7-200 Smart PLC RS232-RS485 interface
OPC Communication (PC Access SMART)
Using Siemens PC Access SMART tool, it is possible to read/ write the data from S7-200 SMART PLC on to the host computer. This can be used for simple GUI requirements for data monitoring or data archiving. (PC Access SMART is an OPC server protocol specifically developed for S7-200 SMART series PLC, an OPC software dedicatedly developed for interaction between the S7-200 SMART PLC and host computer)
S7-200 Smart PLC OPC communication